So great. The original equipment is lovely but I think your build is equally appealing. I like to think about someone finding your vacuum tube tester in 50 years and making something useful from it again. I'm really glad I came across your videos. Thanks.
The chain drive is amazing. In radios from the 90's they used nylon string to transfer radio tuning rotation from the front panel to the variable capacitor, which from my experience loses tension after a time.
Heilman Hackatronics Yeah older gear needed a lot of mechanical engineering. I have an old radio from the 70s which has not just one, but several nylon strings, because the AM and FM range have to be adjusted separately. I repaired that unit (which involved replacing the variable capacitor) and I had to get the nylon strings in place again. Even though I had the original service manual,it still took my two hours or more to get the strings back in place. I guess I will show you that in a video some day.
The Post Apocalyptic Inventor It ' s impressive how all this has changed , for both good & bad , a lot more capability , a lot less repairable , an LCD display V a piece of string & a few bits of bent wire . Let us avoid the conversation over carbon content ,
"... an experiment I have come up with to explain the basic principles of the vacuum tube" turns on gas torch. What a cliffhanger. I can't wait for the next installment.
Nice... that freq meter yielded an awesome assortment of top quality hardware and parts, including the cabinet and front panel, for practically endless possible homebrew projects and possible support for other folks who need the rare parts, maybe to restore a freq meter they have that's just like it ... The necessity for the sacrifice is totally understood. :-)
Extremely thorough and concise explanations and some really quite dry theory brought to life, your channel is fast becoming my favourite electronic channel. Move over Dave Jones , there's a new guy in town, and he's ready for the apocalypse! Vielen Dank!
I have re-purposed a large number of older, tube lab equipment over the last 25 years but I have never seen a better designed unit as this one. It's truly a work of work of art. The engineering is in a class of it's own. What was the original use of this device? I would assume it to be some type of radio gear. You have unearth a virtual "tube" treasure trove.
bain5872 Have you seen part 1 already ? The device was used as a frequency meter in some test lab. It was operated in a sterile environment. There wasn't a speck of dust inside when I bought it four years ago.
The Post Apocalyptic Inventor Opps, I did not see part one but I will watch it for sure. Thanks for the background information. Again, truly wonderful engineering.
Don't worry too much about tearing down and repurposing older equipment. I have tried giving these things to tech museums and have had no luck. Dumping them into a private collection where they will never be seen again is equally useless. I bought an entire HP K580 series server farm, complete with the massive UPS this week at a junk yard for $0.25/lb. best $250 I ever spent (maybe but for a marriage license). The phone company just dumped it for $110/ton scrape. We live in a throw away society. Anyone repurposing treasure from the past is a hero.
Lawrence Bosse I'm totally on your side there. There is enough old equipment that is just gathering dust in some guy's basement. This way, people can at least see what's inside. That's a great score you made there :) . I have bought some UPS-units myself. Earlier or later there will be a video about that as well.
New motor run caps with a 300VAC rating will safely do 800VDC, I test them to 1kV as a test when new, and after a few years they will not pass this. At 1kV they tend to be a bit noisy internally, you can hear the internal arcing.
I worked in an electronics repair shop when I was in high school (early-mid 80s) and it's a shame to think of all the tube TV/stereo/turntable cabinets, radios and other equipment that I hauled off to the dump. It would have been nice to have a big area to store all that stuff in, but at the time it was considered junk.
ElectronSpark I guess that's still going on in some places. About 3 years ago, I bought some wire in a local shop. The shop was owned by a tv/hifi repair guy and he asked me what the wires were good for. After I answered him that I was repairing a 1970s hifi amplifier, he said they would throw away stuff like that. The device I was talking about was worth 200€ on Ebay and is considered a collectible item by many people around the world. I sold stuff like that for hundreds of dollars and send it away to distant places like South Korea and Russia, but the local technicians / electricians had no idea...
Will you ever continue on your SMPS tutorial series? You never explained how all isolated SMPS topologies work... Please contunue on those series, they are best, i learned a lot from them.
neclovekSK The thing is the following. I mentioned my "secret project" in one of my last video. The "secret project" involves some advanced smps-technology. While developing that circuit I too learn a lot of things about smps that I wasn't aware of before. Once the secret project is finished, I will definitely continue the SMPS-series. And it will even be much better than the older parts. because I myself had a long time to think about how to proceed. In the meantime I will only do teardwons and side-projects, which will also involve minor explanations of some toppologies. The explanation of the "half wave rectifier" in this video for example is at the heart of understanding smps. Some of the videos that will follow in the coming weeks will also involve some smps stuff + explanations. But as I said before I will not make tutorials in the classical sense in the coming weeks. I can't do that because it is a full time job and I can't afford that that time at the moment.
The Post Apocalyptic Inventor Great to hear you'll be continuing them when you have more time, I learned a great deal from those videos and appreciate the effort you put into your videos.
Your multimeter measurement at the end may be slightly dangerous. When you output 2kV you measure around 250V differential between capacitors which won't damage the meter, but at the high end, there's a common mode 2kV which could potentialy break down the lead insulation and get to your hand. High voltage mutimeter probes aren't too expensive (around 50 for a cheap one, 200€ for a fluke), they're basically a high value resistor and a lot of insulation on the end of a probe. e.g. www.rapidonline.com/Test-Measurement/High-Voltage-Multimeter-Probe-85-2216
+KX36 luckily he uses his isolation transformers which prevents the existence of ground referenced high voltages. When starting messing up with high voltages you might consider buying insulated gloves, I know they are expensive but can save lives. Nice setup by the way !
I really like your videos. By the way, It will be easier if you use small transformers for that HV generation. Example 10 pieces of 240/24 V transformers will do, 24V windings in series connected to mains, then 240V windings in series too. But yeah, work with what you have! Also, Don't forget to always bleed off your voltage cascade. :D
yup. I get your point, mate. if sacrificing this one machine saves others like it (historical machines, etc), then it's definitely a rational reason to do so. absorbing the algebra, turned off the part of the brain that controls the negative emotion, anyway. working/ building devices that reach such a high level of voltages, is certainly not for the fainthearted, man ;) oh aye....thanks for the brainfood btw!!
Sitze gerade hier in der Firma in unserer Azubi-Werkstatt und gucke youtube Videos :) Wir haben hier einen ganzen Stapel mit Rohde&Schwarz Messgeräten rumstehen, die ich Freitag noch in eine Ecke Verräumt habe, weil sie Bald weggeschmissen werden sollen... Eigentlich schade drum, die dinger haben sicher mal viele viele tausende Mark gekostet...
muh1h1 Schade. Frag doch nach, ob du Sie haben kannst. Dann kannst du auch mal reingucken, oder du stellst sie auf Ebay. Dann kann sie noch jemand anderes kaufen, der sich dafür interessiert. Alles wo R&S draufsteht lässt sich noch zu Geld machen. So etwas schmeißt man nicht weg !
Das gute ist, solange sich keiner beschwert, passiert hier in der Firma sowieso nix, bedeutet, die dinger stehen hier vermutlich in 10 Jahren noch rum :D Ich kann ja mal bei gelegeheit oben nachfragen, ob ich die dinger haben kann :)
***** Nothing special. Just an old cheap Ersa 25W iron. Been using it for 10 years. It's good enough for most things. www.amazon.de/Ersa-0920BD-L%C3%B6tkolben-Multitip-230V/dp/B0009QX1S8
![[MV] A leap of faith...ความเชื่อใจครั้งสุดท้าย (From "Petrichor the series")](http://i.ytimg.com/vi/U1piZH2CNXA/mqdefault.jpg)
So great. The original equipment is lovely but I think your build is equally appealing. I like to think about someone finding your vacuum tube tester in 50 years and making something useful from it again. I'm really glad I came across your videos. Thanks.
The chain drive is amazing. In radios from the 90's they used nylon string to transfer radio tuning rotation from the front panel to the variable capacitor, which from my experience loses tension after a time.
Heilman Hackatronics Yeah older gear needed a lot of mechanical engineering. I have an old radio from the 70s which has not just one, but several nylon strings, because the AM and FM range have to be adjusted separately. I repaired that unit (which involved replacing the variable capacitor) and I had to get the nylon strings in place again. Even though I had the original service manual,it still took my two hours or more to get the strings back in place. I guess I will show you that in a video some day.
The Post Apocalyptic Inventor It ' s impressive how all this has changed , for both good & bad , a lot more capability , a lot less repairable , an LCD display V a piece of string & a few bits of bent wire . Let us avoid the conversation over carbon content ,
@@ThePostApocalypticInventor Restringing dial cord is definitely NOT one of my favorite activities...
"... an experiment I have come up with to explain the basic principles of the vacuum tube" turns on gas torch.
What a cliffhanger. I can't wait for the next installment.
The build quality on that old device was amazing
Nice... that freq meter yielded an awesome assortment of top quality hardware and parts, including the cabinet and front panel, for practically endless possible homebrew projects and possible support for other folks who need the rare parts, maybe to restore a freq meter they have that's just like it ... The necessity for the sacrifice is totally understood. :-)
Extremely thorough and concise explanations and some really quite dry theory brought to life, your channel is fast becoming my favourite electronic channel. Move over Dave Jones , there's a new guy in town, and he's ready for the apocalypse!
Vielen Dank!
I thank you very much for using English language in these brilliant video my friend.
I have re-purposed a large number of older, tube lab equipment over the last 25 years but I have never seen a better designed unit as this one. It's truly a work of work of art. The engineering is in a class of it's own. What was the original use of this device? I would assume it to be some type of radio gear. You have unearth a virtual "tube" treasure trove.
bain5872 Have you seen part 1 already ? The device was used as a frequency meter in some test lab. It was operated in a sterile environment. There wasn't a speck of dust inside when I bought it four years ago.
The Post Apocalyptic Inventor
Opps, I did not see part one but I will watch it for sure. Thanks for the background information. Again, truly wonderful engineering.
This is a great video, I think I was holding my breath for 20 mins
Outstanding video, I'm looking forward to you next one.
Don't worry too much about tearing down and repurposing older equipment. I have tried giving these things to tech museums and have had no luck. Dumping them into a private collection where they will never be seen again is equally useless.
I bought an entire HP K580 series server farm, complete with the massive UPS this week at a junk yard for $0.25/lb. best $250 I ever spent (maybe but for a marriage license). The phone company just dumped it for $110/ton scrape.
We live in a throw away society. Anyone repurposing treasure from the past is a hero.
Lawrence Bosse I'm totally on your side there. There is enough old equipment that is just gathering dust in some guy's basement. This way, people can at least see what's inside.
That's a great score you made there :) . I have bought some UPS-units myself. Earlier or later there will be a video about that as well.
Just want to say thanks for all your great videos, and the quality of the content is just awesome.. Keep it up.
New motor run caps with a 300VAC rating will safely do 800VDC, I test them to 1kV as a test when new, and after a few years they will not pass this. At 1kV they tend to be a bit noisy internally, you can hear the internal arcing.
SeanBZA Thanks for the info! That's exactly what I wanted to hear :)
wow, a lot of effort went into this video. It is great !!!
I worked in an electronics repair shop when I was in high school (early-mid 80s) and it's a shame to think of all the tube TV/stereo/turntable cabinets, radios and other equipment that I hauled off to the dump. It would have been nice to have a big area to store all that stuff in, but at the time it was considered junk.
ElectronSpark I guess that's still going on in some places. About 3 years ago, I bought some wire in a local shop. The shop was owned by a tv/hifi repair guy and he asked me what the wires were good for. After I answered him that I was repairing a 1970s hifi amplifier, he said they would throw away stuff like that.
The device I was talking about was worth 200€ on Ebay and is considered a collectible item by many people around the world. I sold stuff like that for hundreds of dollars and send it away to distant places like South Korea and Russia, but the local technicians / electricians had no idea...
Can't wait, can't wait, can't wait, can't wait...
Will you ever continue on your SMPS tutorial series? You never explained how all isolated SMPS topologies work...
Please contunue on those series, they are best, i learned a lot from them.
neclovekSK The thing is the following. I mentioned my "secret project" in one of my last video. The "secret project" involves some advanced smps-technology. While developing that circuit I too learn a lot of things about smps that I wasn't aware of before. Once the secret project is finished, I will definitely continue the SMPS-series. And it will even be much better than the older parts. because I myself had a long time to think about how to proceed. In the meantime I will only do teardwons and side-projects, which will also involve minor explanations of some toppologies. The explanation of the "half wave rectifier" in this video for example is at the heart of understanding smps. Some of the videos that will follow in the coming weeks will also involve some smps stuff + explanations. But as I said before I will not make tutorials in the classical sense in the coming weeks. I can't do that because it is a full time job and I can't afford that that time at the moment.
The Post Apocalyptic Inventor
Great to hear you'll be continuing them when you have more time, I learned a great deal from those videos and appreciate the effort you put into your videos.
Great video! Keep up your great work!
Your multimeter measurement at the end may be slightly dangerous. When you output 2kV you measure around 250V differential between capacitors which won't damage the meter, but at the high end, there's a common mode 2kV which could potentialy break down the lead insulation and get to your hand.
High voltage mutimeter probes aren't too expensive (around 50 for a cheap one, 200€ for a fluke), they're basically a high value resistor and a lot of insulation on the end of a probe. e.g. www.rapidonline.com/Test-Measurement/High-Voltage-Multimeter-Probe-85-2216
KX36 Thanks for the advice. I was looking for a probe like that just the other day.
+KX36 luckily he uses his isolation transformers which prevents the existence of ground referenced high voltages. When starting messing up with high voltages you might consider buying insulated gloves, I know they are expensive but can save lives. Nice setup by the way !
I really like your videos.
By the way, It will be easier if you use small transformers for that HV generation. Example 10 pieces of 240/24 V transformers will do, 24V windings in series connected to mains, then 240V windings in series too. But yeah, work with what you have! Also, Don't forget to always bleed off your voltage cascade. :D
Very interesting. Question! Why no bleed resistors on the caps?
elboa8 Surely one of those things I culd have done to improve safety. Maybe I will add some later.
yup. I get your point, mate. if sacrificing this one machine saves others like it (historical machines, etc), then it's definitely a rational reason to do so. absorbing the algebra, turned off the part of the brain that controls the negative emotion, anyway.
working/ building devices that reach such a high level of voltages, is certainly not for the fainthearted, man ;)
oh aye....thanks for the brainfood btw!!
Sitze gerade hier in der Firma in unserer Azubi-Werkstatt und gucke youtube Videos :)
Wir haben hier einen ganzen Stapel mit Rohde&Schwarz Messgeräten rumstehen, die ich Freitag noch in eine Ecke Verräumt habe, weil sie Bald weggeschmissen werden sollen...
Eigentlich schade drum, die dinger haben sicher mal viele viele tausende Mark gekostet...
muh1h1 Schade. Frag doch nach, ob du Sie haben kannst. Dann kannst du auch mal reingucken, oder du stellst sie auf Ebay. Dann kann sie noch jemand anderes kaufen, der sich dafür interessiert. Alles wo R&S draufsteht lässt sich noch zu Geld machen. So etwas schmeißt man nicht weg !
Das gute ist, solange sich keiner beschwert, passiert hier in der Firma sowieso nix, bedeutet, die dinger stehen hier vermutlich in 10 Jahren noch rum :D
Ich kann ja mal bei gelegeheit oben nachfragen, ob ich die dinger haben kann :)
The older tube type stuff produces a lot of waste heat.
For no other reason it should be retired or used rarely.
Perfect
Top man.
Which soldering iron are you using?
***** Nothing special. Just an old cheap Ersa 25W iron. Been using it for 10 years. It's good enough for most things. www.amazon.de/Ersa-0920BD-L%C3%B6tkolben-Multitip-230V/dp/B0009QX1S8
Great job destroying a nice radio!
Yee ha!
Thank you Post Apocalyptic Inventor eh... Ü