Midland 76-900 CB27/81 Uk FM CB radio base station - repair & service pt1of3

www.ebay.co.uk...
Now on ebay - I've finally got around to publishing part 1 of this. I bought a large batch of CB stuff off ebay or about £400. All I wanted from the lot was a pre-amp!
At first glance this set freally looks ropey, but upon opening it up It turned out to be in better condition that either of my other two & hasn't been messed with either.
Initial tests showed around 4W output but unbalaced between channels 1 & 40. RX looked reasonable. All tests done with the bench power supply. I never plug 'unknown' base station in as a faulty power internal supply could be pushing out 26 volts....and wreck the actual radio.
Behind the scenes, the large LED green display turned out to be faulty. I ended up importing two from the USA for £20. Not cheap.
Upon testing the internal PSU after changing the three capacitors, I couldn't get more than 10V out if it with one of the transistors (on the PSU boad) overheating. It turned out that a 5.6V zener diode was leaky & one had to be ordered as I'd nothing in stock under 9V.
Recorded 11th July 2024
Richard, G0OJF
Lincolnshire, UK
(C) Tango Systemsroup 2024
[e-mail]

[@rogerburchell4567]

"Back in the day.."...as they say , everyone seemed to have one of these.....looking forward to the on air test ...👍

[@JamesHowe-ci5vt]

Great service of the Midland home base looking forward to the on the air test.

[@paulchapman1175]

hi 👋 richard good luck repairing &servicing the midland 76-900 cb 27/81 uk fm cb radio base station from paul chapman at east sheen 73's

[@ukfmcbradioservicingTango21]

Thank you Paul, Richard

[@Brookspirit]

knoxieman has been making new channel displays, he shows them in his last video from a few days ago.

[@chris_vandepeer]

Ahh the rusty one you was talking about.

[@ukfmcbradioservicingTango21]

yet turned out internally to be the best I've ever seen! Richard

[@chris_vandepeer]

@@ukfmcbradioservicingTango21 My wife is disabled so i had to stop the video last night but now back to it.

[@chris_vandepeer]

@@ukfmcbradioservicingTango21 At 3.09 wow it looks fab inside so no silly 80 channel mod.

[@BoB4jjjjs]

Nice sets those, a bit over the top, but who could refuse one? Very costly though!