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

To: [email protected]heep.org
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
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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

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