[TenTec] Built in SWR meter bannans

[Walt K8CV]

Sorry, I find this a wee bit hard to swallow. I picture a big lump of large 
toroids, with two plastic pieces of coax jacket going through them, with one 
wire in each that connect to the open wire. This conglomeration is serving 
some useful purpose? The little RF electrons going NORTH to the antenna are 
passed by the gate keeper in the conglomeration? WOW, that's interesting, as 
to the little electrons reflected from the antenna he says " no, you can't 
pass "! Is there some magic DSP going on here? How does this toroid know all 
this? Have toroids become sentient and aware over night? I can see the 
scenario when the ( sic ) good RF is on the inside of a coaxial cable and 
protected from the toroid by the cable shield, getting to the antenna and 
the ( sic ) bad RF, ON THE OUTSIDE OF THE COAX SHIELD, getting stopped when 
they are reflected, but the open wire setup looks a little DODGY to ME! This 
is the month of APRIL, but not APRIL 1 :-) right ??

FLAME SUIT ON !!

Walt K8CV

----- Original Message ----- 
From: "Rick - DJ0IP / NJ0IP" <Rick at DJ0IP.de>
To: "'Discussion of Ten-Tec Equipment'" <tentec at contesting.com>
Sent: Monday, April 22, 2013 8:53 AM
Subject: Re: [TenTec] Built in SWR meter bannans


> Dave,
>
> Sorry, my memory failed me there.
> It was long ago that I did this.
> I had to search for my notes and drawings (file).  Found them.
>
> Actually I removed the center cable from coax, and discarded the shield 
> and insulation. Then I put two pieces in parallel and ran them through the 
> same beads; lots of beads.
> Then I covered it with heat-shrink tubing and fed the open wire into one 
> end, and connected the other end through a short coax stub to my antenna 
> tuner.
>
> So yes, I did use only the center of two pieces of coax, but they ran 
> through the same string of beads, not separate beads.
>
> 73
> Rick
>
>
>
> -----Original Message-----
> From: TenTec [mailto:tentec-bounces at contesting.com] On Behalf Of 
> d.e.warnick at comcast.net
> Sent: Monday, April 22, 2013 1:23 PM
> To: Discussion of Ten-Tec Equipment
> Subject: Re: [TenTec] Built in SWR meter bannans
>
>
>
> I don't understand. in coax you are increasing rhe impedence to the common 
> mode current on the shield, right? What would you be doing on the open 
> wire?
>
> 73
>
> Dave
>
> WA3F
>
>
>
> From: "Rick - DJ0IP / NJ0IP" <Rick at DJ0IP.de>
> To: "Discussion of Ten-Tec Equipment" <tentec at contesting.com>
> Sent: Monday, April 22, 2013 3:15:21 AM
> Subject: Re: [TenTec] Built in SWR meter bannans
>
> 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
>
>
>
> 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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