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:[email protected]