[dconant]

All tubes have been tested and are good. The 6F6s are not into the good very much but another set that tests better did not make any difference. I retested the 6R7 tube and all three elements are 70 percent or better where 50 percent is questionable. The diodes are 80 percent and the triode is 70 percent. Signal generator is not accurate so I use a frequency counter to set it to 470. "then ensure that the oscillator is 470KHz above the signal" how do I do that? I do not have an MP3 player. I can try one channel of my tape deck output. Will I need a capacitor between the two for that? The picture is a shot of one of my IF cans.