Message-ID: <37A70DF7.EBC59AB1@club-internet.fr>
Date: Tue, 03 Aug 1999 15:43:09 +0000
From: "sovergne" <sovergne@club-internet.fr>
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To: rsgb_lf_group@blacksheep.org
Subject: Re: LF: Kit information
References: <37A6EDC4.89A28C1E@club-internet.fr> <37A6D9E7.530D5FD7@bellatlantic.net>
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TNX Andre,


I'll have a look at this today. The antenna is in good shape. I just
have to pull it up slightly more at the north-west corner. It works very
well with the broadcast stations (BBC Radio 4 on 198 kHz is 59+60 dB
with -20 dB on the attenuator and I'm in the south-west of France [JN04PX]).

I'll be listening to the beacon this evening. Can you send me some
photos and an article about it? I'll publish it in the French CQ; that's
how promoting LF goes, HI!

73, Mark, F6JSZ

Andre' Kesteloot a *crit :
> 
> sovergne
> Mark, F6JSZ
> Editor, French CQ magazine wrote:
> 
> > France's regulatory authority has accepted the use by amateurs of the
> > 136 kHz band, but the text has not yet been published in the Official Journal.
> 
> congratulations  :-)
> 
> > Does anybody know about some transmitter kits available for 136 kHz? I
> > would love to build a transmitter (plenty designs on the Web, TNX G3YXM
> > & Co.), but I won't have the time to do this.
> 
> G0MRF has created a 250 watt kit which I have built. I run it on 48 volts DC
> (instead of 24) and get easily 300 watts + (had to rewind the output transformer
> to add more turns, of course)
> look up:
> http://www.g0mrf.freeserve.co.uk/projects/lf.htm
> 
> That kit is a class B amplifier, hence you will be able to use it if/when you
> start transmitting BPSK.
> 
> If you are only interested in CW, a class D or E amplifier will work well.
> 
> You could also buy a ready-built 160 watt Tx made by a Dutch company, under the
> name of "The First".  It has a class D power amplifier, and we use it here at the
> WA2XTF 136.750 beacon. It works very well, and my only criticism is that it is
> crystal-controlled, and the crystal is soldered on the board. Opening the box and
> changing the crystal are not exactly easy tasks to perform. Replacing the crystal
> with an external Digital VFO would be the way to go.
> 
> Good luck
> Andre' N4ICK