Return to KLUBNL.PL main page

rsgb_lf_group
[Top] [All Lists]

LF: Further QRPpp tests on 500kHz - TX power reduced another 10dB

To: [email protected]
Subject: LF: Further QRPpp tests on 500kHz - TX power reduced another 10dB
From: Roger Lapthorn <[email protected]>
Date: Mon, 14 Sep 2009 15:52:33 +0100
Dkim-signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:received:date:message-id:subject :from:to:content-type; bh=uMHLL9BeA/Qar3hKGt83Qj/jqXon+T2+9Lp0W01Qg+I=; b=Jnw4doEDPBZl2MT2uulNvn3O5+MEQJ2HIU9TTQ2/s8lqJHknofXYLSrzhawvGGeZSM 30LNVjiONMYJ57IaBY/Zfg1VqSCgHRy6vilRDXLBywsR2U31ktjWuJIuy9rUG1yxFHu8 Nbjfr+118TwvACHF5OLzHmTvv45MxyDrX/JR0=
Domainkey-signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:date:message-id:subject:from:to:content-type; b=ARvuvzasID4ajMpWoej1CibIQBwudpMraouV+saQJts58RhnLN3e3GfELwby0Phbk9 jcoeXln+2wlO76eUENmZO9KS2Z3aLpHuU4D/bRKlkTVar/B72iOTBkkrRaFMyb81NGid umRm+gixAOizVOVfr/9Gg/mYyuqvFFhxj8JNU=
Domainkey-status: good (testing)
Reply-to: [email protected]
Sender: [email protected]
This afternoon I fired up my 700mW 500kHz WSPR beacon and wet string (ERP microwatts) and got 3 reports from G3XVL at 61kms.

So, I tried putting a 6dB then a 10dB attenuator between the PA and the ATU. Even with the power from the PA of just 70mW (never mind what that would be as ERP from the antenna) he still gave me a -25dB S/N report! These were the three reports in reverse ordder:

 2009-09-14 14:42  G3XBM  0.503829  -25   1  JO02dg  0.001  G3XVL  JO02nb   61  112 
 2009-09-14 14:40  G3XBM  0.503827  -23   1  JO02dg  0.001  G3XVL  JO02nb   61  112 
 2009-09-14 14:36  G3XBM  0.503823  -18   1  JO02dg  0.001  G3XVL  JO02nb   61  112 

73s
Roger
G3XBM

--
-------------------------------------------------------------
http://g3xbm-qrp.blogspot.com/
http://www.g3xbm.co.uk
G3XBM    GQRP 1678      ISWL G11088
<Prev in Thread] Current Thread [Next in Thread>