Chuck Harris wrote:

Well, yes. When functioning as a demodulator, the diodes take the
IF frequency (455KHz), and the BFO frequency (453.65/456.35KHz), and
make audio. When functioning as a modulator, the diodes take the
audio, and the BFO frequency, and make modulated IF.

A 1N4007 cannot switch at even audio rates, let alone at 455KHz.

Okay, so we need a fast Schottky diode, with outrageously high breakdown
voltage. Something like that has to be out there, right?
--scott
--
"C'est un Nagra. C'est suisse, et tres, tres precis."