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From: =?iso-8859-1?Q?VIGILANT_Luis_Fern=E1ndez?= <luis@vigilant.es>
To: "rsgb_lf_group@blacksheep.org" <rsgb_lf_group@blacksheep.org>
Thread-Topic: LF: LU1DOW soon in MF/LF
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Date: Tue, 13 Mar 2018 10:28:55 +0000
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Content preview: Hi Chris, LF Oscar answered the question. I'll try to translate,
but can't promise not to make a mistake in tube terminology :-) He is not
using filament choke as this is a direct heating tethrode. So the midpoint
of the filament transformer secondary is connected to ground The driving
is to the grid with a tuned circuit. It works in C class for QRSS and B Class
for DFCW. And YES, this a dangerous high voltage bricolage and a waste of
energy. Just the filament is sucking 35.5 Amps :-O [...]
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Subject: RE: LF: LU1DOW soon in MF/LF
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Hi Chris, LF
Oscar answered the question. I'll try to translate, but can't promise not to make a mistake in tube terminology :-)
He is not using filament choke as this is a direct heating tethrode. So the midpoint of the filament transformer secondary is connected to ground
The driving is to the grid with a tuned circuit. It works in C class for QRSS and B Class for DFCW. And YES, this a dangerous high voltage bricolage
and a waste of energy. Just the filament is sucking 35.5 Amps :-O
Oscar plans to test first single carrier in LF with LU8YD at 1000Km first to check if all is going as in previous tests some time ago. After that he will switch
to MF and test again
73 de Luis
EA5DOM