[TenTec] OMNI VI plus

[jbrannig]

Bob,Got itTnx JimSent from my Galaxy Tab® A
-------- Original message --------From: Bob McGraw K4TAX <rmcgraw at blomand.net> Date: 9/29/20  10:00 PM  (GMT-05:00) To: Discussion of Ten-Tec Equipment <tentec at contesting.com> Cc: jbrannig <jbrannig at verizon.net> Subject: Re: [TenTec] OMNI VI plus When I stated “clean connectors “ I didn’t say just a select few or ones.  They ALL should be cleaned.   The Q-Tip provides additional scrubbing action where as just applying any cleaner does not provide scrubbing action. When finished one will have a pile of dirty and black Q-Tips.  Bob, K4TAXSent from my iPhone> On Sep 29, 2020, at 8:33 PM, jbrannig via TenTec <tentec at contesting.com> wrote:> > 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 at gmail.com> Date: 9/29/20  8:48 PM  (GMT-05:00) To: Discussion of Ten-Tec Equipment <tentec at 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 at 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> > _______________________________________________> > TenTec mailing list> > TenTec at contesting.com> > http://lists.contesting.com/mailman/listinfo/tentec>> _______________________________________________> TenTec mailing list> TenTec at contesting.com> http://lists.contesting.com/mailman/listinfo/tentec>_______________________________________________TenTec mailing listTenTec at contesting.comhttp://lists.contesting.com/mailman/listinfo/tentec> _______________________________________________> TenTec mailing list> TenTec at contesting.com> http://lists.contesting.com/mailman/listinfo/tentec_______________________________________________TenTec mailing listTenTec at contesting.comhttp://lists.contesting.com/mailman/listinfo/tentec