[TenTec] Built in SWR meter bannans

[Rick - DJ0IP / NJ0IP]

Bob,

On the 8231 and 8232, do you know how many beads each type uses?
Do you know exactly which bead is used?

73
Rick

-----Original Message-----
From: TenTec [mailto:tentec-bounces at contesting.com] On Behalf Of Bob McGraw
- K4TAX
Sent: Monday, April 22, 2013 3:26 AM
To: Discussion of Ten-Tec Equipment
Subject: Re: [TenTec] Built in SWR meter bannans

Semantics.......be it a UNbalanced to UNbalanced Balun, RF Common Mode
Choke, 1:1 balun, RF Choke or whatever, yes the objective is to provide a
high Z for circulating current on the outside of a coaxial feed.  Most SWR
devices can not deal with outside circulating currents.  The basic
description of the problem does indicate a coaxial line is being used since
there is reference to SWR values as measured with internal means.

I've had very good success with the #8232 wired model and the #8332 kit
model from The Wireman.  These are the better choices if any anticipation of
160M operation is expected.

As to the discussions between W2DU and W1ICP, I'll add in those further
discussions by W2FMI.


73
Bob, K4TAX






----- Original Message ----- 
From: "Kim Elmore" <cw_de_n5op at sbcglobal.net>
To: "Discussion of Ten-Tec Equipment" <tentec at contesting.com>
Sent: Sunday, April 21, 2013 7:23 PM
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
>>> _______________________________________________
>>> TenTec mailing list
>>> TenTec at contesting.com
>>> http://lists.contesting.com/mailman/listinfo/tentec
>>>
>>
>>
>> _______________________________________________
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>
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