I'll give a listen tonight, Stefan, if you are still in QRP mode.
Doug
On 1/11/12, Stefan Schäfer <[email protected]> wrote:
> LF,
>
> Last night i shot my PA again :-( No replacement FETs were available so
> i had to stay quite during the night. Replacement parts are ordered now
> and will arrive tomorrow :-)
>
> During that time i will run a *LF beacon on 136.172 kHz running _1W TX
> power_ in DFCW-90*, starting in the afternoon. If someone can receive
> that weak *QRPP* signal, then a* report is very apprechiated :-)*
>
> Also i will do some optimisations on my recently posted PA output stage
> (http://dl.dropbox.com/u/19882028/LF/DK7FC_137kHz_TX_antenna_and_PA_schematic.jpg),
> just in case someone wants to build a similar design and is interested
> in general:
>
> -R= 100 Ohm/2W (In series with C, across Drain-Source)
> -C= 220pF/WIMA FKP-1 2kV (In series with R, across Drain-Source)
> -MOSFET: The IRFP460
> <http://dl.dropbox.com/u/19882028/Datenbl%C3%A4tter/irfp460.pdf> will be
> replaced by a SPW20N60C3
> <http://dl.dropbox.com/u/19882028/Datenbl%C3%A4tter/SPW20N60C3.pdf> :-)
>
> 73, Stefan/DK7FC
>
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