0050 This is the best packing material I've ever seen!
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- เผยแพร่เมื่อ 5 ก.ย. 2024
- On today's SMMC, we have a neat assortment from viewer Ted. He sent along some disks but also included some other fun items as "packing material."
-- Video Links
Adrian's Digital Basement Merch store:
my-store-c82bd...
Support the channel on Patreon:
/ adriansdigitalbasement
Adrian's Digital Basement (Main Channel)
/ @adriansdigitalbasement
-- Tools
Deoxit D5:
amzn.to/2VvOKy1
store.caig.com/...
O-Ring Pick Set: (I use these to lift chips off boards)
amzn.to/3a9x54J
Elenco Electronics LP-560 Logic Probe:
amzn.to/2VrT5lW
Hakko FR301 Desoldering Iron:
amzn.to/2ye6xC0
Rigol DS1054Z Four Channel Oscilloscope:
www.rigolna.co...
Head Worn Magnifying Goggles / Dual Lens Flip-In Head Magnifier:
amzn.to/3adRbuy
TL866II Plus Chip Tester and EPROM programmer: (The MiniPro)
amzn.to/2wG4tlP
www.aliexpress...
TS100 Soldering Iron:
amzn.to/2K36dJ5
www.ebay.com/i...
EEVBlog 121GW Multimeter:
www.eevblog.co...
DSLogic Basic Logic Analyzer:
amzn.to/2RDSDQw
www.ebay.com/i...
Magnetic Screw Holder:
amzn.to/3b8LOhG
www.harborfrei...
Universal ZIP sockets: (clones, used on my ZIF-64 test machine)
www.ebay.com/i...
RetroTink 2X Upconverter: (to hook up something like a C64 to HDMI)
www.retrotink.com/
Plato (Clone) Side Cutters: (order five)
www.ebay.com/i...
Heat Sinks:
www.aliexpress...
Little squeezy bottles: (available elsewhere too)
amzn.to/3b8LOOI
--- Links
My GitHub repository:
github.com/mis...
Commodore Computer Club / Vancouver, WA - Portland, OR - PDX Commodore Users Group
www.commodorec...
--- Instructional videos
My video on damage-free chip removal:
• How to remove chips wi...
--- Music
Intro music and other tracks by:
Nathan Divino
@itsnathandivino
"RAMSIC" is probably a pretty good self-diagnosis for that machine. And the glitches were hilarious :)
I've said this before, but I think it bears repeating: I really, really appreciate your video format for mail call items. It's really gratifying to be able to see a contiguous bench demo of items as they come in, even if only for a short confirmation of any faults they may exhibit. I know it must be a lot of work to present them in this way but it really does hook me as a viewer, and it helps set your channel apart from others. Keep up the great work, and know that it is much appreciated.
Thanks. Indeed seems list most of the other (larger) channels only briefly show items, but it seems people seem to appreciate actually seeing stuff work, if just a little bit. If it's a repair item, I need to test it out anyway, so I might as well make a quick video about it. :-)
You should DEFINITELY use the Tektronix to repair the C64: Then they can both be used for what they were made for: The Tektronix for repairing faulty computers, and the C64 for being repaired. :)
EDIT: By the way, that Tektronix portable scope was very likely using bleeding edge low power and portable technology for 1995. That LCD would have pretty much been as good as it got back then. You could maybe replace the mercury (most likely) backlight with an LED backlight and it would dramatically improve the viewability of the display.
Actually, given the blue-green glow of the screen, the backlight is most likely EL, not fluorescent. I'm not sure how the power consumption compares with CCFL, but there is no mercury involved.
@@michaelcalvin42 That's what I thought as soon as I saw it too, has a very characteristic colour.
Having worked at RadioShack from 1999-2005, I can confirm that around that time, they made a deal with RCA to sell RCA branded TVs, VCRs, and DVD players. Granted, by this time, RCA was a shadow of the company it used to be. But yeah, it was a thing.
The portable TV might be useful if you're out thrifting and want something pocket-sized to test anything you find that has composite output. You know, in those situations where "not working" is a deal breaker. And where they don't also have at least one working TV for sale.
In Tek's defense, good commodity rechargeable cells weren't as ubiquitous as today. Their concern was likely that people would try to put alkaline cells in it and blow them up.
Heh indeed -- being such an old device, I am not sure Lithium Ion batteries were common then. Tek probably wanted to avoid cutting edge stuff and rely on what they knew worked.
@@adriansdigitalbasement2 in the early to mid 90s Sony basically still had the defacto monopoly and charged a ton extra.
According to Sony, the big battery players had only just gotten NiMH on the market by the late-80s, and Sony couldn’t find anyone who wanted to partner with them for their new lithium charge controller design (which resolved lithium’s limited lifetime and overcharging issues). They allegedly told Sony to wait 10-20 years so they could get their investment back.
But Sony being Sony they wouldn’t settle for less in their camcorders, and just invested enough in building whole new battery factories over the next couple years! The few laptops which used Li-ion in the early-mid 90s (like PowerBooks) all had Sony cells, and because they were so pricey (and had some early issues with fires..!) plenty of companies kept away.
I can easily imagine TekTronix choosing to stick with NiMH or maybe even NiCd with known performance characteristics rather than take the business risks. (Especially at their inflated profit margin…!)
This is also why we’ve only just started to see lithium-ion AAs and AAAs, as NiMH was cheaper and they found a niche they could recoup some investment in. The lithium ones are still a bit pricier, though I wonder how long that will last. It’s possible when my Eneloops die they’ll be replaced by lithium.
I used to work for Radio Shack, and Radio Shack in earlier days had their own brand names that were rebadged products they bought from Pioneer or Casio, in later years, they were selling brand names along side their own 'branded' products, but by then, RCA had gone belly up, and it's IP was bought up, and then licensed out, so this was probably a TV spec'd by Radio Shack, and then manufactured in China, but branded RCA because Radio Shack had been licensed to put out products under the RCA brand name. That's my guess. Ironically, Radio Shack went belly up, and now their IP is used to push still more Chinese electronics.
I remember in the late 90s or early 00s seeing a lot of RCA branded stuff in Radio Shack. They had some kind of special deal, I think trying to get away from the RS "generic brand" products.
Yeah, it was Optimus in 98 but RCA in 99. So most of the RCA stuff is from like 00-03 or maybe 04. I know they still made some cable boxes and stuff around 04.
The last time I played with Tektronix stuff, it was their solid state ink printers. The ink cartridges were chunks of solid CYM-K wax that were melted and then used to print on paper. The cool part was that the 'ink' was crisp and water resistant
I maintained one of those in the past, too, but the product line (Phaser) had been sold to Xerox by then.
That Radio Shack TV (Tandy Corp bought the RCA name in the early 00s) just unlocked a buried memory!
Your comment about the tuner line reminded me of a parent’s bright yellow mid-90s LCD portable TV, but the channel selector was on the right and it had a green horizontal line instead of a red vertical one. Exact same system though, and it was only visible in radio mode or if it couldn’t lock on to a TV picture.
I’d use that thing to watch TV in the car sometimes on the way to school. If I wasn’t playing Pokémon…!
We have one of these scopes at work, i did rebuild the battery pack a few years ago when it still was in daily use and you couldnt buy a good spare anymore. Its 4 flat-top C cells.
The best feature on these is that the inputs are isolated from everything, including the other input, so you can clip the probe "ground" on different potentials, even fast-edge ones. You should really use fully-isolated probes though.
We now use a fairly new R&S 4-channel isolated scope that is, well, 25 years younger and so much better in any respect, so the tek collects dust and will eventually get thrown out.
I was really impressed with the video quality of the tiny TV. It looked like it had decent color, and I didn't notice any ghosting of the LCD. If that was a TFT display, that's quite impressive.
It's really too bad the screen couldn't be transferred into the Tektronix. That'd make for quite the upgrade.
@@bruwin you could upgrade the screen in it but the problem still lies with the cpu in it
That’s because it was from the early-00s :) by then that had gotten pretty decent.
The video almost looked good enough to be an overlay in post. :-)
Exatly so, Adrian. Back to basics! C64, C128, Atari and Amiga. That is what makes our souls tick right now. ❤ All your “amateur” oppinions and thoughts is exactly what we want!! It is probably boring for you now, but I’m sorry. We love when you just do your magic! 😅❤
Yeah!
It’s so funny Adrian, how you said this is not going to be a repair video but you could see it was killing you not to troubleshoot that C64. 😂
Especially with some obviously suspect chips on the board (the MOS 74xx in particular).
MUST. RESIST. THE. URGE. :-)
tektronics scopes are serious gear, no matter when they were made and what form factor.
the Tektronix ths720a price was about $3200 new. You can get one used for $150-250 on eBay.
They're stupidly expensive on UK eBay, from £350-700 unless you buy them from sellers in Israel, but I've never known anyone buy test equipment from Israel that hasn't been damaged somehow, even if they are honest about that in the listing. I guess in the US there;s a much better supply.
I've been going for work to Singapore for years, and remember drooling over these Tek scopes as an alternative to Fluke which was completely out of my budget. In the end, I had to admit to myself, I just couldn't justify the price, and any customer I visited usually had a much better O'scope they could wheel up to the machine if I /really/ needed one [I work in semiconductor manufacturing]. I still felt that wash of excitement as you pulled the scope out of the bag. Thanks for the trip down memory lane... from my hotel in Sicily!
These scopes are going for about $350 to $750 on Fleabay. That's pretty steep considering you can get a new Rigol 200Mhz bench scope for $300 shipped to your door. Probably more to do with Ebay than anything else. Still it's a cool scope and the one Adrian received is in mint condition.
Tektronix is 'the' brand to be fair, and people would probably trust their readings/robustness/longevity/safety/etc more.
It could also be people buying them that are used to those controls, or just aren't aware of the low cost of new devices.
3740 refers to the preformatted format. in this case, it's the standard IBM 3740 format (the IBM 3740 being a keypunch replacement that used floppies instead of punch cards), that is, 77 tracks (73 + 4 spare), 128 bytes per sector, 26 sectors per track, giving a total of 256,256 bytes of formatted storage. Each sector is filled with the byte 0xE5 (which IBM deduced was the most complex byte to encode using FM aka 0,1 RLL encoding), and these disks can be used as-is with operating systems like CP/M and ISIS-II, which expect the disk to be in this format. (in fact, CP/M disks are formatted completely blank, using this exact fill byte in every case. The BDOS uses this byte to check if a directory spot is empty.)
the single and double sided 8" disks, unlike 5.25" disks, can't be used interchangeably (the index holes are in different places for both), so you MUST format these as single sided, if you wish to use it.
Excellent Nerdage, Sir 👍
@@tschak909 You can cut the extra holes with a hole punch if you're careful... though strictly the second surface may not be 'certified' 😕
BTW: DON'T punch both holes at once thru the disk proper! ;-)
@@RogerBarraud indeed, but boy howdy, is it not for the faint of heart. ;)
I still think of things that came out in 1995 as cutting edge. Adrian: "This thing is 27 years old!"
Now I feel old 😂
Used to use portable TV at airport waiting for my flight. Worked on Baltimore stations at BWI and DC channels at Reagan & Dulles.
You can get those batteries on eBay for about $20-30
The little TV would be handy if you just want to see if a console or computer works, especially if you're not at home or don't want to crawl about behind someones widescreen.
Awesome scope - and I love Tek equipment - used a lot of it in the past and it's all built like tanks... (some of the really old Tek stuff had all gold contacts and really incredible construction!) - thanks as always for a great video....! (I continue to learn a lot!)
It is amazing how far we have come with display screens in the last 30 years. We take for granted now our screens on our phones etc... but it was not always like that not that long ago!
The little RCA tv looked good. As I’m watching this on a modern Smart Phone.
I suspect that since it has charging circuitry in the scope one motivation for having a proprietary pack would be to ensure that you didn't put in alkaline C cells and then try to charge them in the unit.
Yeah, that's probably also a big reason why most rechargeable batteries are nonstandard in shape, and why devices designed to take anything standardized don't have built-in chargers.
You could very slightly modify this design to make it so that you can:
-Run off the provided pack
-Run off D cells
-Only allow charging when the rechargeable pack is installed
You just need to move the contacts on the battery pack so that they aren't in the same place that the contacts on the d-cells would be.
The reason the BNC jacks are plastic is not for high voltage. All inputs are isolated, even the DMM input. Even when charging all inputs are fully isolated. That's the reason I still use this 25-year-old scope.
I like how you use that scrounged cable that "should? hopefully? activate the audio/video" (28:18) instead of just using the cable that came with it. (13:44)
(Yes, the cable that came with it is notionally an audio cable, but it's exactly the type of cable that the manual suggests. It even says white is video and red is audio.)
Love all the cool things you get in your mail calls. Thanks for sharing
I use the Tektronix scope for the same reason: testing unknown circuitry with high voltage.
I made a replacement battery myself from spot weldering NiMH C battery cells, but after that I noticed that replacement batteries are still available from third parties. Look it up at Amzn!
Congratulations for your "new" THS 720! I once bought two of them at a military surplus auction. I gave one as a departure gift to one friend of mine, as he was leaving the company. I kept the other one and still have it. Actually my troubles have been what you already suspected, the battery pack. If I recall, the pack does not use exact C-cells, but slightly shorter ones.
Your suspicion about the isolation is, as far as I remember that the charger and external battery connections are well isolated from the scope probes. However, the two probes are only isolated up to +/- 15 V from each other. You should check these from the specifications, just in case my memory is failing me. My excuse is that I also have one Fluke/Philips battery operated scope that also has had battery issues, although it can use ordinary alkaline batteries optionally. Otherwise, the THS 720 works great for me and I have not noticed disturbing amount of slow response. Well, beyond the issues that some screen movements are tied to the trigger, which on a digital storage scope may appear misleadingly slow, depending on the modes and horizontal scale selections.
Fluke scopemeters are still being sold and used today. They are around the same size as the Tektronix one you have there, but better in specs i bet. I use a two channel Fluke scopemeter to this day.
But Tektronix was the king of o-scopes back in the day.
I freaking LOVE repairathons
I seem to recall back when 5 1/4 inch diskettes were popular, in the 1970s, you could turn a single-sided disk into a double-sided one by simply cutting a corresponding notch on the sleeve. I wonder if that could be done with 8 inch diskettes as well.
I'd have saved that foam insert at least long enough to fabricate a replacement one, since it was perfectly shaped for holding the scope and accessories.
And you could probably fabricate a tubular battery pack to fit into the scope, something you could charge with whatever charger you have on hand. (nowhere as crude as the way I made a 'battery pack" for some cheap portable cassette player by poking wires into a blister pack of D-cells).
I have one from 1999. I used it for my IT work. I have 200mhz. New it when over 2,000.00
That little pigtail with the two RCA sockets on it might just belong to the little RCA TV.
Looks like the LCD TV DC in is a standard 5V connector like the ones you have on the Sony PSP (you can easily find USB to DC cables to use with a smartphone USB AC/DC power unit) or on a lot of portable Mini Disc players.
That Scope is Dope 🤩
I fixed a techtronix 214 and just put all new nicd batts in it. Still readily available. The 214 needs the batts as a capacitor. Won’t even run when plugged into the external a/c without them. Also had shorted tantalums.
In defense of the Tektronic "only use our batteries" line. There is a very good reason for that. If you could put regular batteries in there, and attached a charger to the system, the regular batteries would leak or explode (in a mild way), ruining your expensive scope. You cannot recharge regular batteries, you can only recharge "rechargeable batteries", it's in the name! Even rechargeables are different in their charging characteristics, and require different chargers.
For example, Lithium polymer batteries should not be charged with a regular lithium ion recharger, even if they operate at the same charging voltage. LiPoly require a slower charging method, and can be damaged if charged by a Li-ion phone charger, for example.
Yes but they could have skipped the recharging part altogether and just go with C batteries.
It would have been easy to leave the side contact where they did for the rechargeable pack, but also added a contact on the top that didn't try to charge regular C batteries. Back in the day, I would have appreciated being able to use normal batteries in a pinch.
Adrian, in the late 1990s, early 2000s, RadioShack had an agreement with RCA, to sell their products, instead of the Shack's superior Optimus (made by JVC and Aiwa, IIRC) electronics. To say it went over like flatulence in a Fiat would be an understatement.
With the increasing amount of old TVs and analog stuff you have been showing, you should have called this second channel Adrian's Analog Basement. Haha
You know, maybe one reason they don’t make the battery compartment compatible with standard C cells isn’t just to make you pay for spares (though I’m sure that’s a nice side benefit), but to keep some knucklehead from putting alkalines in there and having it attempt to charge them.
I had that oscilloscope and with new firmware it was working much better.
One of the first devices that grows over time.
But I had to give it to the service every time.
After that I had a color fluke what a difference.
"3740" is the IBM number for the original SSSD 8" floppy drive.
And that C64 is the perfect degree of broken for a repair episode... working enough to respond to the keyboard, but still doing weird things!
Hah! I used one of those Tek scopes at work somewhere - I forget exactly where.
Really good 'scope - like pretty much all Tektronix stuff.
All inputs of the THS700 series oscilloscope are isolated from each other. So, you can measure mains power line without using high voltage differential probes.
Oh that's awesome. Better than any other scope I have right now.
My gut on the 64 is either the mos Multiplexers. Or the static ram.
Batteries are easy to do and can be upgraded while you are at it. I did this on one of my videos on the 486 laptop
Just scrolling idly through a seller's joblot items on ebay, and there was a Casio TV in one of their joblots that is identical to this RCA one (bar the lack of VHF tuning, owing to it being a PAL model), googling "casio TFT TV" and it seems it's an EV-660 series (there's letters that denote the versions on the end of the number), so yep, it is indeed a Casio made for Radioshack branded as RCA, talk about identity crisis... :P
Haha indeed. Yeah the little set screamed CASIO so I'm not surprised it turned out to really be one.
Yeah, sometimes you just recognise something straight away even if it's branded as something else, it was just pure coincidence I saw that actual Casio one in a joblot so soon after your video... :D
26:54 I have three C batteries from Philips with the expiration date 1977 and those are not leaking, but Duracell will leak even before the expiration date.
Alright, some Commodore stuff again...okay, I know it was one item but I'll take it. -Mark.
Dysan were the Gucci of floppy disks....
The stereo/mono cable tucked into the TV's carry case that you tossed aside was probably used for the TV's A/V input by the former owner.
That is what it was.
You could use a 12v security camera battery pack to power the scope, they can be found on ebay but I am don't trust the capacity claims.
In the late 90's I worked at Lucent in telephony. I had one of those portable Tek scopes as applications engineer. I can't remember what we paid - if I had to guess I would say $4000 but really don't remember. The display was not great.
I know what you meant by making sure of the center pin on the power input. I used to have an GE Help Full Power 40 Channel 2-way Emergency CB Radio Survival Gear Portable, and I was running it off of AC with a 12 volt adapter with changeable plugs, and one day I was in a rush and grabbed the wrong one that ended up running 12 volts DC to GND, and GND to the 12 Volt DC. Turned it on, and the whole thing GLOWED for 2 seconds before it did it's Marley impression and became as Dead as a Door nail. Whoopsy.
So that TV is from back when RCA entered into a deal with Radio Shack to sell retail electronics at RS. That's why it's not an RS brand. It was also around the time that RS was trying to become less of an electronics hobbyist store and more of a retail store like Best Buy. Except that wasn't what people went to RS for, and none of their stores had near enough shelf space to support being a retail store like that. I believe it was shortly after this that they started pivoting hard into cell phone and accessory sales because that was something they had the shelf space for. But it was still far too early because this was before smart phones.
Those days were sad.... A store selling that stuff might have worked in small towns if it weren't for Walmart being in every small town. I assume the only customers you might get in your Radio Shack were older people who needed to buy a phone charger. Radio Shack was amazing for the time it existed, but the writing was just on the wall for that type of store.
Not sure on the cost of that Tektronix Scope. But I used to use the Anritsu one back in the early 2000s at work. And it's base price was $13k for the battery powered version
That scope is super sweet! Gotta do a repair using it. Looks like you can grab that scope from eBay. You may have just caused a stir.
I think that two lithium titanate battery connected in series would be perfect for that scope. One downside is that they are hard to come by in smaller dimensions.
Given the battery pack when fully charged is about 4.8v, and a typical Li-Ion is 4.2, if you used some 26500 cells (C-cell size) in parallel, you could make up a stack that would work in there, though would need protection & balancing circuitry too, which could make it a bit more complicated I suppose... :\
Or stack up four NiMH AA cells, they probably have as much capacity as the original C cells.
I bought one of those TEK scopes recently. I need to rebuild the battery pack As they are about 100$ new. And that is rather expensive for a NI-CD battery. I paid about 57$ for the scope. Second hand of course. It is in decent condition and just needs a clean. but still works great! The seller said channel one needs to be calibrated, But it does not. The original owner used a really small power supply below the rated voltage and current. Witch caused readings to be inaccurate. But the seller might have not set it up properly either. I did come with one of the original TEK probes but it is missing the clip bit that connects to it. But that is alright. I can Just buy a new one. My one is also missing the rubber battery cover but thankfully I still have the metal part of the cover. So the battery will still stay in there. It was a bargain though. And it is still one amazing scope!
Add a jumper wire from the middle contact to the battery housing lid. Then just use any C batt.
::Turns C64 on::
"SIC V2"
Indeed.
Just noticed the RCA portable tv and i think that was the Casio EV-660 model rebranded...
100% you're spot on with that. Rebranded and labelled for sale at Radio Shack. Wonder why they didn't stick with Casio branding or even put Realistic branding on it....
Yeah, that "RCA" "Radio Shack" TV is _very_ Casio lol. I bet it even has what I now call -- specifically because almost all of those dang portable 80s/90s TVs used it -- a "Casio Pinout" barrel jack, namely center NEGATIVE. I don't know who came up with that idea but I suuure want to dope slap em. LOL.
To echo a few other commenters, your best bet to replace the battery in that scope are NiMH cells. I've replaced NiCd with NiMH on a couple machines from that era (HP 200LX and IBM Thinkpad 701c) without any issue and with no need to modify any circuitry since NiMH operates at the same 1.2 volts and charges the same way. Overall that scope is really cool. I'm tempted to pick one up for myself.
I almost bought one of those oscilloscopes on eBay half a year or so ago. I read that the refresh rate on the screen was really slow and I was concerned about how well it had aged so I wimped out and spent a little more for a new Rigol.
I used to rebuild those batteries at a previous job, apparently they are still in use.
I'd really like to see the video trigger functions in action on a C64, Amiga or old consoles like the SNES (which is supposed to be 240p).
I'll need to give it a try as my only other scope to do it (the Rigol) never seems to work right.
31:14 - record this to VHS also for the next mini tv video?
Haha Perhaps. I picked CRT related videos when making that tape :-)
The 3740 refers to the IBM 8in 3740 standard for disks Call it the Original 8in format SSSD.
A few cells and shrink wrap
The Kirkland AAA batteries are the worst leakers. They leak new in the package even when they are dated to be good many for years in the future.
The Kirkland cells are no worse(or better)than modern Duracells-both leak way more often than they used to, and are more likely to leak in the package as well.
The reason that they are both equally bad:Duracell makes both brands.
They probably want you to use their power pack because the system is measuring the voltage from them to give the low battery warning and if you don't use NiCad then the voltage will be significantly different. Can't have users not getting the low battery warning at the right time can they?
Time is my only enemy.
Would you have over the air broadcasts for the little tv to find these days??
I still have my Textronix handheld, i use it occasionally and modified it to run of a USB power bank.
Yeah I was thinking a USB Type-C cable would easily work for it
I still use my Tektronix 4 channel scope from the 90's , it has a floppy disk drive if that gives you any idea
Like McDonald's.. I'm lovin' it.
The RCA TV very much looks like a rebranded Casio, even before it was switched on.
I once had a generic 386 clone laptop (I think it was made by Compal) that used an almost identical battery pack using C cells. The pack was dead, and replacement industrial-capacity C cells were way too expensive for something I was just messing about with, but it would run for 15 minutes off ordinary consumer NiMH cells.
Had a look on ebay they where selling the tektronix scope batteries for about 40 dollars
26:00 Modify it with some Li-Ion Cells ;)
That poor TV, endlessly searching for broadcast signals that will never come again :(
Haha -- yeah. I should have fired up my RF modulator which does provide a local broadcast so I can properly test TVs like that. I just need to fix the power supply for the modulator and this TV had the video input.
You will charge the battery pack on the bench and let us know please ?....cheers.
Dont underestimate the 720, i have been using mine for 20 years, its only this year i splurged on a Rigol.
"Weeellll hello everyone!" ☠
3740 is an IBM designation.
probably those MOS logic chips.
I wonder if Batteries Plus could make a new battery pack?
33:25: _Last Chance to See:_ The cosmic microwave background. Kids these days can no longer just toggle a switch on a box they have at home and observe the echo of the Big Bang.
I remember watching a science program as a child (Nova, I think) and they showed how you could use any regular TV to see the cosmic microwaves from the big bang, and it blew my mind and stuck with me for the rest of my life.
@@adriansdigitalbasement2 I have this vague image in my head that there might be a digital receiver out there that supplies a fake CMB if tuning into a channel doesn't work, but I'm not sure if I saw that somewhere of it I'm imagining things. Either way, it wouldn't be the same. That said, I do make allowances for HBO and the MiSTer, both of which use a fake CMB for effect.
22:27: With that 320x240 screen resolution, I wonder if that scope has a VGA-out option and if it would output mode X or 640x480 on an external CRT. Are all the ports on that thing identified and accounted for? Even if this doesn't have that, there has to have been a hybrid scope with an actual docking station back in the day. If anyone knows, please share.
You can still buy those battery packs!
connect a wire from the ring to the top cover then?
I never had one myself but a friend of mine picked it up for 20k don't know if that's second hand market or new
If that scope has an output for an external display you should try that and see if it's faster, because even though it can do 25fps the display looks like it's only doing 2fps - lol -.
Also this TekScope has isolated channels.
Try rebuilding the lack with nickel metal hydride cells they use the same charging circuitry as nickel cadmium.It