Re: [AMRadio] Home brew AM

Hello people, I agree with the nice look and smell of "glass" AM. Few years ago, I made my CW/AM transmitter, with an 807 plate/screen modulated, 50 watts CW, 40 watts AM output. Started with a triode/pentode oscillator/doubler VFO, then converted to solid state oscillator/buffer, followed by a

Re: [AMRadio] Testing tubes

Hello Barrie: Barrie Smith escribió: Attempting to discover why an old Luxman tube-preamplifier didn't sound too good, I drug out the Hickok Cardmatic tube-tester this morning. I noticed that 6 of the 7 12AX7s tested off-scale (to the right, above 100). New 12AX7s that I tested ran from 80 to