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LF: 'JNT WSPR

To: [email protected]
Subject: LF: 'JNT WSPR
From: Andy Talbot <[email protected]>
Date: Sun, 1 Feb 2009 17:26:13 +0000
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Why are you reporting such a low SNR, Jim ? Power was 23dBm (in spite
of what it says in the message - didn't reset it after yesterday)
I'm hitting the PA as hard as possible and RF is around the150 Watts
region.   You had positive reports on my sigs the other day

This broadband PA is rated for 200 Watts, but as it is specified for
0.5 to 40MHz, is right at the very bottom of its spec range.  The
antenna appears to have an input R of 31 ohms at the moment and this
impedance is reflected through a 5th order Elliptic LPF, and appears
as a higher Z at the load for the PA, hence, presumably, the reduced
Pmax.

Andy  G4JNT
www.g4jnt.com


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