In a message dated 2/6/03 7:25:39 PM, [EMAIL PROTECTED] writes:
> Just put a resistor in the plate of the > audio driver tube, in place of the transformer primary. I think around > 10k 2 watt will work ok. Then couple the plate of the driver to the grid > of one of the 1625s with a capacitor. Leave the secondary of the driver > transformer hooked to both grids and bias as it was. > It will work as an auto transformer to couple audio into both tubes. > Works fine! Although gain will be somewhat less than with the transformer. > I've done this too with FB results as long as one is not trying to push any power into the next stage, but only providing a voltage swing. Never had a DX-100 so have to ask, in just what class are the 1625 modulator tubes operating i.e., AB1 or AB2? If AB1 the scheme under discussion (or a phase inverter, or an itty-bitty transformer) should work FB. Nada if AB2. Dennis D. W7QHO Glendale, CA --- StripMime Report -- processed MIME parts --- multipart/alternative text/plain (text body -- kept) text/html The reason this message is shown is because the post was in HTML or had an attachment. Attachments are not allowed. To learn how to post in Plain-Text go to: http://www.expita.com/nomime.html ---
