On 01/13/2017 07:54 AM, Chris Wilson wrote in part:
/* snip */
I am running it off a pair of big HP SMPS computer server supplies.
52V each, at many Amps. In series for full power, singly for low
power. Before I changed driver chips and added some additions to the
protection circuit I had few FET failures, even with them in series.
/* snip */
Sorry for the diatribe, any advice greatly appreciated Manfred. When
it all works without a blow up I can get from here in the middle of
the UK into Asiatic Russia, Iceland, Italy etcetera, so it does have
some promise when fettled up a bit!
== == == == == == == == == ==
The 600 meter (or 630 meter) amateur radio band is a frequency band
allocated by the International Telecommunication Union (ITU) to amateur
radio operators, and it ranges from 472 to 479 kHz, or equivalently
625.9 to 635.1 meters wavelength.
The band is available on a secondary basis in all ITU regions with the
limitation that amateur stations have maximum radiated power of 1 Watt
effective isotropic radiated power (EIRP); however, stations more than
800 km from certain countries may be permitted to use 5 Watts EIRP.
from: https://en.wikipedia.org/wiki/600-meter_amateur_radio_band
== == == == == == == == == ==
The U.S. Federal Communications Commission (FCC) granted the American
Radio Relay League an experimental license to explore such uses in
September 2006. In 2015 the FCC proposed rules to permit amateur use of
630 and 2200 meters in line with decisions made at the World
Radiocommunication Conference 2012.
from: https://en.wikipedia.org/wiki/600-meter_amateur_radio_band
--
Ron KA4INM - Youvan's corollary:
Every action results in unwanted side effects.
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