Hi Roger,
Its nice to read your sub 9 kHz page. There are many news that we don't
know by the reflector, like the new planned coil of PA3CPM or the tests
with loop antennas of LA3EQ :-)
Sometimes its like reading an on line radio magazine :-) Very good work!
I have to send you a photo of my new VLF PA, if it is ready to use. The
one you show there is the very first version of my class D QRP PA. You
published a photo of my H bridge PA in your article in the UK radio
magazine (don't remember the name). This one is still up to date. Maybe
i have to replace the FETs if i try QROO soon, that's why a build a
second one, to have one redundant...
73, Stefan/DK7FC
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