Re: LF: Better picture of the 807 based 500kHz TX

[Stefan Schäfer <Stefan.Schaefer@iup.uni-heidelberg.de>]

Hi Dimitris,

Tubes for PAs is not my world (generation) but the topic is most 
interesting and the webpage too.
Good luck and i hope to see some traces from you some time, at 
constructive QSB :-)
73, Stefan/DK7FC

Am 18.12.2012 22:07, schrieb Dimitrios Tsifakis:
> By the way, here is my current 40 m 807 transmitter.This was the first
> attempt at building a valve TX.
>
> people.physics.anu.edu.au/~dxt103/valves/807/
>
> I will use the same type of chassis for the 472 kc version but I will
> use an old 450-0-450 (50 mA), transformer which also has a 225-0-225
> and 6.3 windings, for a more compact result. My hope is that I can
> draw a bit more than 50 mA without overheating the transformer and is
> based on the fact that CW is not 100% duty cycle and also I am not
> using the other windings to their maximum current ratings.
>
> 73, Dimitris VK1SV
>