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	<PAEFLMFGBDKKCONLMLBICEBLDHAA.ganymede444@btopenworld.com>
Date: Thu, 12 Jan 2012 10:12:21 +0200
Message-ID: <CAK59VFOHz1eYwzgkjkpOaKG+ZKhVpy_FmGepx8ypShU5MW6F-A@mail.gmail.com>
From: Chris 4X1RF <chrisgomy@gmail.com>
To: rsgb_lf_group@blacksheep.org
Cc: =?ISO-8859-1?Q?Stefan_Sch=E4fer?= <Stefan.Schaefer@iup.uni-heidelberg.de>
Subject: Re: LF: DK7FC Report [Was QRP 1W /PA circuit]
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Stefan, LF,

Best reception was at local sunrise in YO:
http://dl.dropbox.com/u/10280270/YO/EU60_930_yo4x1rf_DK7FC_QRP_12JAN2012.jp=
g


73s
Chris 4X1RF


On 1/12/12, Dave G3WCB. <ganymede444@btopenworld.com> wrote:
> Stefan,
>
> A trace of your signal visible here tonight. See attached.
>
> 73, Dave G3WCB IO91RM
>
>
>   -----Original Message-----
>   From: owner-rsgb_lf_group@blacksheep.org
> [mailto:owner-rsgb_lf_group@blacksheep.org]On Behalf Of Chris 4X1RF
>   Sent: 11 January 2012 21:52
>   To: rsgb_lf_group@blacksheep.org
>   Cc: Stefan Sch=E4fer
>   Subject: Re: LF: QRP 1W /PA circuit
>
>
>   Stefan,
>
>   Signal clearly visible in YO:
> http://dl.dropbox.com/u/10280270/yo4x1rf_DK7FC_QRP_1w_11jan2012.jpg
>
>
>   73s
>   Chris 4X1RF
>
>
>
>   2012/1/11 Stefan Sch=E4fer <Stefan.Schaefer@iup.uni-heidelberg.de>
>
>     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 a=
nd
> 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 sta=
ge
> (http://dl.dropbox.com/u/19882028/LF/DK7FC_137kHz_TX_antenna_and_PA_schem=
ati
> c.jpg), just in case someone wants to build a similar design and is
> interested in general:
>
>     -R=3D 100 Ohm/2W (In series with C, across  Drain-Source)
>     -C=3D 220pF/WIMA FKP-1 2kV  (In series with R, across Drain-Source)
>     -MOSFET: The IRFP460 will be replaced by a SPW20N60C3 :-)
>
>     73, Stefan/DK7FC
>
>
>