[TenTec] Model 544 TX/RX changeover problem

[N4EKV]

Ed,

Thanks for that tip!  A little DeOxit on the T/R-RX antenna switch really
woke up the receiver.  S meter readings are higher now, and I'll let you
know if it also fixed the TX/RX changeover problem which had become
intermittent prior to this fix.


73,

Adam N.
Martinez, California
www.n4ekv.com

----- Original Message ----- 
From: "Edward Crawford" <w4wvw at msn.com>
To: "N4EKV" <adam at n4ekv.com>; <tentec at contesting.com>
Sent: Sunday, February 01, 2004 3:57 AM
Subject: [TenTec] Model 544 TX/RX changeover problem


The first thing I would do, if you haven't already, is look at the T/R-RX
antenna switch on the rear.
Just work it back and forth a few times. These can cause receiver muting
when the contacts get dirty.
Worth a try.
73. Ed/w4wvw
  ----- Original Message ----- 
  From: N4EKV<mailto:adam at n4ekv.com>
  To: tentec at contesting.com<mailto:tentec at contesting.com>
  Sent: Saturday, January 31, 2004 2:34 AM
  Subject: [TenTec] Model 544 TX/RX changeover problem


  I have a nice Model 544 that just developed a transmit/receive changeover
  problem that I need some assistance diagnosing.

  All was working FB in QSO on 75m LSB when I unkeyed the mic and the
S-meter
  went near full scale with RX sigs very muted.  Powering off/on the radio
  fixed the problem until I keyed up again, and then the problem reoccured.
  Maybe a T/R relay is sticking or dirty?  I believe this rig has a reed
relay
  and a second relay though I'm unsure which would cause this problem and
what
  corrective measure to take once identified.

  Thanks in advance,


  73,

  Adam N.
  Martinez, California
  www.n4ekv.com<http://www.n4ekv.com/>



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