Repair your CB Radio - Realistic TRC-448
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Uploaded by radionut63 on Oct 17, 2010
In this video we take a look at one of the first 40channel cb radio produced... YES there are TONS of them. the trc-448 was built on the same chassis as the old 23channel cb radios - trc-47 and trc-48.
This radio has a little problem that it well not work between ch-1 and ch-4, turns out that the VCO circuit was out of lock and caused this problem.
Uploader Comments (radionut63)
All Comments (9)
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At the age of 15 I could not afford to buy any test equipment other than a Multimeter so all my test gear was home made.
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I first started repairing CB radios in 1981 at the age of 15.
Electronics was self taught as here in England it was not a subject we learned at my school.
By the age of 15 I had all the channel switching mapped out on paper. It was all done in binary on most rigs.
I used to turn down the voltage on my power supply from 13.8 volt to around 8 volts to test the VCO. If the 'rig' had any problems with the VCO they would soon show up below an input voltage of 8 volts.
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I have the TRC-48. there are lots of differences in the way the layout is inside... everything on the 48 is on the opposite side of the board... upside down for some reason. I have a somewhat similar problem on channels 17-20 I think that something on the board itself (not a wire) is bad...
Also, I couldn't notice if it was or not, but was your 448 in this video an all crystal radio? because my 48 has 16 crystals and a huge filter / switch... it also has a dial display and not a digital...
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@Koolnote You bet ! I love the vidios also allot :D
Here in Holland CB has died.. Thats a shame.. Im glad to see usa still uses them
So i can call them @ 555 (6)
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WOW i like that radio dude, i never saw it before
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I like these old radios... They are reliable, repairable, modifiable and enjoyable.... That is a lot of able and, certainly, Radionut63 is very able..... Awesome repair job... Keep up the good work!
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Great Video !! much better with the music on the intro and the exit
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This is a great video! I like watching these and look forward to each new one that you post with repairs. They are very helpful!
It is an obsession with me to learn more and more.
Koolnote 1 year ago
@Koolnote well i know a little, but i am NOT no professional trouble shooter..lol i also learn as i go, and try to help folks when i can! glad you like these...
radionut63 1 year ago