Видео

We all have them days!!!

Repairing old test equipment is as much fun as repairing American 6 am rigs. KA0VSL.

Really think this was not a bad video. Lots of info made available.

Very Interesting Fred, I never knew of the 3 balance arms... Great stuff!

Most V.T.V.M.s were designed to be used in the upright position, any other position wold cause problems from the heat of the tube(s). Yes I have several (no Heath) on my bench. Ran a B & K 177 at the stereo repair shop until it closed in 2000. Thanks for the video.

Misteaks?

It's OK, I think you do a fantastic job, and I know how it is with working on this stuff and making mistakes and such.

I was going to comment on the lithium batteries as well, I do this every now and then when I get such little sets, I buy up laptop replacement cells cheap on ebay and tear them down for the cells. Great place to get some working batteries on the cheap.

Fred- There was great information in that video- Just because a frame or two gets blocked doesn’t impede the information from getting through. It’s not easy trying to teach while doing and filming all at the same time. 😃👍

The meter was surprisingly clean inside compared to how filthy it was outside. I’m not sure why but vintage HeathKit stuff is through the roof right now on eBay. Fred- What kind of maniac doesn’t love old multimeters?! 😂👍

You should watch your own video before publishing it. Just sayin'

Good on ya that you didn’t edit out getting shocked, it’s easy to make a small mistake and get bit (speaking from experience)… a reminder to all of us that electricity is unforgiving of mistakes.

Looking forward to the restoration of the VTVM! About me: my name is Karl, I’m a 54 year old HVAC/R mechanic, slowly retiring out of the trade (because I don’t really care about furnaces and air conditioners and commercial refrigeration anymore), I’m currently renovating my house and shop (in Alberta Canada), and part of the renovation plans include a dedicated space for my electronics bench, I’m working towards building up a “retirement” business that specializes in restoration of 1960’s - 1980’s hifi and guitar amplifier restoration/repair. Thankfully I own a decent sized shop, because currently I am storing about 75 pieces of gear, GE tube and solid state, AKAI, Sansui, Technics, Telefunken, Realistic, Pioneer, etc. that all needs restoration… In addition to Mr. Carlsons Lab and Shango066 I would encourage everyone to check out XrayTonyB’s channel, great in depth restorations on his channel. Thanks.

That AMC radio may have been made by the Japanese OEM, "Hokuyo". There may even be an "H" symbol with their company insignia on the speaker or tuning capacitor or even elsewhere in the radio. Hokuyo built billions of radios and other consumer electronic devices for various companies worldwide.

Got Zenith radio broke it in 1965 got it working in 20022 kool kg6mn

I've a bunch of old radios.There are ham transmitters, transceivers, and receivers, along with old AM & SW sets. I like the radios from the early 40's, I've a Motorola farm radio & a Silvertone AM/SW from 40 and 41. I like these because I know that it's highly likely that people probably first heard of Pearl Harbor and listened to all the war news on them. I've also a 1929 Steinite floor model set with a beautiful sound. I like making these radios work again, and like yourself I replace all of the electrolytic along with the paper & wax capacitors right off the bat. Also, with the old AM sets you can align them with the data or you can basically do it by ear. I really like the simplicity of the point to point wiring. Since I'm not an electronic genius, I find those connections the easiest to follow.

Reminds me of my childhood taking apart all those radios. Tnx de KT1R

Hello Fred I too have Heathkit VTVM my model is IM-11 and Yes if you are into restoring tv's B-Anderso makes some great videos myself I mainly restore and repair radios and audio equipment . I have been repairing radios and tv's for many years .

I do a bit of everything. I repair and mod. I have a few antique tube and transistor transceivers and receivers. I have an Arborphone 27 TRF receiver. and about a 1950 Farnsworth superhet receiver. I have a huge parts collection thanks to working for electronics companies, and dumpster diving in an electronics start-up Mecca, and hitting the boxes under the tables at ham swaps, lots of transistors, IC's resistors, capacitors, FET's, inductors, crystals, 7 segment and LCD displays, project boxes, sensors, modules, and rolls of wire from 38 gauge magnetic to 6 gauge stranded, insulated copper wire, etc. I'm a SWL. I design and build experimental antennas. I do experimental modulation techniques. I experiment on longwave to laser light communications frequencies. I build and modify QRP kits. I have several old Heathkit rigs and test equipment, from tube to IC. I do public service work, and Skywarn. I help hams build and align kits. What I do the least of is ragchew. I haven't actually talked to anyone on the air for months. I do no communications over the web to link to remote stations. I think the fundamental point of radio communications is point to point communications, where I have the ability to directly communicate with someone else near or far away without depending on anyone else or anything else in between. I have an electronics bench and room that most people would call a lab, with rubidium standard, GPS disciplined Xtal oven frequency reference, HP, and Agilent test gear, Fluke gear, Anritsu gear, freq counters, spectrum analyzers, network analyzers, 'scopes, handheld gear, bench gear, and bench and rack-mnt power supplies and other test equipment, soldering stations, video microscopes, etc. I had nothing at all as a 10- yo kid, but I was fascinated with electromagnetics. I wired an old flashlight to use as a continuity tester. I soldered with plumbing solder and a match. I took apart scrap TV's and radios for parts. Then I spent the next 60 years building an array of tools and equipment to do whatever I felt like whenever I felt like it. Now I'm retired, and I just play.

I am Ham radio operator my call is ZL1BMA and I am interested in restoration and repair of both valve and transistor radios. I have done Shortwave listening when I was younger. I am involved in the local Menzshed here and local church. Also involved in LandSAR and the local amateur radio club. My interest is restoration of multiband Shortwave receivers. I come across your channel by accident but I also noticed from your Sweater that it looked like you were involved in fire depth communications which my father was when he worked for the New Zealand fire service. Cheers for now I hope it gives you a small view of my background. 73's from David.

Yes Mr. Carson and Shango066 and bandersentv have a wealth of information. I am studying for my General, just received my Arrl study book. Trying to get in to DMR, using my Android device. I love collecting radios and have do some recapping to do over the winter. Great video! Larry, Chicago😀!

I love those old Zenith pocket radio's you have. Being a ham and an Electronic Test Tech for a defense company many years ago, collecting old electronics is just in our blood. I got my ticket back in 1977 because of all the activity on 2M back then. I'm mostly an HF listener now, but occasionally work special event stations at times. I got into all this new SDR stuff years ago and usually off building some new active antenna ideas I see once and a while. 73's👍

Iam the same way take stuff in radios and radios 📻

Love old old tube radios

Dimonds in the rough

Thanks John, that's my prize radio.

They were such beautiful radios. Awesome job restoring this one. 😃👍

Hi Fred- Fantastic video today- I’m the wrong guy to ask about radio collecting, like every thing else I buy what I like and I like a lot of stuff. 🫣😂. That Gonset radio of yours is absolutely beautiful! I would love to see a demo of it one day. Just wonderful…. Thanks! 😃👍

I am kind of like you, in that I like to collect and repair/restore old radios and TVs, and have an interest in many types. Mostly tube type, and some transistor. I like observing how so many different circuit variations were used in different models and types of radios, yet all to accomplish the same basic principles. I have done it since the late 1980s, so for about 35 years. Interests include cathedrals, tombstones, AA5/6 table radios, tube portables, pocket transistors, multiband portable, table, and console radios, stereo tube hi fi amps and tuners, ones of unique designs and shapes, and old black and white TVs, from late 40s through early 60s. After repairing some, they will either sit on a shelf or perhaps get sold in some rarer cases, and I might eventually listen to them. There are a few favorites I like to use to listen to, such as especially my Zenith 11S474 round dial console from about 1940 or 41 with eye tube.

Valve no pl sir out put and if and is osc valve no.

Excellent video!

I was shocked at the reception of that cute little radio! What a beauty! I never heard of a 4 volt battery... I even googled them... Great stuff Fred

Great job. I also have three of these radios. They work great!

This model of RCA had like 🆕 nine revisions or updates to the chassis, schematic. You have to be careful that you don't think somebody went in and changed the value that shouldn't be there until you actually go through all of the revisions and service notes or updates. I restored one of these but the radio was marginal at best and I believe they had a lot of problems with this and kept trying to make corrections over the production run. If I bought another it would be for looks and Bluetooth and surely wouldn't be for its AM operation.

Lots of parts you changed in order to get it working! I wonder what happened to take out so many different elements? Great stuff! 😃👍

Hi Fred! This issue is way above my pay grade! I would be totally lost! 😂👍

I've used Elmer's wood glue and water with tissue paper to fix speaker cones. For the plastic knobs I can only think of 3d printing a replacement. For the knurls that got polished off from use the only thing I can think of is using a brass shim cut and rolled into a tube then glued into place in the knob. You may have to drill the hole in the knob a little bigger to accommodate the increase in shaft size with the custom made brass shim tube.

When comes the review?

Restore it. Take the challenge!

I would restore it. It is a fantastic radio. My radio didn't have knobs for it. I had to purchase another radio to recast new knobs. The knobs are very expensive and hard to get. I ended up with three XR-2 radios. Fix it!

The R250 audio output transistors were probably a 2N214 or sub. The R251 was a driver and probably a 2N213 sub. All NPN and a Germanium design. Try finding good old NTE103 to replace those Germanium ones. Best guess IMHO.

If the 5 watt resistor is too hot to touch then sure it would be better to get a 10 watt. What was the rating of the one you took out though and what do those tubes do if one is bad because you got the radio working without replacing it?

It sounds like somebody connected the power supply wrong.

Wait for a donor to come along.

Briefly looked at the schematic. since the currents are so low all but the audio stages would need rebiasing. Specifically R19. I have no idea what an R240 transistors is. maybe floor sweepings from Raytheon?

That’s a tough call Fred- The overall condition of the radio looks good but maybe someone tried hooking up AC to the set. Summer is a good time to have an AC shop! 😂👍🇺🇸

If it was mine, I’d be forced to take on the challenge. Sometimes it’s about more than money. As far as the transistors are concerned I can offer a few thoughts. 1) Salvage them from an old pocket transistor radio. 2) Purchase NOS Soviet transistors off of eBay. They have really dried up since the war broke out in Ukraine, but there are still several sources. 3) I’ve often replaced germanium transistors with silicon and found rebiasing unnecessary. Even if it is, if you begin at the output stage it should be possibly to come up with suitable resistor values by doing a little bit of experimenting. 4) Replace the audio stage with an LM-386 or something similar. In the end it’s your decision. It’s your radio, your money and your time.

Fred - please the solid state diode uses sil-i-CON ---- not sil-i-CONE

Very very Cool! Fix the meter and keep it, or sell it to a collector and don’t recap it or anything. The buyer may want to do the work themselves. Mr. Carlson Lab, here on RUclips… is run by a man who loves old test equipment… and he’s not short of $, by the looks of things. Also he’s a brilliant electrical engineer. Just a heads up. Take care✨

Greetings: FWIW: While searching for a schematic for rhis radio I ran across Radiomusums' page for the chassis RC-1125B while this chassis is RC-1125. I did not research it but the model number starts with 7 instead of 3.