[TenTec] Built in SWR meter bannans

[Rick - DJ0IP / NJ0IP]

With openwire you can build a CMC choke just as easily as with coax.
Only thing is, you have to build two of them so it costs twice as much.

In fact you make your own coax CMC choke by placing beads over the coax and
coating with heat-shrink tubing... you can just tape two of these together
and use their center conductors for the connections.

    What's in a name? that which we call a rose
      by any other name would smell as sweet;

73
Rick, DJ0IP

-----Original Message-----
From: TenTec [mailto:tentec-bounces at contesting.com] On Behalf Of Kim Elmore
Sent: Monday, April 22, 2013 2:24 AM
To: Discussion of Ten-Tec Equipment
Subject: Re: [TenTec] Built in SWR meter bannans

Maybe "unun" and "balun" don't really apply here. Walt Maxwell, W2DU, and
Lew McCoy, W1ICP, were famously at odds about whether the W2DU "balun" was
really a balun or something else. Walt said yes, Lew said no. What you want
to do, Jim, regardless of what we call it, is to alleviate the current on
the outside of the coaxial transmission line. 
The Wireman's product 8232 will do just that.

If it's common-mode current on ladder line that you have to wrestle, the
problem harder is harder in a practical sense even though the same
techniques still apply.

73,

Kim N5OP


On 4/21/2013 5:57 PM, Bob McGraw - K4TAX wrote:
> Sounds like RF current on the shield when on the antenna and not on 
> the dummy load.  I suggest a 1:1 UNUN balun between the amp and the 
> antenna. I've had good success with a product from The Wireman being 
> model #8232. Certainly worth a try.
>
> 73
> Bob, K4TAX
>
>
>
>
> ----- Original Message ----- From: "Jim GM" <jim.gmforum at gmail.com>
> To: "Discussion of Ten-Tec Equipment" <tentec at contesting.com>
> Sent: Sunday, April 21, 2013 11:13 AM
> Subject: [TenTec] Built in SWR meter bannans
>
>
>> I have a Tec Tec Auto Coupler that is turned off and a Ten Tec 
>> Hercules II at full power. The SWR bridges in side the equipment 
>> reads well over SWR over 3:1 on certain bands while my BIRD Watt 
>> meter read 2:1.
>>
>> ALL SWR meters is at 1:1 into a dummy load so that rules out the BIRD 
>> is whacked.
>>
>> This problem seams to mainly happen on 160M however I have seen it do 
>> this on different bands with other antennas in the past.
>>
>> Are the diodes going into saturation?  I am going BANNAS with this 
>> issue.
>>
>> --
>> Jim K9TF
>> _______________________________________________
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>>
>
>
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