[TenTec] Major sudden shift in frequency?

[art N4UC]

Same problem here last year, first noticed in main rcvr but not the sub. I did all the same things that you describe, several times actually, none of which had any effect on the problem.  At first there was the sudden shift, then it was more of a warbling like an oscillator going unstable. Finally sent it off to TT but they said it couldn't be fixed. They finally deemed it was the victim of lightning damage, but I have my doubts about that. But I have now placed it in the junk pile and thanks to the lightning letter they wrote me I am shopping for a new radio.

Good luck.

73, Art N4UC

> Date: Tue, 31 Mar 2015 19:35:08 -0400
> From: hglent at frii.com
> To: Rick at DJ0IP.de; tentec at contesting.com
> Subject: Re: [TenTec] Major sudden shift in frequency?
> 
> Thanks for the quick reply and advise,
> 
> Here is a list the stuff I've done in the past week or so.
> I have done several Master Resets and also re loaded the operating 
> software.  I have also removed all the boards, exercised all slide type 
> connectors (white wired etc. connectors) including the mini coax 
> connectors, cleaned the connectors, cleaned all the screw bases, 
> re-tightened all mounting screws and changed all the batteries plus 
> recapped the power board.
> 
> I think I have covered most of the common problems that plague Ten Tec 
> equipment.
> 
> My feeling is the TCXO has failed.  ???  Has anyone had this failure?  
> If so, any advice on availability of parts and installing, etc.?
> 
> Paul K. WA0BAG
> 
> -----Original Message-----
> From: TenTec [mailto:tentec-bounces at contesting.com] On Behalf Of Paul K.
> Sent: Monday, March 30, 2015 11:02 PM
> To:tentec at contesting.com
> Subject: [TenTec] Major sudden shift in frequency?
> 
> Fellow Ten Tec folks,
> This morning while receiving on 40 Meters, my Orion 1 made a sudden
> frequency shift downward.  I saw the continuation of the other station
> instantly re appear down frequency about 5 KHz. Sure enough, I tuned down
> there and continued  and finished the contact.  The shift was from 7.265MHz
> down to about 7.260MHz. After the end of the contact I began tuning the sub
> receiver, (the original sub receiver) looking for WWV on
> 10.0 MHz.  Again, I found WWV down in frequency about 9.995MHz.  I made
> several switches between CWU and CWL until I very closely match the tones.
> The match came at 9.99457MHz.  When the shift in frequency occurred there
> was no change indicated on the display.  I found the signal by tuning down
> to it with the proper frequency displayed on screen.
> 
> I took the bottom cover off the Orion 1 and proceeded to make adjustments to
> the Y1, 44.55MHz oscillator.  I found I can only swing the Y1 oscillator
> about 38Hz.
> 
> Have any of you experienced a sudden shift similar to what I described?
> If so, has the problem traced to the Y1 Oscillator? Also have any of you
> replaced the Y1 44.55MHz oscillator module?
> 
> If you can help with advice or information please, in addition to responding
> on list, email me off list, as I read this list only in digest form.
> 
> Thanks you all for help on this.
> 
> TNX  ...  es  ...  73  ...  de  ...  WA0BAG  . .
> --
> Paul K. WA0BAG
> 
> 
> 
> 
> _______________________________________________
> TenTec mailing list
> TenTec at contesting.com
> http://lists.contesting.com/mailman/listinfo/tentec