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Re: LF: 137 WSPRing

from [Roger Lapthorn] [Permanent Link][Original]
To: [email protected]
Subject: Re: LF: 137 WSPRing
From: Roger Lapthorn <[email protected]>
Date: Thu, 23 Sep 2010 21:28:09 +0100
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I'd like to see the schematic Andy please, especially what you (and others) use for PA chokes and transformers. Sorry cannot TX or monitor until the weekend here (grandson QRM).

73s
Roger G3XBM

On 23 September 2010 21:01, Andy Talbot <[email protected]> wrote:
Has everyone turned off their monitors?    Plenty of reports from  four stations throughout the day at distances up to 376km (F5WK in JN18HP)  then all stop at 1740z. 
 
Still radiating, about 40W into the antenna now.   I've optimised the PA output by changing the transformer and added a few tap positions for loads from 50 to 150 ohms.   If there's any interest in this rather standard linear PA, I'l  write it up - if not, shan't bother.    The FETs would have to be substituted anyway.



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