I have been using an older Centurion with my Omni VI (Option 3) for
years with no such problem. I have not done this mod.
Jim N4AL
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Date: Sun, 16 Dec 2007 10:39:04 -0600
From: <atrampler@att.net>
Subject: [TenTec] Centurion QSK board Mod
To: "Discussion of Ten-Tec Equipment" <tentec@contesting.com>
Message-ID: <001d01c84002$2c12a1f0$6400a8c0@ouropteron>
Content-Type: text/plain; charset="iso-8859-1"
I purchased a Centurion that was being used with an Orion. The previous owner had made the mod recommended by Ten-Tec:
"Note for older 422 Centurion amp owners: Using an older Centurion with the newest
Ten-Tec HF transceivers - Pegasus, Jupiter, and Orion - may require a small modification
to the QSK board in older Centurion amps for proper QSK CW keying. Short diode D2 (red
diode, 1N4148, next to Q1) with a jumper wire. The current 422B does not require this
modification."
I have an Omni VI. Should I undo that modification, or is it benign? Could it
be the cause of the buzzing I detect at the relay?
Any thoughts are appreciated.
Art, K?RO
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