[TenTec] 422 Centurion Keying Loop (Speer, Douglas)

[Speer, Douglas]

Carl and Jim,
Thanks for the replies / help.  Carl enabling the loop did not do the trick on the Omni VII.  Back when I first discovered the problem, Paul walked me through the checks to make sure I had everything connected correctly and menus set up correctly.  It was all correct.  There is a keying voltage problem with my Omni VII that shorting the diode is supposed to fix.

Jim,
Thanks, looking at the QSK board schematic, D2 does make more sense than D4.  I was close,  hihi.  I'll consider the case closed.  Thanks again.


Message: 4
Date: Mon, 13 Mar 2017 13:36:47 +0000
From: "Speer, Douglas" <Douglas.Speer at cns.doe.gov>
To: "tentec at contesting.com" <tentec at contesting.com>
Subject: [TenTec] 422 Centurion Keying Loop
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	<dfe07fab617e4a5fbc0cb1b276e9a8b4 at UPTXPWEX02D.onenet.cns.doe.gov>
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I have lost an e-mail I got from Paul Clinton from a couple years ago.  Using the keying loop of the 422 Centurion with an Omni VII I am unable to key the amplifier.  PTT connections work fine and the keying loop worked fine with an Orion II.  Paul told me to short one of the diodes on the QSK board to enable the keying loop to work correctly with the Omni VII.  I cannot remember which diode.  I'm thinking it might be D4.  At the time I did not really have a need to drive the amp with the Omni so I never made the mod but now I do so.  Can any of you more technical than me forum members confirm it is likely the D4 diode on the QSK board or re-direct me?

Very 73,
Doug, W9PN/5
Amarillo, TX


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Message: 5
Date: Mon, 13 Mar 2017 10:53:39 -0400
From: Carl Moreschi <n4py3 at earthlink.net>
To: Discussion of Ten-Tec Equipment <tentec at contesting.com>
Subject: Re: [TenTec] 422 Centurion Keying Loop
Message-ID: <58C6B273.3080705 at earthlink.net>
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Can't you just enable the keying loop with the menu setting for it?

Carl Moreschi N4PY
58 Hogwood Rd
Louisburg, NC 27549
www.n4py.com

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Message: 6
Date: Mon, 13 Mar 2017 08:20:20 -0700
From: Jim Carragher <k7ikn2 at gmail.com>
To: n4py3 at earthlink.net, 	Discussion of Ten-Tec Equipment
	<tentec at contesting.com>
Subject: Re: [TenTec] 422 Centurion Keying Loop
Message-ID:
	<CAAoH+tTGz8AMryQSuKYg5BWyYJwVaCGVWbbcA8kZ3FFa4foR1Q at mail.gmail.com>
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I had the same problem. Put the jumper across D-2 per his instructions I received. Works great.

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