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Re: [TenTec] OMNI VI plus

To: Discussion of Ten-Tec Equipment <tentec@contesting.com>
Subject: Re: [TenTec] OMNI VI plus
From: jbrannig via TenTec <tentec@contesting.com>
Reply-to: Discussion of Ten-Tec Equipment <tentec@contesting.com>
Date: Tue, 29 Sep 2020 21:31:24 -0400
List-post: <mailto:tentec@contesting.com>
Many good ideas....I have a service bench geared to tube radios, but usable for 
the OMNI.Sniffing for RF is a great start (after cleaning)I have to get my butt 
in gear and get serious about this.Tnx again and keep 'em coming...JimSent from 
my Galaxy Tab® A
-------- Original message --------From: Ken Brown <kenradiobrown@gmail.com> 
Date: 9/29/20  8:48 PM  (GMT-05:00) To: Discussion of Ten-Tec Equipment 
<tentec@contesting.com> Subject: Re: [TenTec] OMNI VI plus Check all the things 
that are common to both the transmit and receivefunction. If front panel 
indications all seem normal, VFO readout etc. youcan probably rule out power 
supply, or power distribution inside the rig(but not for certain) or the VFO 
PLL system. I'd check all of the bandpass filtering and cables that are in 
between theantenna port and the receiver front end. Maybe connect signal 
source(antenna) bypassing those filters and see if the receiver perks up.How to 
attack this problem is highly dependent on the tools you haveavailable. At the 
very least a general coverage receiver with some sort ofsniffer loop or probe 
would be helpful for listening for variousoscillators in the radio. A spectrum 
analyzer would be nicer. Do you have asignal generator? If so you can test 
whether you can input a signal to theIF stages and hear it.Find out what does 
work and keep checking until you find what doesn't. Canyou couple a 9 MHz 
signal into the receiver product detector and hear it?Can you couple a 6.3 MHz 
signal into the 6.3 MHz IF stages and hear that?Can you couple a 9 MHz signal 
into the first IF stages and hear that? Canyou hear the BFO with your general 
coverage receiver using a pickup loopnear the BFO? Can your general 
coverageCleaning contacts is a really good idea and likely to fix the 
problem.DE N6KBOn Tue, Sep 29, 2020 at 2:20 PM Bob McGraw K4TAX 
<rmcgraw@blomand.net>wrote:> Jim:>> How long has it been since the connectors 
internally were cleaned?> Likely never.   So it is time to unplug each one, 
scrub the male pins> with a Q-Tip with contact cleaner applied and plug it back 
in.    Do NOT> spray anything into the radio.>> 73>> Bob, K4TAX>> On 9/29/2020 
6:37 PM, jbrannig via TenTec wrote:> > My OMNI died suddenly.No signals on 
receive and no RF out on> transmitEverything else functions as normal..ie. 
frequency read out, audio> noise, bandchange...Any ideas on where to start 
looking?Tnx es 73JimSent> from my Galaxy Tab® A> > null> > 
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