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Hi guys. Apologies for posting this on the bulletin
board too but I am pulling my hair out.
I have two TR7's one which I bought as
good the other as known faulty.
The good one developed a problem over about a week with the received signal sound getting ever worse and harsh. Then on switch on lights up but no display no received signal even with external VFO - help please where do I look? The other TR7 is unstable on switch on and displays about 17.250 but is ok on the external VFO. After about 20 minutes it seems stable but still occasionally goes off frequency. A quick study of the circuit seems to point to the VCO board - again any help would be appreciated. Dave G0MJK
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