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 Barracuda 940 27/81 Info

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2E0PWD
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Call Sign : 26-CT-4445 2E0PWD
Posts : 15
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Join date : 2022-03-08
QTH or Location : York
Equipment Used : Alinco DX-10, Icom 735, TYT TH-9800, Ailunce HD1
Age : 63

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PostSubject: Barracuda 940 27/81 Info   Barracuda 940 27/81 Info Icon_minitimeMon Mar 28, 2022 11:29 am

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. scratch  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 Sad

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
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PostSubject: Re: Barracuda 940 27/81 Info   Barracuda 940 27/81 Info Icon_minitimeMon Mar 28, 2022 11:37 am

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

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Call Sign : 26-CT-3228 Ham M7VIC
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PostSubject: Re: Barracuda 940 27/81 Info   Barracuda 940 27/81 Info Icon_minitimeMon Mar 28, 2022 4:21 pm

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. Wink Very Happy


All the best,
Victor
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Call Sign : 26-CT-4445 2E0PWD
Posts : 15
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Join date : 2022-03-08
QTH or Location : York
Equipment Used : Alinco DX-10, Icom 735, TYT TH-9800, Ailunce HD1
Age : 63

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PostSubject: Re: Barracuda 940 27/81 Info   Barracuda 940 27/81 Info Icon_minitimeMon Mar 28, 2022 6:12 pm

Thanks for the info Very Happy 

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  Barracuda 940 27/81 Info 1f44d 

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. scratch   Failing that. as you say, an interesting doorstop  Laughing

Thanks guys

73s

John

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PostSubject: Re: Barracuda 940 27/81 Info   Barracuda 940 27/81 Info Icon_minitimeTue Mar 29, 2022 3:16 am

Hi John,

No worries, should've noticed the YouTube link Wayne gave as that's an awesome example of CB radio repair right there. Barracuda 940 27/81 Info 1f44d 

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

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
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Call Sign : 26-CT-4445 2E0PWD
Posts : 15
Times Thanked : 1
Join date : 2022-03-08
QTH or Location : York
Equipment Used : Alinco DX-10, Icom 735, TYT TH-9800, Ailunce HD1
Age : 63

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PostSubject: Re: Barracuda 940 27/81 Info   Barracuda 940 27/81 Info Icon_minitimeTue Mar 29, 2022 11:30 am

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' Laughing Laughing

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

Best wishes

John

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Join date : 2019-11-10
QTH or Location : Bedford
Equipment Used : Various

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PostSubject: Re: Barracuda 940 27/81 Info   Barracuda 940 27/81 Info Icon_minitimeTue Mar 29, 2022 8:11 pm

No worries John and just glad to be of help. Barracuda 940 27/81 Info 1f44d 

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. Smile


All the best to you mate,
Victor
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PostSubject: Re: Barracuda 940 27/81 Info   Barracuda 940 27/81 Info Icon_minitime

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