If the statement below is correct, that may be part of the problem. The TR4 having 6GJ5 transmit tubes could be your first real problem. The transceiver uses the 6JB6 tube for final tubes, or the 12 volt version in the very old TR4's and TR3's. There is a tendency because of cost and availability to use like replacement tubes, but doing so brings other problems to the table. I have experimented with several "so-called" 6JB6 replacement tubes, and have found there are no replacement tubes. Granted some substitutes work better than others but none performed well across all the bands as compared to using the 6JB6 tube.
Many of the side effects of using substitute tubes include erratic tuning, max output not at resonant plate current dip, neutralization issues on the higher bands, filament string current unbalance, and the list goes on and on. The bottom line the substitute tubes will give you problems, and typically they get worse the higher in frequency you go. If your pulling out your hair fighting a problem like this, just make sure the problem is not being generated by using the wrong tube. Ron Baker / WB4HFN -------------- Original message -------------- From: [EMAIL PROTECTED] To the group & all who offered assistance I did get it to load up about 1:30 AM this morning Garey Barrell <[EMAIL PROTECTED]> Hi Garey, Yep all of the filiments on the 6GJ5's were working as I advised, and you accepted as fact. Did get to the problem, my procedures and the antenna relay. Two clean out rounds later with the antenna relay got it (it had already had one) ...had to do a bit of tweaking too. Open frame, little plastic cover that clips on RF choke in the way, and I noted it needed a new SO239 so it got a lot of things done. Right now output is about 120 W but I am probably doing it wrong. Gotta find a local Elmer with Drake experience to go through the tune up procedures with me..until I can get it correct. "Beverages offered" Carl Hibbard WD8NHK (Dayton, OH) See what's new at AOL.com and Make AOL Your Homepage.
