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Topband: reversible Beverage v none reversible Beverage (answers)

To: topband@contesting.com
Subject: Topband: reversible Beverage v none reversible Beverage (answers)
From: Dennis OConnor <ad4hk2004@yahoo.com>
Reply-to: ad4hk2004@yahoo.com
Date: Mon, 17 Nov 2008 07:43:50 -0800 (PST)
List-post: <topband@contesting.com">mailto:topband@contesting.com>
The first question that comes to mind is whether the difference in signal 
strength is due to a fault on the Beverage, or a due to a difference in the 
signals from the two directions...
The comment that you need to ensure a stable termination at both ends is right 
on... Three 5 foot copper pipes driven in a triangle with about 6-8 foot 
spacing and augmented with a half dozen short radials will ensure a stable RF 
ground.
 (vast overkill, but anything worth doing is worth over doing)...
 
Then I would use a VOM to ring the coax pair - or relay if using a single coax 
- for continuity and shorts and proper operation of the relay (if any)...  IF 
the VOM check is OK then I use an MFJ259 and/or a noise bridge - and I have 
been known to put a resistor across the far end of the coax and use a low power 
signal and SWR meter -  to prove everything is OK at RF - ,.....
 
Then if you still feel there is a fault in the reverse direction I would 
reverse the installation... Swap the reflection transformer and the coax 
transformer ends... Take the HF rig and a battery out to the new feed point and 
check the signals... If now the low signal has swapped directions 180 degrees, 
then you know there is an RF fault in the transformers (assuming you have 
already rung the wires and transformers with a VOM for continuity)
 
I did not go through the back messages, so if I am duplicating others postings 
that is why...

denny / k8do


      
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