Return to KLUBNL.PL main page

rsgb_lf_group
[Top] [All Lists]
<prev [Date] next>
[Advanced]
 <prev [Thread] next>

Re: LF: QRP 1W /PA circuit

from [Chris 4X1RF] [Permanent Link][Original]
To: [email protected]
Subject: Re: LF: QRP 1W /PA circuit
From: Chris 4X1RF <[email protected]>
Date: Wed, 11 Jan 2012 23:51:40 +0200
Cc: Stefan Schäfer <[email protected]>
Dkim-signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type; bh=MpLXdltZSb8/CpMYbpy4YegsEOy5BX4U5V4paJY5vvg=; b=Z7AFwzoMSwbvEC3oHDYrnxA1DZKvJ+b3tQdqDpko/EBp2Qf1vzuJ5cw/vC+0u2qr7g p++R/06C7Ck26VxD9D7UPIFAp9wK12/KwV37qHGqBFd01ym8DKDoCZFkNNc+ktSgGCkn vqEePMEMkXwnuhoT4NY6CMkVzM3t6mevaEwgs=
In-reply-to: <[email protected]>
References: <CAA8k23Qqo4ZagVGLdEiUqGSU-HL_XNpues+rPAr7NwOhiyd1zQ@mail.gmail.com> <[email protected]> <[email protected]>
Reply-to: [email protected]
Sender: [email protected]
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 Schäfer <[email protected]>
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 will be replaced by a SPW20N60C3 :-)

73, Stefan/DK7FC

[More with this subject...]
<Prev in Thread] Current Thread [Next in Thread>
Previous by Date:  Re: LF: Tuning inductance for 137kHz receive., Martin Evans
Next by Date:  LF: RE: RE: Uninstalling OPERA?, Steinar Aanesland
Previous by Thread:  Re: LF: RE: QRP 1W /PA circuit, Stefan Schäfer
Next by Thread:  LF: DK7FC Report [Was QRP 1W /PA circuit], Dave G3WCB.
Indexes:  [Date] [Thread] [Top] [All Lists]