Lots of the ordinary things have been checked, but Have you checked the Bird? Bill-W4BSG - Bill Aycock -- Persimmon Hill Woodville, Alabama, US 35776 (in the N.E. corner of the State) W4BSG -- Grid E
- Hello there, - A non amps member, Bob W0YVA Emails me with a problem he's having with his just purchased used Alpha A77. Care to take a stab with your opinion of the problem..? - I have directed hi
Author: Michael Tope" <W4EF@dellroy.com (Michael Tope)
Date: Tue, 29 May 2001 20:15:48 -0700
Sounds almost as if the plate blocking capacitor is bad such that the tank is only loosely coupling to the tube (that could explain the weak dip, and the low output power). Does he have an impedance
Does he know if the wattmeter is reading correctly? 73 Todd Roberts WD4NGG . -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissions: amps@contesting.com Administrative requests: amps-REQUEST@c
After looking over my '77, here's a list of things I'd check. .. Make sure bandswitch chain drive is in time. (correct contacts engaged and centered in all switches) .. Plate blocking cap. (already m
The fun begins. Fixing something that does not work is the joy of ham radio. Perhaps the worst feeling when making repairs is taking something apart, spending a lot of time confirming all the compone
/\ in my experiences, when transmitting capacitors fail they short. cheers, Mike - R. L. Measures, 805.386.3734, www.vcnet.com/measures. end -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submiss
/\ good idea, Colin. cheers. - R. L. Measures, 805.386.3734, www.vcnet.com/measures. end -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissions: amps@contesting.com Administrative requests: a
Does the output as read on the Bird agree, roughly, with the A87 output meter? Bert, fVE3QAA -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissions: amps@contesting.com Administrative requests
You may get a shallow dip if the plate is tuning a harmonic instead of the fundamental. This may be a bandswitch problem. Or something really messed up in the output ckt. 73 Bill wa4lav -- FAQ on WWW
Author: Michael Tope" <W4EF@dellroy.com (Michael Tope)
Date: Wed, 30 May 2001 07:40:41 -0700
Yes, but that would totally destroy my half-baked theory! Mike, W4EF.............. -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissions: amps@contesting.com Administrative requests: amps-REQ
I bought a used 77DX with problems. The major one was the chain drive on the band switches. On some bands the plate switch indexed properly while the input switch was only partially indexed. On some
I had the same symptoms with an Alpha 77SX... Low power. The problem was slipped chain drive and improperly indexed input and output band switches. A youngster thought they were neat cranks and crank