Hi Chris,
Yes i published it on Dropbox a few years ago but i think the link
doesn't work any more. I attach the two images here, the size is small
enough.
73, Stefan
Am 21.11.2018 14:40, schrieb Chris Wilson:
Hello DK7FC,
Is the H bridge amp a published design Stefan, and if not, would you
consider posting it please? :)
Wednesday, November 21, 2018, 1:00:23 PM, you wrote:
Hi Luis,
thanks for the nice readably summary report.
Oh yes it was an impressing night and good resultsfor us. I saw
you were decoded at SM2DJK which is a good distance, and R7NT was
seen at 2E0ILY. There are more challenges like the path from EB8ARZ
to SM2DJK, that would be about 4000 km and still inside the continent.
I also thought about LU8YD but also about PY2PLL.
EB8ARZ has the perfect RX location, so if LU8YD would transmit on
LF, like in the past, it could work in WSPR-15 just before the sunrise in EA8.
About the MOSFET discussion, i'm using IRFP460A types in H bridge
configurations from SLF to MF, i.e. the full spectrum :-) Bridge
voltage is 320 V DC, the rectified mains voltage.
With the currently pair (4 pcs) of FETs i'm TXing since hundreds
of hours on LF without problems. They are of course in TO-247 design
and cost just 2.2 EUR, so a BANG/year wouldn't really hurt.
73, Stefan
LF H bridge PA, DK7FC.png
Description: PNG image
LF H bridge PA Exciter, DK7FC.png
Description: PNG image
|
