Vintage CB Radio Repair

[@leftovertech]

That was fun. I learned when I was a pre-teen in the 70's that the 3 channel and 6 channel models sold at Radio Shack in the US used the same motherboard. Got my dad to buy me a 3 channel/ 3 watt model and figured out how to add some channels. Also discovered that some 3 watt units were "derated" and could be tweaked up to 5 or 6 watts. Thanks so much for the fun video!

[@paulgrodkowski5839]

@leftovertech, are you referring to the channel Vintage CB Radio Repair?

[@dang48]

Nice find. Looks like someone was working on it though from the stripped screw and the missing and incorrectly placed crystals. I found that the screw extractor worked like a charm in removing the screw. Just had to be careful with it and know that I would have to replace the screw later.

[@davesdigitaldomain]

would love to see more radio repairs on this channel with more explanations on how they work..Keep the videos coming Richard there great

[@petestamm5996]

Yes definitely, me too. The video Richard did with the CD/ Radio player together with a detailed explanation of how radios work was one of my favorites. I've got several old AM/FM radios I would like to try repairing but I still struggle to understand the concepts.

[@sivoltage]

Brilliant, what a find! More RF stuff please :)

[@paulgrodkowski5839]

@sivoltage are you referring to vintage cb radio repair in your comment, "Brilliant, what a find! More RF stuff please:)"

[@castlecodersltd]

Another great explanation. Thank you. ☺

[@escheytt9326]

From paper route money in around 1961, my first transistor radio was a used Channel Master; leather case and two or three transistors.

[@paulgrodkowski5839]

@escheytt9326, I find your above comment very hard to believe.

[@ianhewitt1858]

That was very informative. Some may argue that as it wasn't broken it should be on a repairing Chanell. However, I think if you are going to repair stuff, you need to have an understanding of what it does and how a 'good one' works. So, working stuff is fair game as it is still teaching how to fix stuff. For the purists though, may be you should let a family with some kids have your 'working' stuff for a few hours as I am sure that the 'working status' would change quite quickly!

[@LearnElectronicsRepair]

Haha that may solve the problem. As I do actual repairs on this channel I have no idea when I hit record how it is going to end.

[@melvilib]

Cor, That takes me back to the late 70's/early 80's with G&G Institute Radio C 🙂

[@paulgrodkowski5839]

@melvilib is the previous an undercover police name for you?

[@tonypacke6954]

Another great video as usual. I'm sure the local police are still walking up and down the road after picking you up on their computers😂

[@marcseclecticstuff9497]

The 2 transistors by the transformer are probably the audio amps driving the speaker thru said transformer. Early transistors could be squirrely, they may be thermally bonding them together so they tracked better, reducing distortion. It has the added benefit of providing a solid ground and extra sink area. Quite cleaver on the designer's part.

[@paulgrodkowski5839]

Hey there @marcseclecticstuff9497, do you know what a designer is?

[@karltest1314]

I had two of these. Operated in CB frequency band. The battery life was abysmal. Were used very little due to battery cost. Range was about 2 miles

[@daz41262010]

very informative video :) thanks Richard :)

[@paulgrodkowski5839]

maybe too informative?

[@frankbaron1608]

i owned one of those when they first came out. required about a billion batteries

[@kabuti2839]

Nice, durable vintage transciever. Still working when our 'civilization' is being excavated in a thousand years

[@Dutch_off_grid_homesteading]

Heya, don't know anything about radio Fz or the transistor based tv would love to see a tutorial about that

[@luisarminana8141]

Que modelo de cristal lleva, puede ser el HC25/u?

[@Sydney268]

Interesting stuff

[@magnusterminus4728]

Fascinating

[@glennthomas7435]

Vivek Ramaswamy for President, Young, brilliant mind, with a conservative platform that is outstanding. "With a name like that he has to be good" .

[@lesjones5684]

Ok mate 😂😂

[@paulgrodkowski5839]

hey there @lesjones5684 what's so funny?

[@egenestarr1986]

so is the 455 kHz the internal unit frequency operator or is it the actual output thru atmosphere antenna signal frequency?

[@brano2yt]

Its internal frequency for receiver amplifier, its tuned to this frquency by coils+caps on every transistor stage. By subtracting frequencies, you shift all the near, not wanted frequencies down by the same, so their percentage difference rises, so you get rid of them more easily.

[@egenestarr1986]

@@brano2yt ahhh thank you, wow i never knew that, very interesting electronic theory, compared to today its easy peasy i bet ha ha

[@brianbloom1799]

Just turn on another Cb radio, Go though the channels, I own a matching set of those, work Great, I used them a auto swap meets talking to my son Inlaw

[@brianbloom1799]

I,m Pretty sure the red crystals writing are Transmit, Crystals

[@hugovale8070]

I love old stuf !!! I think its not a heatsink ,,, its maybe a shield , grounded . Comments bellow guys Cheers Richard

[@LearnElectronicsRepair]

My guess is still heatsink, otherwise why need the heavy piece of braid soaked in solder if not for thermal transfer?

[@ralphj4012]

Guesswork on my part, but, yes, likely to be ground bonding to reduce noise (otherwise the transistor cans, especially germanium types, are effective receivers or radiators). Some have a fourth pin, marked case.

[@diecrafter1986]

nice!

[@aol767]

I had a midland 3 can. W 9 er. I could shoot skip land from California across to the west coast on my mini trail 50 and was on the convoy to stalk Charles Manson w other armed cars that flushed him out of skeleton canyon in Santa Rosa rd Norwegians grade up in to Chatsworth Knolls and radioed in to rangers that caught him in a cabinet hiding by a trailer Pyle, his hair was hanging out that gave him away.

[@paulgrodkowski5839]

Pardon for my interrupting, but why are people still going around and fixing things?

[@stevescutt2865]

1 9 a copy ! 1 9 a copy - this is Mighty Mouse (that was my handle) . Goh CBs were (are) crap really werent they. lol.

[@LearnElectronicsRepair]

My handle was Tricky Dicky LOL

[@nathan5315]

A and C ? Tx same.

[@jonathanpickering1457]

They were made for the us

[@banjax66]

Who else spotted a mistake in this video? Watch the video from 17:00 to 18:00. Ian.. 2E0IFZ

[@paulgrodkowski5839]

The Police internal affairs did.

[@BigBoss-rh7zq]

455khz

[@LearnElectronicsRepair]

Yeah, but i worked it out from the crystals rather than just knowing it. Is there some reason for 455KHz instead of 444KHz, 450KHz or 500KHz? Something to do with harmonics?

[@paolomonai9511]

​@@LearnElectronicsRepair As far as I know, this Is a kind of standard like 10.7 MHz Is a standard IF frequency for a FM receiver. There are a couple of other IF standard frequencies: 60 MHz for radar receiver and 70 MHz for microwave radio link receiver. If you have a standard IF you can have a wide choice of components, mainly filters and IF amplifiers. So It Is convenient to have a frequency planning in your receiver containing standardized IF frequency. Regards from Italy.

[@lesjones5684]

Please shave your fingers 😂😂😂😂

[@FrancesE.DekEsquire]

tHEM xTALS WERE MANUFRACTED IN oKLAHOMA cIYTY, oKLOHAMA. i OWNED PROBLY 50-60 ON THEM bIG hEAVY wALKY tALKETS.