PS: The primary winding should be wound bifilar and the turns should be
spaced equally arround the core.
Am 08.09.2016 13:08, schrieb DK7FC:
Hi Luis,
I can agree with the notes / recommendations by Mike and Markus.
Am 08.09.2016 11:13, schrieb VIGILANT Luis Fernández:
So, we have: U3S with duble
frequency to 74F74 feeding both channels of 7667 and the pair of
IRFZ48N. Do I keep the RC at the mosfet drain ?
All the rest as in the W1YD
schematic ? Less primary and secondary turns in the output transformer
noted
Yes. Keying the driver instead of the signal generator will improve the
performance.
At 13.8 V / 50W and AL=5000 i would use about 2x 6 turns. First run the
PA only with the primary winding and see if the core becomes warm. The
power consumption including the driver should be less than 200 mA. If
this works well then you can add the secondary winding, which can be
tapped for a Hi/Lo switch of course :-)
The IRFZ48N should cut high voltage switching impulses, so the RC
network may be obsolete. Just try it. One of them costs 0.59 EUR here
:-)
73, Stefan
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