Date: Tue, 13 Mar 2018 22:11:36 +0000
From: Chris Wilson <dead.fets@gmail.com>
Message-ID: <1645081980.20180313221136@gmail.com>
To: =?iso-8859-1?Q?VIGILANT_Luis_Fern=E1ndez?= <rsgb_lf_group@blacksheep.org>
CC: dead.fets@gmail.com
In-Reply-To: <579355A36AEE9D4FA555C45D556003AB9ABB2634@servigilant.vigilant.local>
References: <579355A36AEE9D4FA555C45D556003AB9ABB1B77@servigilant.vigilant.local> <244965788.20180312101810@gmail.com> <579355A36AEE9D4FA555C45D556003AB9ABB2634@servigilant.vigilant.local>
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Subject: Re: LF: LU1DOW soon in MF/LF
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Hello Luis,

Thanks to you and Oscar. Yes of course, it's a tetrode niot a triode
so no need for the filament choke. It looks a nice bit of construction
and should whack out a good signal!

Tuesday, March 13, 2018, 10:28:55 AM, you wrote:

> 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


-- 
Best regards,
 Chris                            mailto:dead.fets@gmail.com