--
Message: 1
Date: Thu, 27 May 2010 12:36:24 -0400 (EDT)
From: Larry Szendrei n...@securespeed.us
Subject: Re: [AMRadio] Heathkit DX-60 grid current drops
To: Discussion of AM Radio in the Amateur Service
amradio
My Heathkit DX-60 grid current drops after a couple of minutes and will keep
dropping more rapidly as I increase drive level. Eventually the tube plates
glow red. I am tuning by the book.
Any ideas?
73
Brian
kf5...@arrl.net
KF5CCN.COM
Please Join my
Brian the final is losing drive from the driver/buffer/VFO. Check all
tubes first then if that doesn't fix it you will be troubleshooting
under the chassis to find out what components may be changing value.
Jim/W5JO
- Original Message -
My Heathkit DX-60 grid current drops after
As Jim says, you may be losing drive to the final grid because the drive
signal is going away. But that's not all that can go wrong. Make sure the
final grid bias resistor hasn't drifted off-tolerance or changing value as
it heats up. If it is, replace it. I have also had bad final tubes (pair
of
4 matches
Mail list logo
