Hi Chris,
Am 25.05.2017 12:40, schrieb Chris Wilson:
I was wondering if the #3 material which is rated for use from 0.05 to
0.5 MHz, and has several times the permeability would be a better
choice for more power through it? It probably gives a higher Q with
fewer turns, allowing the use of larger wire without having
overlapping layers in the winding?
Yes that sounds like a good concept.
It is interesting to follow your plans. Actuelly i would like to try to
build a 2.5 kW or larger PA as well, just for interest of course. I
would of course use it together with a dummy load only, because you must
not radiate more than 1 W here in DL, and i am a conformist and under
the spell of authorities (german: autoritätshörig) :-)
It would be interesting to deal with the problems that would appear with
such PAs. For say 3 kW and the comfortable situation to have a suitable
60 V power supply, i would simply build a current mode class D PA, hard
keyed with an IXDD614CI and 2x 4x IRFP260N FETs. For the LPF i would use
the T225A-2 together with RF litz wire, maybe 250x0.1mm, available at
https://www.spulen.com/hf-litze-250-x-0-1-mm-100-g-spule.html and
WIMA-FKP-1 capacitors, the 2 kV version...
Good luck and fun with your projects.
73, Stefan
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