Ok I've a lead on a president Madison. After many questions and some research on a president Madison I've decided to purchase one. I didn't buy it yet but something sounds odd. The owner tells me ssb is 12 watts which sounds correct but it dead keys at 3 on am and swings to 12. I know depending on the meter being used readings can be a bit different. my current set up is a Sonar fs 2340. It dead keys at 2.5 and swings to 6 on a workman newer meter. I think the workman is fairly accurate as the readings are exactly the same on my dosy. I'm using it with an amp that has a 35 amp power supply. It has a coat of arms on it with a lion in it. From my research it's a Palomar elite 500. The amp was produced under several different names. Might it be the meter he's using or is it normal for an unmodified Madison to dead key at 3 and swing so high on am. Although this amp doesn't have an ssb selector switch it does recognize ssb as I hooked up a Browning mklll, transmitted on ssb and the amp worked well on ssb the mklll on ssb is another story. Will a dead key of 3 swinging to 12 be a bit to much for this amp to handle on am? I would hate to fry this amp as it's been working excellent on am with my Sonar. I hate to do anything to this Madison(if I get it). As I said it's supposed to be unmodified. Any sugestions? I do have other old 11 meter sweep tube amp I could use but I don't recall ever using anything with that kind of swing on any of those amps either. I would like to stay with the no tune no 15 minute warm up time lion crest amp I'm currently using.