06-08-2019, 05:30 PM
(06-08-2019, 04:38 PM)Mike Watterson Wrote: I wonder is it the same idea? Two triodes and a rectifier.
Modulation by using a transformer driven by audio amp / osc that is in the HT to the RF oscillator?
The modulation transformer died on mine and I used the CT of a 230/115 primary to HT, the two ends to the two triodes and the secondary for the feedback for the audio oscillator. A capacitor sets audio frequency when osc rather than external audio is selected (I think the Mod/CW switch).
I can imagine the layout differs, but since most generators, even some transistor ones are the same circuit I imagine the circuit can't be very different. The attenuator is pretty simple.
Hi Mike,
I had considered that, but I guess it's the confidence of going past the point of no return with this in the absence of the official drawings with it. I shall take another look with the drawings for the 65. Let me take another look tonight...







