Hi Wolf,
I prefer to build my PAs selfe. This is ham radio, no need for expensive,
"ready to use" equipment, especially on LF/VLF. In my point if view, a homemade
PA without a noble housing but rather chaotic soldered and working is more
beautiful. It has something individual, creative! :-)
Don't you think the same way? ;-)
73, Stefan/DK7FC
PS/BTW: 2kW on VLF is no problem, since one does not have to work at 50 Ohm.
So, if working with a H bridge (4 FETs) in the PA and a isolated primary,
stepped coil (just like my coil), one can vary the output power by changing the
primary number of windings. Maybe i should follow this idea! ;-) Really, i got
this idea in this moment! Currently i am using a big ferrite output transformer
for the new PA and i am afraid it is not suitable for such a power at such a
low frequency. I will try this :-)
________________________________
Von: [email protected] im Auftrag von Wolfgang Büscher
Gesendet: So 04.04.2010 09:51
An: RSGB LF Group
Betreff: Re: VLF: 4th VLF experiment by DK7FC/p
Hi Stefan and group,
Looking for a "big" VLF PA ?
http://www.thomann.de/de/the_tamp_d3400.htm
Ok, 2 * 1800 watts at 4 Ohms or 2 * 2000 watts at 2 Ohms are a bit
impractical, but it's a 'virtually undestructable' class-D amplifier,
and the price is more or less a bargain ;-)
73,
Wolf .
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