EHam.net is a Web site dedicated to ham radio (amateur radio). Le site d'un collectionneur de TSF et Phonos: Astuces, Galerie, liens. HF Amplifiers. Kenwood TL-922a. 2 3-500Z Eimac tubes. This amp is excellent! Non Smoking Home. It has the 10 meter mod as well as a couple more. I have see a lot of Heathkit SB-200 converted to 6 meters. But the 572B tube is only rated to 30 MHz as is the 811A. Beos 5 Pe Max Edition V4 Engine. And I guess it works ok but the 30 MHz cap still concerns me a bit. So if that is the case would a Ameritron 811H with the 811A convert.

I have a Ameritron AL-811 that has been converted to use 572B tubes. When I got it it would only do 100 watts so I replaced the tubes, let it sit on stand by for a day and then it would do 800 watts for a while. But after a little while it would start dropping off on power so I let it sit on stand by for several days and everytime I checked it it would be doing less power and now it only does about 80 watts.

So does it make sense that it could go through tubes just sitting on stand? And why would it do that? Could it be that the power supply voltage is too high? Drivers License Parsing Software Engineering.