[TenTec] Orion 1 SWR

[jack]

without tuning my Orion's (565 both) show SWR of about 1.2 into the T8 log 
on several bands. tuning with the internal tuner can bring the SWR to 1.1 to 
1 on a couple bands.
jack
ak7o

-----Original Message----- 
From: Jeff (W4DD)
Sent: Thursday, October 18, 2012 8:54 PM
To: TenTec at contesting.com
Subject: [TenTec] Orion 1 SWR

Wondering if anyone has run across an Orion 1 with SWR that remains at 1.7,
even running into a 50 Ohm dummy load.  The problem appears to be on the CPU
board, not on the filter board or IF board.



In TUNE Mode (25W):

V_Fwd = 1.2V

V_Ref = .14V



I can ground the V_Reflected line prior to going into the CPU board (assures
ref power is zero) and the SWR remains at 1.7



If I ground the V_Ref line at the A to D converter, the SWR goes to 1.0



I've done a lot of checking and so far can't seem to determine where that
.14V is coming from.  Ideas appreciated.





Thanks,

Jeff W4DD



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