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Hello Alan Ok, thank you. I can understand the moderators not wanting to put info into public, but it's not very helpful at times. As the 350 was a Plessey design, I did not expect to see Racal

Let me start by saying that this project is driving me crazy.? It shouldn't be this hard, but somehow, I just have a block. In order to power the LM380 board from the receiver, I have to connect the

Andy, Sorry about that; I just realised that Groups.io helpfully resized the pics I attached enough to blur any useful detail: my local copy was as sent, but unreadable once logged in to the Groups.io

Hello Alan Sorry when I try to open the attched, I can't see any detail. It's just a fuzzy blur. Could you try sending each as an attachment please? Or I would be happy to pay you photo copy

Hello Alan Ok, thank you. Thanks for the info, and your experinace of problems.

Andy, Please see attached; I’d test the big smoothing caps for high ESR, or other problems, especially the one on the 9V rail, that provides feedback to the custom chip? ?In recent years, I’ve

Hello Scott Thank you. Yes, I did think it was the soft start circuit, but don't have a circuit or layout for the module.

If it tries to start but crowbars look for bad electrolytic or tantalum bypasses. --scott

Hello, does anyone have a circuit or any information on the power module of the PRC350 please? It's module 16. Mine tries to start, but stops drawing any current. I have a block diagram, but nothing

Thanks Dan, What I need specificall is to fix the Transceiver board Type MA930 vs MA930X Also, if anyone has a spare working XCVR Board MA930 for sale that would be great. Ilan 4X6MU

Ilan, I'm slowly bringing a plain 931 back to life, using the X/Y manual.? The two main boards and PA board seem to be the same and the only differences I see are those connected to the two extra BNC

Hi Guys, Can anyone send me a pdf file with Technical Service Manual for the TRA931. TRA931X/Y available but the plain TRA931 version couldn't find anywhere. Help Appreciated. Best 73s ILAN

Hi, thanks for the reply. The capacitors on the power regulation board have been changed and the set switches on when fed with 12/14v anything over 14v and it refuses to fire up. It is suposed to be

We used a lot of tantalum capacitors on supply lines at Racal in the 1980s and every piece of Racal test equipment I've bought recently has had at least one fail, so your diagnosis looks

TRA3900 I think you mean. There’s a capacitor that fails on the 85V supply circuit that may be the problem on yours. From what I remember there can be either tantalum or electrolytic caps used

I am looking for a vehicle mount for a VRM5080 radio. W5DTW -- This email has been checked for viruses by Avast antivirus software. www.avast.com -- MOGMAN

And by the way... Price and location pls Thanks SergioD.

Good day to all, I'm placing a request on here with the hope of picking up some spares for a tra9300 vhf set. I'm looking for a vehicle rack module and leads, but most importantly, I'm looking for a

Hi guys, I'm bringing a TRA-931 back from the dead. On my RF board sits a piggyback board which I presume is the Switching & Fixed Level Audio Amplifier Board. This is though, very different to the

Hi Duncan thank you for the explanation so not in the UK It’s the VAT and Duty that are causing big problems when buying second hand equipment apparently this is not the case with other items