[TenTec] Built in SWR meter bannans

[Kim Elmore]

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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