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[TenTec] Intermittent loss of sensitivity on Orion 566 upon PTT switchin

To: tentec@contesting.com
Subject: [TenTec] Intermittent loss of sensitivity on Orion 566 upon PTT switching
From: md.schatzberg@gmail.com
Reply-to: Discussion of Ten-Tec Equipment <tentec@contesting.com>
Date: Fri, 20 May 2016 17:34:23 -0400
List-post: <tentec@contesting.com">mailto:tentec@contesting.com>
Hello Ten Tec Fans

My normally reliable O2, sometimes returns from transmit to receive with a 
lower sensitivity.  Switching back to transmit, and again to receive, the 
normal sensitivity returns.

It appears as if I have a dirty contact on a relay, and have to exercise it for 
better contact.

Looking at the schematics, I see there is a reed relay, K6, which appears to 
perhaps be the most likely candidate to be at fault.  This relay is on the A1 
board, the low pass filter board.

Before I take everything apart, and start looking (there are no pictorials for 
component placement information), has anyone had a similar problem with their 
O2?  Any information as to board location, and degree of difficulty in removing 
this relay, if indeed it was your issue, would be appreciated.

I guess since this radio is circa 2006, and I use QSK switching, and always use 
VOX, I can’t be too surprised that this high speed relay might need replacement 
by now.

Thank you for any possible input.

73,

Mike
W2AJI
Sent from my iPhone
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