SM5KI:
>No heavy and big squirrel-cage fan needed. Light weight simple
> voltage doubler circuits instead of a heavy anode transformer. Using PL
> 509/519s TV sweep tubes instead with filaments in series from the mains, I
> could get rid of the relative heavy filament transformer as well. This could
> give some 6 - 8 db increase from the transceivers 100 W which is enough for
> the purpose. It works - PA0FRI described a DAF with four PL 519s in the
> 8/1992 issue of RSGBs RadCom page162 - he says it shows well in a two-tone
> test and on -the -air tests were encouraging. PL 509 = 40KG6A.
Hans,
I really like this idea! Let me know how it works out. One caution only, be
very careful with
saftey! A bit nasty if the chassis is at the same potential as the 240 V mains
phase lead....huh...
73 de Lars
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