Sorry about the foam in the case holding the RF Signal Strength Meter falling apart. It was not like that when I sent it to you. Thanks for a great tear down.
Hi Dave, thanks for including RoutaBoard in your Mailbag review. Those were the earliest generation samples which I sent you right from the first prototype batch (best suited for the museum now). The recent model is improved with a better layout on the two sides, two more global buses, solder paste pre-applied over the contacts, so they can be bridged together by simply touching them with the iron. Still black soldermask, though. But point taken, I might try out a few different colours in the future, and see which one will work best. Don't rush yet having a test go with the old ones. :-) KnivD
I've got the newer version RoutaBoards and just want to say how fantastic I think they are! I don't think I'd ever use the software, although I have played with it out of curiosity, and I appreciate the effort that went into it. Still, this is, far and away, the most useful proto-board I've ever had the pleasure of building with. The manufacturing quality is top notch. I find they're even better for SMT than those shitty checkerboard PCBs you can get. SOIC and chip carrier packages fit perfectly, but anything smaller than 1.27 mm, and you're out of luck (not that you'll find boards like these that are so flexible in the first place). I really hope they catch on more and that you keep producing them. As you can see, I cannot recommend them highly enough.
As it's for a pro camera, chances are there is gas-gauging in the pack to tell the operator how much time is left, and do stuff like lifetime management. A bad battery on a film set could be very expensive.
THANK YOU! And this is why I have, since I was a teen, been completely ANNOYED by Gilligan's Island! There is no way a know-it-all "Professor" who could make batteries from coconuts and seawater would NOT KNOW you can make essentially ANY receiver into a transmitter simply by pumping more current through the local oscillator! You have a radio that works! You are supposed to know everything! HOW DO YOU NOT KNOW TO SHORT THE EMITTER OF THE LO AND TRANSMIT CW ON AM BROADCAST? Shortest TV series ever.
A while ago I was reading a story from the ministry that is responsible for tracking down radio frequency disturbances, and they found a similar radio with a similar error (though the story reads in the 180MHz range, might have been the harmonics though). All the story said was that some "components responsible for coupling the LO into the receiver failed, diverting the signal" so my guess here is that some rf related cap failed short.
Kind of poetic how we've been building radios for over 100 years now and yet it's STILL the darn capacitors that cause the problems? The more things change, the more they stay the same, right? I thought about this for a while, and if they're using a notch filter on the input to keep the LO frequency off of the antenna, it could be that the LO has drifted a bunch. If it's crystal controlled the crystal could be damaged, or the circuit could be just so drastically out of tune that the crystal can't pull it back into alignment. If that's true than all the filters designed to block the LO frequency could still be doing their jobs and the signal from the LO would still get out since it's on the wrong frequency. Went down the rabbit hole a bit on that one, but hopefully it's understandable. I know just enough about RF to know that I don't know enough to be talking about this kind of stuff with any kind of authority, I'm just hypothesizing. Of course it could also be something as simple as dried out power supply decoupling capacitors, a fact that jumped out at me since Dave mentioned that this was built in the early-mid 2000's. Those caps have been in service for 10-16 years by now, and that could by itself be enough to cause them to drift and/or fail if they're using whatever is cheapest at the shenzen market that week. On another note, I'd bet this radio would have been tracked down as a noise source by some ham radio operator if left on long enough. It looks like it was putting out some serious harmonics well above the 95Mhz "fundamental" peak.
When I was 10 years old I tryed to "modify" a cheap FM radio by adding bridge wires to the circuit and turning the tuning coils. I had no idea what I was doing the the thing went totally crazy. I was able to jam most TV channels from 100 meters away with the radio. I wish I still had the thing to test it on my spectrum analyser.
The filter of the output signal processor of the Frequency mixer could be faulty. Meaning that the device is now transmitting the 4 different Frequency signals at the same time, and possibly at an amplified level, if the amplification section of the output signal processor is still working The Multiplier component of the frequency mixer could also be faulty, in that it is not able to correctly tell the output processor how much amplification is needed from the data of the original signal I'm probably terrible wrong, but what can you do..
"I was able to jam most TV channels from 100 meters away with the radio." Some older computers had a similar effect in that the screens RF made sounds through the computers speakers because of the high level of/ poor RF shielding etc
For another video, I'd love to see what kind of output that vibrating inverter puts out, and maybe compare with a modern inverter (modified or pure sine)
I don't know about failure modes, but in my wild and careless youth, I had this habit of turning old superhet FM receivers into FM transmitters. Long story short, even if you have proper variable caps for the tuning, you very often have varicaps for AFC. So, find the afc control voltage net, add a chain of components consisting of an RF choke, DC block cap and pre-emphasis network and apply appropriate voltage level signal and you have a low-power transmitter... So if you go ghost-hunting on the clock radio, my chief suspect would be some component failure or crud in the LO signal net.
Using a working radio and tuning it to the local oscillator of another one is a known old time trick used to check if the oscillator of a receiver you're servicing is running or not.
I think that Tektronix SignalMini was(and probably still is in some places) used by cable companies to determine if there is strong clean signal flowing through the cable line. I remember seeing my cable guy use something like that back in the day.
In that clock radio thing it looks like the front end amplifier has become an oscillator. Some of it's output energy is feeding back to it's input, and hence to the antenna. Early transponders for military aircraft worked like this. They were basically an antenna connected to a tube amplifier that was on the edge of instability. When an RF burst comes in from the interrogator on the ground (or ship) the amplifier would go unstable for a short time, during which it transmitted back another RF burst at about the same frequency.
I liked the fact there was less commercial stuff in this one. A suggestion I have would be to minamise the commercial stuff which is probably impossible, however you could put it all at the end so it can be skipped if desired. Not sure if other agree, lets hear what everyone has to say on this =-)
That Li-Ion professional camera battery charger is for V-Mount batteries, the batteries themselves have micros inside that can talk to the camera via different protocols (I2C, analogue etc) depending on the camera manufacturer, to report the remaining time by sensing current draw, autobalancing the battery cells etc. the chargers usually cost over 300 euros. and the batteries are also 150+ euros.
For the radio, read the book Spycatcher and you will find a description of a technology to track radio receivers by LO emissions. Since spies don't want to be heard, they use a different frequency from the ones in commercial use. Spies typically would listen all the time and only transmit on cue or on time. thus the only way to catch a spy reciever was to listen for the LO emissions. Modern radio receivers would not likely emit the level of LO noise that old radios did though.
I think the RF strength meter's charger socket's sub-circuit-board may be just a space saving measure. (Main circuit-board has the clearance it needs without one half of the outer-case becoming too deep.)
The connector on the TEK meter could be done this way because this product is pointed to different markets and different connectors may be suitable. Also, as a second idea, it might be done this way to recess a connector in respect to pcb to meet some height considerations.
Dave, I think the interfaceconnector is on a seperate board, so they could use an other connector (with an other formfactor) more cheaply on the same main PCB without redesigning the whole thing.
KnivD (pronounced "connived") is Konstantin Dimitrov, designer of the ELLO 2M board-stack computer, a PIC32-based portable computer made from six stacked PCBs and programmed in BASIC.
I had a Logitech X-530 2.1 system. Use to pick up radio stations. Believe it or not it was a lack of grounding on the transformer that caused it, or at least lack of grounding to the board since the cord is non-grounded. just attached a wire to the casing, attached the other end to the "ground" on the amplifier board with a resistor in seiries, it stopped receiving. Emerson was decent stuff, weren't the best quality but they work for years. The cd player has shock mounts because that radio probably has "anti-skip" which back in those days was just a term for something that was well shock mounted.
Possible asbestos in the triple adapter cable? It's the first thing I think of whenever I see 1930s onwards electrical stuff - I have no idea what it actually looks like.
DB25 on the sub board in the TV signal strength meter is probably fitted that way to allow different socket types to be fitted at manufacture without needing to respin the board for every type.
Perhaps they did not have the option to change the battery or the case design, and so was limited in how high the connector could protrude from the circuit board.
Wow Red Cameras are about as high-end as it gets with cinematography! This unit is technically charging what's called V-Lock batteries which are actually pretty common across most high-end cameras
I had two of those clock radios, which came from Walmart. One for the bedroom and one for the living room. They both failed within a few months of each other. One went wonky on me in the middle of the night and began throwing a squeal that morphed into a continuous alarm tone that was quite loud. The other just turned the radio on one day and the only way to turn it off was unplug it. So yeah, I can understand the "haunted" thing.
I forgot to mention that the CD players failed on both within six months after being used perhaps twice. Oh well, they were twenty bucks and purchased for an alarm clock.
Products like IntegriFuse are important because USB security sucks and it's pretty easy to dump payloads on a mobile device or have a compromised mobile device dump payloads on the machine it is connected too because USB was not designed for security(there are no USB firewalls!). I really don't know how good IntegraFuse specifically is so I'm not endorsing it beyond saying there should be a market for products like it(affectionately dubbed USB condoms). My other thoughts are maybe it should get a actual set of FBL fuses because USB 3.0 can do like a 100 watts of power in special modes.
I'd guess that having the connector on a separate board prevents damage to the main board if dropped while plugged in. Hot connectors on that charger. Looks like they rolled their own rapid charger.
I just trash picked an Agiflite camera. It is a 70mil film camera used in aviation recon. The foam in the case rotted so bad it has infiltrated every orifice. If it wasn't so heavy I'd send it for a tear down.
On a radio receiver there is supposed to be a band pass filter on the antenna input to keep the LO from leaking back out. Part of this filter has failed and is allowing the LO to leak out from the first heterodyning stage. If the radio was locked onto a channel the LO frequency would be more stable and wouldn't be hunting.
FYI RED camera gear are monstrously expensive, that charger costs $550 US without batteries witch are $450 each. they also sell "cheese plates" (square pieces of aluminum with 1/4" holes in them) for $275 and various semi propriety cables for $100+ they even sell a 6" bnc cable for $50 because its labeled as a "HD-SDI" cable witch is a protocol that runs over coax. their cameras are not that badly priced but they really kick the bucket in all the accessories that they make %3000+ profit on
Actually you want some bias when using that RF tool, so you would plug it in at the tv or as close to that as possible. If you do it from the roof, as you said it's minimal loss, the results would be better signal but the tv would have a harder time reaching those channels. Also you would compare it with and without the cable to tell if you need a booster or not.
AD5933, Man that IC gave me nightmares. it was a part of my final senior project in the university. and it was the first SMD component I soldered in my life. NIGHTMARES
Very cool to see that RED charger! I know a few people responsible for designing those and they don't mess around. That one is VERY old, you should see some of their new stuff, amazing engineering!
I suspect the connector PCB is to make it more flexible if they want to switch battery connector. Then you don´t need to remake the whole board. Another reason may be to get battery connector in right height...
11:00 I've decoded the binary it's transmitting on the scope, for some reason it keeps transmitting "Help Me!" so I don't know what that's supposed to mean, thoughts?
Thanks IntegriFuse for the 5 minutes of Benny Hill, haven't laughed so much since the 70's, so un PC today, most of the stuff in his shows you would wind up in court if you tried it today, and rightly so, just shows how times have changed. I think old Benny went to Oz to make his last shows after he had been deemed sexist old perv here in the UK. Ppl used to look down there noses when On the Buses and Benny Hill and old those old shows were still popular in Oz years after we had stopped watching them here, thing is it was probably all the ex pats wanting a bit of pommy humour to remind them of home, The Paul Hogan show was funnier than a lot of the crap the BBC put out in the 80's, it used to be on Channel 4 of a Friday evening here.
This cheap-built Alarm clocks was sold by Aldi, a big Supermarket chain.... They were banned immediately in case of jamming ILS Signals in Cologne and Duesseldorf Airport.
That RED charger is probably for NiCD batteries. Maybe that is why there were a discharge resistor and no LiIon charger chip. We had a V-lock battery bursting into fire at work when being charged on a similar charger. Exiting day. That was in the early 2000s.
Hello Dave, I gues you would want to check your camera's white balance nor your lab lighting. Its to shiney white than your other videos. Regards, Mehmet
That indiegogo campaign account is clearly hacked as the picture in the description is a common way to mark something has being intentionally altered without the intent of the original owner. This image btw: www.thecrowbarcdm.com/wp-content/uploads/2014/02/3050431703_SpyBlack_answer_2_xlarge.jpeg
Perhaps the connector was just a few millimeters too high, and would have caused a protrusion where they wanted to mount the battery, so they used this method to offset the connector a little.
the USB fuse, that is a terrible idea, for charging it is really important the phone know's what's it's charging off. Shorted data pins means it's a normal 5v charger, and will try to pull as much power as possible, if you do that off a PC you're gonna have a bad day. If you don't short them you'll only get 500mAh and it won't charge. I know my quick charge 2.0 charger communicates with my phone to deliver 9 volts @ 1600mAh, failing that 5v @ 2000 mAh. Not to mention it seems that one data line passes though anyway.
I believe the point of that thing was that you would put it on the charging lead of your phone or tablet if you are going to connect it to one of those public USB charging points. I suppose the idea is that since It is in theory possible that such a point actually has more than just a charger in it( and so could install something nasty on your device or steal data from it), you might want to break the data connection while still maintaining the ability to get power. Though how good that specific device would be, I don't really know, you would after all have to trust that it was not something nasty itself, and that it was not badly designed in some way. xD
08:00 I like this video but there are few inaccurate facts here. This is not a single layer board. IC's for CD player are on the other side wave soldered also common IF frequency in this kind if FM radio is 10.7 MHz not 455 kHz.
"Single layer" refers to the number of copper planes on a PCB. Assuming from your comment that we are still discussing the ghostly transmitting radio, it is a single layer board with a double sided load (not unusual where through-hole and SMD are mixed on the same board).
Dave its been long you did a review of products ..maybe do a 2016 multimeter shootout under 50or 100 bucks or maybe R&S vs Keysite Vs tek high end oscilloscope review
Only one fly in the ointment is the Philippino restaurant where you can have a meal of dog flesh which is against the rules in any civilized countries.
This Orange Pi is not worth getting yet, for the common person that only knows basic code. There is almost no driver support and you can't get them to fire up there is no bios to start from. It will not recognize anything. Not a keyboard not a mouse. I have 2 Pi 2's one wireless model and a Pi 3 with the works even has sata. Sadly I don't have the skills to program it.
Sorry about the foam in the case holding the RF Signal Strength Meter falling apart. It was not like that when I sent it to you. Thanks for a great tear down.
How many years ago did you post it? :)
Interesting. Not the first time it's happened. I'm interested to know who the transport causes this so quickly.
Got left in a hot transport truck maybe?
And started to decompose as a result? Yup, sounds quite plausible.
Hi Dave, thanks for including RoutaBoard in your Mailbag review. Those were the earliest generation samples which I sent you right from the first prototype batch (best suited for the museum now).
The recent model is improved with a better layout on the two sides, two more global buses, solder paste pre-applied over the contacts, so they can be bridged together by simply touching them with the iron. Still black soldermask, though. But point taken, I might try out a few different colours in the future, and see which one will work best.
Don't rush yet having a test go with the old ones. :-)
KnivD
I've got the newer version RoutaBoards and just want to say how fantastic I think they are! I don't think I'd ever use the software, although I have played with it out of curiosity, and I appreciate the effort that went into it. Still, this is, far and away, the most useful proto-board I've ever had the pleasure of building with. The manufacturing quality is top notch. I find they're even better for SMT than those shitty checkerboard PCBs you can get. SOIC and chip carrier packages fit perfectly, but anything smaller than 1.27 mm, and you're out of luck (not that you'll find boards like these that are so flexible in the first place). I really hope they catch on more and that you keep producing them. As you can see, I cannot recommend them highly enough.
14:39 I don't think that's a transformer tap but a glued on temp sensor ;)
Agreed.
As it's for a pro camera, chances are there is gas-gauging in the pack to tell the operator how much time is left, and do stuff like lifetime management. A bad battery on a film set could be very expensive.
THANK YOU! And this is why I have, since I was a teen, been completely ANNOYED by Gilligan's Island! There is no way a know-it-all "Professor" who could make batteries from coconuts and seawater would NOT KNOW you can make essentially ANY receiver into a transmitter simply by pumping more current through the local oscillator!
You have a radio that works!
You are supposed to know everything!
HOW DO YOU NOT KNOW TO SHORT THE EMITTER OF THE LO AND TRANSMIT CW ON AM BROADCAST?
Shortest TV series ever.
A while ago I was reading a story from the ministry that is responsible for tracking down radio frequency disturbances, and they found a similar radio with a similar error (though the story reads in the 180MHz range, might have been the harmonics though). All the story said was that some "components responsible for coupling the LO into the receiver failed, diverting the signal" so my guess here is that some rf related cap failed short.
+1 so Dave can see
Kind of poetic how we've been building radios for over 100 years now and yet it's STILL the darn capacitors that cause the problems? The more things change, the more they stay the same, right?
I thought about this for a while, and if they're using a notch filter on the input to keep the LO frequency off of the antenna, it could be that the LO has drifted a bunch.
If it's crystal controlled the crystal could be damaged, or the circuit could be just so drastically out of tune that the crystal can't pull it back into alignment.
If that's true than all the filters designed to block the LO frequency could still be doing their jobs and the signal from the LO would still get out since it's on the wrong frequency.
Went down the rabbit hole a bit on that one, but hopefully it's understandable.
I know just enough about RF to know that I don't know enough to be talking about this kind of stuff with any kind of authority, I'm just hypothesizing.
Of course it could also be something as simple as dried out power supply decoupling capacitors, a fact that jumped out at me since Dave mentioned that this was built in the early-mid 2000's. Those caps have been in service for 10-16 years by now, and that could by itself be enough to cause them to drift and/or fail if they're using whatever is cheapest at the shenzen market that week.
On another note, I'd bet this radio would have been tracked down as a noise source by some ham radio operator if left on long enough. It looks like it was putting out some serious harmonics well above the 95Mhz "fundamental" peak.
When I was 10 years old I tryed to "modify" a cheap FM radio by adding bridge wires to the circuit and turning the tuning coils. I had no idea what I was doing the the thing went totally crazy. I was able to jam most TV channels from 100 meters away with the radio. I wish I still had the thing to test it on my spectrum analyser.
The filter of the output signal processor of the Frequency mixer could be faulty. Meaning that the device is now transmitting the 4 different Frequency signals at the same time, and possibly at an amplified level, if the amplification section of the output signal processor is still working
The Multiplier component of the frequency mixer could also be faulty, in that it is not able to correctly tell the output processor how much amplification is needed from the data of the original signal
I'm probably terrible wrong, but what can you do..
"I was able to jam most TV channels from 100 meters away with the radio."
Some older computers had a similar effect in that the screens RF made sounds through the computers speakers because of the high level of/ poor RF shielding etc
I'd love to see the waveform from that mechanical inverter. Should try running something off it too.
agree
IF for FM is usually 10.7 Mhz 455 Khz is for AM
Beat me too it.
For another video, I'd love to see what kind of output that vibrating inverter puts out, and maybe compare with a modern inverter (modified or pure sine)
agree
"Dry as a dead dingo's donger." Looks like I've got a new favorite Aussism
I don't know about failure modes, but in my wild and careless youth, I had this habit of turning old superhet FM receivers into FM transmitters.
Long story short, even if you have proper variable caps for the tuning, you very often have varicaps for AFC. So, find the afc control voltage net, add a chain of components consisting of an RF choke, DC block cap and pre-emphasis network and apply appropriate voltage level signal and you have a low-power transmitter...
So if you go ghost-hunting on the clock radio, my chief suspect would be some component failure or crud in the LO signal net.
Ok I've watched your videos for going on four years now, and that dog device is by far the weirdest thing I have ever seen in a mailbag, well done lol
I'd love to see Dave make something on the RoutaBoard
Dave, Lancaster CA is about 65 Klicks north of Los Angeles. It is a true desert climate. It is not a place people typically aspire to live :)
Better than the 909 for sure though! :)
Did you say, "Dryer than a dead dingo's donga?" You're killing me! Keep up the good work. Thanks for everything!
Using a working radio and tuning it to the local oscillator of another one is a known old time trick used to check if the oscillator of a receiver you're servicing is running or not.
I think that Tektronix SignalMini was(and probably still is in some places) used by cable companies to determine if there is strong clean signal flowing through the cable line. I remember seeing my cable guy use something like that back in the day.
In that clock radio thing it looks like the front end amplifier has become an oscillator. Some of it's output energy is feeding back to it's input, and hence to the antenna.
Early transponders for military aircraft worked like this. They were basically an antenna connected to a tube amplifier that was on the edge of instability. When an RF burst comes in from the interrogator on the ground (or ship) the amplifier would go unstable for a short time, during which it transmitted back another RF burst at about the same frequency.
I liked the fact there was less commercial stuff in this one. A suggestion I have would be to minamise the commercial stuff which is probably impossible, however you could put it all at the end so it can be skipped if desired. Not sure if other agree, lets hear what everyone has to say on this =-)
What's the most well designed circuit board you've had the pleasure of inspecting?
Mate, you're a breath of fresh air to a jaded mind. The light side of youtube.
More please!
That Li-Ion professional camera battery charger is for V-Mount batteries, the batteries themselves have micros inside that can talk to the camera via different protocols (I2C, analogue etc) depending on the camera manufacturer, to report the remaining time by sensing current draw, autobalancing the battery cells etc. the chargers usually cost over 300 euros. and the batteries are also 150+ euros.
14:46 isn't that a temperature sensor?
For the radio, read the book Spycatcher and you will find a description of a technology to track radio receivers by LO emissions. Since spies don't want to be heard, they use a different frequency from the ones in commercial use. Spies typically would listen all the time and only transmit on cue or on time. thus the only way to catch a spy reciever was to listen for the LO emissions. Modern radio receivers would not likely emit the level of LO noise that old radios did though.
I see someone has said that "KnivD (pronounced "connived") is Konstantin Dimitrov" but I read it phonetically as "Nifty"!
I think the RF strength meter's charger socket's sub-circuit-board may be just a space saving measure. (Main circuit-board has the clearance it needs without one half of the outer-case becoming too deep.)
The connector on the TEK meter could be done this way because this product is pointed to different markets and different connectors may be suitable. Also, as a second idea, it might be done this way to recess a connector in respect to pcb to meet some height considerations.
Interesting to see that vibrator output on the scope))
agree
Dave, I think the interfaceconnector is on a seperate board, so they could use an other connector (with an other formfactor) more cheaply on the same main PCB without redesigning the whole thing.
"It's a mechanical vibrator..."
That isn't the vibrator that I thought it was.
Oh hello. ;)
Vibinator There you are! Come here you...
Michael Burke ok *walks to you*
[awkwardly long and discomforting hug between the two strangers Michael Burke and Vibinator]
Room for one more ChillCosmos...
I would love to see that Digilent impedance converter in action! Cheers
KnivD (pronounced "connived") is Konstantin Dimitrov, designer of the ELLO 2M board-stack computer, a PIC32-based portable computer made from six stacked PCBs and programmed in BASIC.
21:06 perfect for IC prototyping. Gotta get me a stack of those
I think the black wire between the two chips could be carrying a clock single (RC), and the wire it self is emitting (EMC) at this frequency.
I had a Logitech X-530 2.1 system. Use to pick up radio stations. Believe it or not it was a lack of grounding on the transformer that caused it, or at least lack of grounding to the board since the cord is non-grounded. just attached a wire to the casing, attached the other end to the "ground" on the amplifier board with a resistor in seiries, it stopped receiving. Emerson was decent stuff, weren't the best quality but they work for years. The cd player has shock mounts because that radio probably has "anti-skip" which back in those days was just a term for something that was well shock mounted.
I think it's the RF input stage that's transmitting. The LO should be pretty bang on, not all over the place.
It might be noise from an unshielded micro maybe?
Those peak from the radio look like harmonics. Might be something odd in the mixer for IF.
That Tektronix RF level meter is made by Promax Electronics Spain, probably Europe's no. 1 maker of RF analyzers and other related T&M equipment.
I'd love to see a Dave's go-to phrases quick list... Better yet, a Dave's phrases 'red easy button'!!
Hay the Micro on the RF thing is from Malta, :D Hi from Malta David.
APtech hi I'm going there in July
Possible asbestos in the triple adapter cable? It's the first thing I think of whenever I see 1930s onwards electrical stuff - I have no idea what it actually looks like.
Keep the videos coming Dave!
I want to see some DFT chip staff..maybe usefull for sound projects...rather than writing atmel assembly..
DB25 on the sub board in the TV signal strength meter is probably fitted that way to allow different socket types to be fitted at manufacture without needing to respin the board for every type.
or the original socket went EOL and they didn't want to respin the whole thing!
Other possibilities are is some mechanical issue with alignment or to make it easier to replace if damaged.
Perhaps they did not have the option to change the battery or the case design, and so was limited in how high the connector could protrude from the circuit board.
Wow Red Cameras are about as high-end as it gets with cinematography!
This unit is technically charging what's called V-Lock batteries which are actually pretty common across most high-end cameras
I had two of those clock radios, which came from Walmart. One for the bedroom and one for the living room. They both failed within a few months of each other. One went wonky on me in the middle of the night and began throwing a squeal that morphed into a continuous alarm tone that was quite loud. The other just turned the radio on one day and the only way to turn it off was unplug it. So yeah, I can understand the "haunted" thing.
I forgot to mention that the CD players failed on both within six months after being used perhaps twice. Oh well, they were twenty bucks and purchased for an alarm clock.
Products like IntegriFuse are important because USB security sucks and it's pretty easy to dump payloads on a mobile device or have a compromised mobile device dump payloads on the machine it is connected too because USB was not designed for security(there are no USB firewalls!).
I really don't know how good IntegraFuse specifically is so I'm not endorsing it beyond saying there should be a market for products like it(affectionately dubbed USB condoms).
My other thoughts are maybe it should get a actual set of FBL fuses because USB 3.0 can do like a 100 watts of power in special modes.
I'd guess that having the connector on a separate board prevents damage to the main board if dropped while plugged in.
Hot connectors on that charger. Looks like they rolled their own rapid charger.
Didn't get a chance to stand on a corner in Winslow :(.
I just trash picked an Agiflite camera. It is a 70mil film camera used in aviation recon. The foam in the case rotted so bad it has infiltrated every orifice. If it wasn't so heavy I'd send it for a tear down.
On a radio receiver there is supposed to be a band pass filter on the antenna input to keep the LO from leaking back out. Part of this filter has failed and is allowing the LO to leak out from the first heterodyning stage.
If the radio was locked onto a channel the LO frequency would be more stable and wouldn't be hunting.
FYI RED camera gear are monstrously expensive, that charger costs $550 US without batteries witch are $450 each. they also sell "cheese plates" (square pieces of aluminum with 1/4" holes in them) for $275 and various semi propriety cables for $100+ they even sell a 6" bnc cable for $50 because its labeled as a "HD-SDI" cable witch is a protocol that runs over coax. their cameras are not that badly priced but they really kick the bucket in all the accessories that they make %3000+ profit on
Actually you want some bias when using that RF tool, so you would plug it in at the tv or as close to that as possible. If you do it from the roof, as you said it's minimal loss, the results would be better signal but the tv would have a harder time reaching those channels. Also you would compare it with and without the cable to tell if you need a booster or not.
AD5933, Man that IC gave me nightmares. it was a part of my final senior project in the university.
and it was the first SMD component I soldered in my life.
NIGHTMARES
Very cool to see that RED charger! I know a few people responsible for designing those and they don't mess around. That one is VERY old, you should see some of their new stuff, amazing engineering!
I used that alarm clock for years till one day it decided to sag the power rail when the alarm was supposed to go off.
I suspect the connector PCB is to make it more flexible if they want to switch battery connector. Then you don´t need to remake the whole board.
Another reason may be to get battery connector in right height...
The output of the radio could be the LO local oscillator, 10.7MHz plus the tuning frequency..88.1 = 98.8MHz :)
IMO:The lithium charger has a thermistor and not the transformer tap with the Kapton tape.
it's clearly sending everything it hears to the NSA
11:00 I've decoded the binary it's transmitting on the scope, for some reason it keeps transmitting "Help Me!"
so I don't know what that's supposed to mean, thoughts?
Are you certain it isn't "Phone Home" instead?
Ethan Poole
It could be, depends on the dialect
Thanks IntegriFuse for the 5 minutes of Benny Hill, haven't laughed so much since the 70's, so un PC today, most of the stuff in his shows you would wind up in court if you tried it today, and rightly so, just shows how times have changed. I think old Benny went to Oz to make his last shows after he had been deemed sexist old perv here in the UK. Ppl used to look down there noses when On the Buses and Benny Hill and old those old shows were still popular in Oz years after we had stopped watching them here, thing is it was probably all the ex pats wanting a bit of pommy humour to remind them of home, The Paul Hogan show was funnier than a lot of the crap the BBC put out in the 80's, it used to be on Channel 4 of a Friday evening here.
the 'shaver' made me think of an old-fashioned movie-projector.
This cheap-built Alarm clocks was sold by Aldi, a big Supermarket chain.... They were banned immediately in case of jamming ILS Signals in Cologne and Duesseldorf Airport.
That RED charger is probably for NiCD batteries. Maybe that is why there were a discharge resistor and no LiIon charger chip. We had a V-lock battery bursting into fire at work when being charged on a similar charger. Exiting day. That was in the early 2000s.
There is "LI-ION BATTERY CHARGER" written on the device.
+kroplaaaa oh! Sorry :)
Make sure you keep that knife away from the little one.
Hello Dave, I gues you would want to check your camera's white balance nor your lab lighting. Its to shiney white than your other videos.
Regards,
Mehmet
The Sony I do talking head shots with it auto white balance (for technical reasons), but my main camera is colour balanced.
that 70's calculator looks like it came from a detectives office, especially with the wood trim. I bet its got a few layers of cigar smoke on it
Three minute teardown!
whould you be interested in a 1990s soundcard?
Cool, never seen a teardown of RED gear before!
my god that vibrating supply! that's actually kind of genius
You eat dinner with that knife? :-)
That indiegogo campaign account is clearly hacked as the picture in the description is a common way to mark something has being intentionally altered without the intent of the original owner. This image btw: www.thecrowbarcdm.com/wp-content/uploads/2014/02/3050431703_SpyBlack_answer_2_xlarge.jpeg
Maybe they just realized at the last second they needed that connector to go the opposite way around? :)
Perhaps the connector was just a few millimeters too high, and would have caused a protrusion where they wanted to mount the battery, so they used this method to offset the connector a little.
the USB fuse, that is a terrible idea, for charging it is really important the phone know's what's it's charging off. Shorted data pins means it's a normal 5v charger, and will try to pull as much power as possible, if you do that off a PC you're gonna have a bad day. If you don't short them you'll only get 500mAh and it won't charge. I know my quick charge 2.0 charger communicates with my phone to deliver 9 volts @ 1600mAh, failing that 5v @ 2000 mAh. Not to mention it seems that one data line passes though anyway.
I believe the point of that thing was that you would put it on the charging lead of your phone or tablet if you are going to connect it to one of those public USB charging points.
I suppose the idea is that since It is in theory possible that such a point actually has more than just a charger in it( and so could install something nasty on your device or steal data from it), you might want to break the data connection while still maintaining the ability to get power.
Though how good that specific device would be, I don't really know, you would after all have to trust that it was not something nasty itself, and that it was not badly designed in some way. xD
Routa PCB is AWESOME !
08:00 I like this video but there are few inaccurate facts here. This is not a single layer board. IC's for CD player are on the other side wave soldered also common IF frequency in this kind if FM radio is 10.7 MHz not 455 kHz.
"Single layer" refers to the number of copper planes on a PCB. Assuming from your comment that we are still discussing the ghostly transmitting radio, it is a single layer board with a double sided load (not unusual where through-hole and SMD are mixed on the same board).
Dry as a dead dingo's donger, i've got a new catchphrase!
Yep - fantastic 'stralian simile! One for the books!
Excellent thanks dave
Thats not a knife THIS IS A KNIFE
You remind me of " The head " from a British Television show from the 90s called Art attack
Sitting next to that knife makes you look like a dwarf.
you should probably make some "dry as a dead dingo's donger" tshirts if you haven't already
holy crap the switching noise!...
Dave its been long you did a review of products ..maybe do a 2016 multimeter shootout under 50or 100 bucks or maybe R&S vs Keysite Vs tek high end oscilloscope review
I still have a bunch of pocket meters.
I'd much rather visit Meteor Crater than go to Winslow to say I stood on a corner there. :p
Only one fly in the ointment is the Philippino restaurant where you can have a meal of dog flesh which is against the rules in any civilized countries.
Microchip have app notes with code for battery chargers ;)
ghost radio, my guess is the CD player spin up and down
This Orange Pi is not worth getting yet, for the common person that only knows basic code. There is almost no driver support and you can't get them to fire up there is no bios to start from. It will not recognize anything. Not a keyboard not a mouse. I have 2 Pi 2's one wireless model and a Pi 3 with the works even has sata. Sadly I don't have the skills to program it.
Best show on youtube.
Maybe I should send in my Creative 24/192 USB Dac that overheats and doesn't work, lol.
Can you make Microsoft HoloLens teardown? If not maybe someone can send it do you.
21:39 let's hear dave say diagonally once more :D
red cameras are incredible.
th-cam.com/video/Ag1w5XzB3ac/w-d-xo.html is probably a temperature sensor not the additional transformer tap
Hi Dave.
Bye Dave
Andrew, WA
David, "Click Here" in 19:32