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[TenTec] Hercules II anomaly?

To: <tentec@contesting.com>
Subject: [TenTec] Hercules II anomaly?
From: "Rick Williams" <rick.williams@telus.net>
Reply-to: Discussion of Ten-Tec Equipment <tentec@contesting.com>
Date: Mon, 6 Feb 2006 15:14:36 -0800
List-post: <mailto:tentec@contesting.com>
Well I have a new one?  I have recently noticed a discrepancy between the
SWR measured by my Orion (internal tuner disabled) and by my LDG DWM-4
wattmeter.  I've checked the LDG meter with my Bird and all seems okay.  So
I've tried to isolate the problem.

The problem disappears when I take the Hercules II out of the circuit.  My
problem occurs on 20 metres with the rig showing an SWR of about 2.5 : 1 and
the external meter about 1.4 : 1.  When I remove the Herc input and output
coaxes from the amp and connect them together with an Amphenol barrel
connector both meters read an SWR of about 1.4 : 1?  With power, control and
keying loop cables removed the problem still exists.

Of course all of this is happening with the Herc off and the only components
I can see in the circuit are the input relay - K1 and the vacuum relay.
Both are unenergized and normally closed with a DC resistance of less than
0.5 ohms.  I have checked 80 metres, 17 metres and 15 metres and the problem
does not occur there.  It seems confined to 20?

Thoughts appreciated.  Thanks.



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