80w Exciter more like )
Ive found, what is a 500 watt , 500KHz power module , the design was to
minimise transformer geometry, which uses discrete logic, to fabricate the
H drive requirements , there seam's to be sufficient information available
, to question the choice of a half bridge , over that of the full
version? ,
Its tempting to link the harmonic content , with the high loss rate of
devices , In your 136 vk experiments, with the H , did you loose fets
, other than by loss of tune ?
Is there a ferrite , that is comfortable in 136 and 477 service ?
In terms of compact driver 'devices' yes, are about, but, may be the
additional functions are of little use in this application .. but worth
consideration for a driver, having no transformer , effectively all band
from audio up ? , the on-frequency aspect is compelling ..
73-G,
--------------------------------------------------
From: "DK7FC" <selberdenken@posteo.de>
Sent: Monday, May 29, 2017 2:53 PM
To: <rsgb_lf_group@blacksheep.org>
Subject: Re: LF: Iron dust toroids and heating/H bridge
80 watt, yes that's a good driver.
Am 29.05.2017 15:45, schrieb Graham:
More of a power block, that would run on 136/477 with little
modification,
just one out put device and filter needed , low harmonic power levels
probably help ..
with a dedicated driver 'ic' , possible, fet's would have a longer
life span, )
may be power level control as well .. the on frequency aspect is
useful
Found a 80 watt 500 Khz inverter with H ic drive
Or just wind a transformer ..
Tnx-G
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