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Hi I have a tra3900 vhf set which has high harmonic content on when the bnc socket is in use (-20 to -30dBc). If the whip is in use the transmit is clean with harmonics better than -60dBc. I am

Andy, The attached is slightly better, if zoomed in (but not by much). Not the easiest manuals to copy, as they really need an A3 scanner, which I don’t have. 73 Al G8LIT

Andy, well I have one, but its not a wonderful copy.??? See enclosed - it may help.?? If not - someone may have a better one. Richard G7RVI

Hello Can anyone provide me with a copy of the layout of the MA991 PCB for the TRA967 radio please? Mine is driving me mad trying to work out what component is which. My sight not being good, it's

Dear colleagues, I’m posting this behalf of a good friend of mine who is looking for a IF/AF Module of the Racal RA3701 receiver. If anyone can help then it would be really appreciated, Kind regards

Hi Anton, Thank you very much. Regards Stephen -- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus

Stephen, Maybe I can help You for front panel assembly but don't hold Your breath I need to repair at least a dozen this thing for emergency and SAR team before I have a key to warehouse full of

Hi Anton, Glad the manual will be of use. I have not used my PRM4021 for a year because all the frequency control knobs are broken. Regards Stephen -- This email has been checked for viruses by Avast

Hi Stephen Thompson, Really really appreciate Your help Regards, 73 Anton

Hi Anton Moehammad via groups.io Just uploaded PRM4021 Tech Manual Best 73s stephen thompson -- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus

Hello, This email message is a notification to let you know that the following files have been uploaded to the Files area of the [email protected] group. * /PRM 4021 Tech/Racal+PRM-4021.pdf (

Hi All, I need help to find a service manual for my PRM-4021 I only have not so complete ultra low quality scan file of schematic diagram Thank You, Anton

Hello, This email message is a notification to let you know that the following files have been uploaded to the Files area of the [email protected] group. *

Hello, This email message is a notification to let you know that the following files have been uploaded to the Files area of the [email protected] group. *

Peter, I have a PRM 4031 and I found some info on the web. I have it on the PC somewhere, I will look for it tomorrow and see what I have. Mine has a fault on the synth board which I have been unable

Dear All, pleased to join your group, I’ve been a member of VMARS for many years now and have an extensive collection of WW2 radios. I have a PRM4031 radio which has just failed and am urgently

What else do you need to know?

Hi JB Yes got those hand drawn diagrams thanks. Dave g1jwg

Have you checked out;? RADIOMUSEUM.org ? Regards JB.

thank you? !! ? I knew? it was a low value as its was crispy,? a tantalum of course shorted and pulled what ever is on the trace to ground we will see if it works after i replace all of the 4.7 uf