Howard, I see that you are set up so that replies go direct to you, so maybe you have already gotten your answer. I've sent this one to the list. Not familiar with your amp, so will defer to someone with more particular knowledge. But just to help things along: What type and how many tubes, what rig are you running, does the amp have a tune or low power switch, and do you know that the amp is in working order? If you haven't gotten your answer already, maybe this info will help. 73 and good luck, Steve KW3A ----- Original Message ----- From: "Howard Traxler" <[log in to unmask]> To: <[log in to unmask]> Sent: Friday, November 13, 2009 7:45 AM Subject: tuning tube output amps > Starting from the very start, what is the procedure for tuning a tube = > output transmitter or amp? Thanks. > The other Howard > WA9RYF >