[Lowfer] Current Fed Modification to G0MRF transmitter

[VE7SL at shaw.ca]

Warren - this is the same feed system used here on my Kw amp modules and 
also on the earlier smaller VE7TIL-designed 500W P-P transmitters. On the 
big amp I used line cord for the primary and on the smaller earlier amps 
used solid #20 enameled and both methods seem to work well.

Steve / VE7SL


Steve
> Hello the list...
>        Since my G0MRF is experiencing intermittent short circuit in the 
> final amp, I plan on re-doing the output circuit per the M0BMU 
> modification:
> http://www.g0mrf.com/images/300w/PA_schematic.jpg
>        The M0BMU mod changes the circuit to a current fed design which 
> improves the efficiency. The mod calls for a transformer primary winding 
> using 12 strands of 0.3mm e.c.w. (enamel covered wire).
> I assume that the 12 strands are used to improve the Q similar to the way 
> Litz wire works?
>         Has anyone done this mod? Has anyone tried alternatives to the 12 
> strands of enamel wire?
>
>    73 & tnx Warren K2ORS
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