[Kenwood] TS 520--Problem tuning it up.

Tue Jul 6 01:18:39 EDT 2004

 I have a Kenwood TS 520 which I have just tried to put back into service after it was stored away for about 9 years. After about 90 minutes of warm up, it works great. However during the first 90 minutes after turning it on, there is only an instantaneous deflection of the meter when metering drive and plate current with key down during tune up procedure. After about 90 minutes the problem disappears and tune up can be completed afterwhich the rig works perfectly. Oddly, even though I cannot get a key down sustained deflection of the meter for plate current or drive when first turning on the rig, nevertheless I can operate in the SSB mode with full output power. It seems likely to me that the carrier board in the rig has a defective component although I've never encountered a component that takes 90 minutes to warm up. Would appreciate any advice or suggestions. Thank you. Bill...K6SQL