Envelope-to: dave@picks.force9.co.uk Delivery-date: Sun, 19 Feb 2006 06:07:37 +0000 Received: by ptb-mxcore01.plus.net with spam-scanned (PlusNet MXCore v2.00) id 1FAhjL-0007BF-QX for dave@picks.force9.co.uk; Sun, 19 Feb 2006 06:07:37 +0000 Received: from post.thorcom.com ([193.82.116.20]) by ptb-mxcore01.plus.net with esmtp (PlusNet MXCore v2.00) id 1FAhjL-0007AF-L7 for dave@picks.force9.co.uk; Sun, 19 Feb 2006 06:07:35 +0000 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1FAhj9-0003AQ-0k for rs_out_1@blacksheep.org; Sun, 19 Feb 2006 06:07:23 +0000 Received: from [193.82.116.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1FAhj8-0003AH-Ij for rsgb_lf_group@blacksheep.org; Sun, 19 Feb 2006 06:07:22 +0000 Received: from defout.telus.net ([199.185.220.240] helo=priv-edtnes46.telusplanet.net) by relay1.thorcom.net with esmtp (Exim 4.51) id 1FAj9N-0004pj-8L for rsgb_lf_group@blacksheep.org; Sun, 19 Feb 2006 07:38:48 +0000 Received: from cognizant1 ([64.180.173.28]) by priv-edtnes46.telusplanet.net (InterMail vM.6.01.05.04 201-2131-123-105-20051025) with SMTP id <20060219060700.KIS15573.priv-edtnes46.telusplanet.net@cognizant1> for ; Sat, 18 Feb 2006 23:07:00 -0700 Message-ID: <003301c6351a$f1bc2920$0201a8c0@private.network> From: "Scott Tilley" To: rsgb_lf_group@blacksheep.org References: Date: Sat, 18 Feb 2006 22:08:46 -0800 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1106 X-MIMEOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Subject: LF: Re: VE7TIL transmission Content-Type: text/html; charset=windows-1252 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-PN-SpamFiltered: by PlusNet MXCore (v2.00) Content-transfer-encoding: 8bit

Markus/Hartmut

My key down tests show I need to do considerable work on the antenna matching situation as after ~18 minutes the double 3C86 saturates... Steve is winding up a 'super' xfmr for the VA7LF station that we'll test here soon.

Also, I have a bolt on the antenna that is producing a coronal discharge... That needs to be rounded off as well...

And, I was getting complaints by Steve that I was QRMing the waterhole 50km away...

I desided to go QRT before something or someone blew up ;-)

Scott

----- Original Message -----

From: MarkusVester@aol.com

To: rsgb_lf_group@blacksheep.org

Sent: Saturday, February 18, 2006 5:42 PM

Subject: LF: VE7TIL transmission

Scott,

>> TIL will go into key down mode on 137778.00Hz and will phase shift on the following sked starting at 0100UTC. H, H+15, H+30, H+45<<

ok, all set up for monitoring, including NPG Dixon on the lowest grabber trace. Good luck!

>> As a side note the combined stages are far more stable then a lone stage... The DC input current varies 1/2 as much as a lone stage with antenna variations in the wind... I expect this to improve even further with the 4 port combiner used for the 2KW version.<<

- a very interesting point. Would that imply it is possible to partly absorb load reflections in the combiners? I had always thought that you'd need a nonreciprocal device like a circulator for that purpose - which might be sort of bulky at LF ;-) The reduced effect on current could possibly be due to a different phase of the reflection coefficient.

73, hope to see you before meltdown ;-)

Markus, DF6NM