[Lowfer] Current Fed Modification to G0MRF transmitter

[Warren K2ORS]

Tnx Steve!

73 Warren

On 12/15/2012 12:03 PM, VE7SL at shaw.ca wrote:
> 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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>
>
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