To all the helpful folks on the list, I have a number of Drake radios and recently I was given a TR7 with audio problems. Upper and lower sideband sound the same. I have a service manual and a set of extender boards. The 10V adjustment is exactly 10 Volts and the 40 MHz oscillator is 40 MHz, the VCXO is 53.695. The 8.05 MHz oscillator is where I’m having problems, following the instructions in the manual, I see 10.564 MHz at pin 40 and C1030 doesn’t have much effect. Sideband audio sounds like it’s on the opposite sideband, the adjustments on the VR board don’t change the audio. I have a fairly good background in repair, but you know about the age thing—. Any help and guidance will be greatly appreciated.
Norm, k6uo ____________________________________________________________ FREE 3D MARINE AQUARIUM SCREENSAVER - Watch dolphins, sharks & orcas on your desktop! Check it out at http://www.inbox.com/marineaquarium
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