Hi I have never owned this mottle of amp but I believe that it is rated as a 1 KW. Any thing you get above that is more then the (factory) specs. I might be wrong about that. God bless, Mark ----- Original Message ----- From: "Michael Ryan" <[log in to unmask]> To: <[log in to unmask]> Sent: Friday, August 14, 2009 12:21 PM Subject: Heathkit SB-220 HF Amp output > Hi all: > > I recently picked up a Heathkit SB-220. After taken the steps > necessary to bring it up slowly, the amp was idal for 15 years, here > is my results. > I use an LDG Electronics TW-1 Watt Meter to tune and here are the steps. > 1. Placing the meter in tone mode, key down in CW, Adjusting the Tune > control on the amp to find the highest pitch possible. That's how you > find the plate setting. > 2. Key down in CW, with tone mode, adjusting the load control to find > the highest pitch possible. With 10 watts from my exciter, I see about > 180W. > 3. With the amp in stand by, I increase my exciter to 100, re_ingage > the Amp in CW, adjusting the load control for yet more pitch. > The result is approximately 1000W. Note the amp is in CW/Tune and each > adjustment on the controls take about 10 seconds. > When I reduce my exciter's drive to 60W, I see 800W with the amp still > in CW/Tune. When I switch the amp to SSB, I only get another 200W. > Total output, 1KW on SSB with 60w of exciter drive. With 100W drive, I > won't see no more than 1300. > Is this normal? I don't think the tubes are bad because the amp powers > up to spec in CW/Tune. > 100W drive =1000. > > TNX all & 73: > > Michael De VO1RYN