[TenTec] RF Getting back into Rig Problem

[Ron Castro]

One thing I would add:  I found RF getting into me O2 primarily through the 
headphone connector and the CW paddles connector on the back panel. 
Ferrites on each fixed the problem  I had no problem with RF on the mic, 
although the input to the W2IHY 8-Band did have a problem on 10 meters when 
I cut the cable to the right length for the shack, which turned out to be 
8'...a nice quarter-wave on 10!  Duh!  A ferrite fixed that, too.

I should by stock in Amidon....

Ron N6AHA


----- Original Message ----- 
From: "Dave Tipton" <dave at lodave.org>
To: "Discussion of Ten-Tec Equipment" <tentec at contesting.com>; 
<k3ndm at verizon.net>
Sent: Monday, March 20, 2006 9:32 AM
Subject: Re: [TenTec] RF Getting back into Rig Problem


> Thanks to all for your suggestions.  It seems that this is a fairly common 
> issue.  Here are the things I've gleaned.
>
>  1)  Antenna, albeit resonant, being so close to the shack (20 feet 
> overhead) may be apt to coupling to ground in the rain.
>  2)  Toroids, Toroids, Toroids.  At least 1 for each input to the rig, 
> including on the power leads.
>  3) I need to install an earth ground, and potentially share it with my 
> satellite TV's ground.
>  4)  TenTec needs to seriously look at this issue, because it sounds like 
> it's a VERY common one and maybe indicative of a design flaw.
>
>  In regards to number 4, I still love this rig.  I will not be giving it 
> up any time soon.  Just need to make some mods to the way things are set 
> up.
>
> G <goofyham at highstream.net> wrote:
>  I had a problem with my O1 & O2 with the TT 706 mic. Key stuck and RF in 
> the
> audio. I found that when I pointed the beam right over the shack the
> problems started. I was able to eliminate almost all the problems by 
> taking
> the 706 mic apart and using kitchen foil placing it around the little PC
> board pre amp and leaving a tab to put under one of the bottoming mounting
> screws, that grounded the foil. I first put black tape on the board to
> insulate it from the foil. Yes, the shack is grounded to a common 2, 8 
> foot
> ground rods 5 feet apart.
> I also found last year when I had the key stuck problem it turned out to 
> be
> the PTT button switch. It was bad. Had to bang on it to get back to 
> receive.
> My 2 cents.
> George
>
>
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