Barracuda 940 27/81 Info

Hi guys

I've been given an old Barracuda 940 radio this morning and told, "I don't know if it works."

First basic examination shows that the power lead fuse is intact and working but nothing lighting up - and that's as far as I've looked at the moment.   I think it will be a Saturday morning project as life takes over from radio sometimes!

I've searched the Internet for any service manuals or user guides and haven't been able to find much at all.  Even YouTube doesn't have much

Just wondered if anybody out there has any info on these radios or can point me in the right direction  as to where I can find it.

73s all

John

This seems to list documentation for a Barracuda HP940

https://www.angelfire.com/tx/ChargersCastle/CBStuff/CBTechDocs.htm

Video

https://www.youtube.com/watch?v=oBUc7iKK7NE

Hi John,


Cybernet PTBM134 chassis same as many others, Rotel 240, Binatone Five Star, Fidelity 2000, Harrier CBX etc.

Circuit diagram for one of those type here:-

http://www.zen96216.zen.co.uk/cb/schematic-diagram-ptbm134a0x.htm


Worth checking the diode on the power input first, (marked D10 on the schematic), if it's blown open chances are the rest of the radios is blown too. You should get at least a light on the S-meter though? Unless that's blown also, (trucker special of hooking them to 24V!)

Might be worth checking the on/off/volume control too, sitting on that corner they're often bumped from a drop damaging the switch.

Hope you get somewhere with it but no loss if it was a freebie. Could make a pretty doorstop.  


All the best,
Victor

Thanks for the info  

Thanks for the links, Wayne.  I'd seen the YouTube video but not the other info so thanks for taking the time to look for it   

Thanks for the diagram, Victor. I haven't had chance to look at the radio properly today so it's looking like a weekend time-filler.  If I can get it working, I'm thinking of replacing the DIN mic plug and socket with something more substantial.   Failing that. as you say, an interesting doorstop 

Thanks guys

73s

John

Hi John,

No worries, should've noticed the YouTube link Wayne gave as that's an awesome example of CB radio repair right there.  

TBH my answer was from memory and I'm currently struggling with Covid hence up at this ungodly hour checking CT!!

If it helps any here's a link to a free copy of the Rotel 240 service manual mentioned in the video :-

https://elektrotanya.com/rotel_rvc-240_service_manual.pdf/download.html


Don't get trapped into the ass-water theory of recapping either!!

https://resources.altium.com/p/electrolytic-capacitor-lifespan


All the best,
Victor

Thanks Victor

I wish I knew all these little tricks about the radio chassis being alike but, as they say, you can't teach experience.  The service manual is a great help.

I've done my fair share of checking 'popped' caps and I'd rather not go down that route.  I did like the reference on the Altium website to 'capacitor plague'

Hoping you'll be rid of the Covid soon.  I picked it up in hospital last year...not pleasant 

Best wishes

John

No worries John and just glad to be of help.  

Thanks for the kind words too it's very much appreciated, been a rough few days but seem to be clambering out the other side now.


All the best to you mate,
Victor