The 1:1 one I have on my dipole is made by bencher, not sure on the model
but when I looked it looks like they only make one model balun in a 4:1 or
1:1 configuration. I'm kind of surprised the cobra antennas come suggested
now with such an expensive one, I realize the Unadilla ones they used to
come suggested with aren't very good anymore but still, there are plenty out
there. Mine will handle up to 2K as well so price isn't anything to do with
power handling I don't know what price has to do with, the one I have even
has a rubber seal you screw the PL-259 connector against to help water tight
it. We still taped it up but that rubber seal is a very nice touch. Not sure
if it's rubber or what it is actually but still, it sure helps.
----- Original Message -----
From: "Tom Behler" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Tuesday, December 25, 2012 10:46 AM
Subject: Re: More on interfacing Cobra Ultralite Senior with Tentec 238A
manual tuner
> John:
>
> I'll do some checking for sure, and if you can tell me the brand and model
> number of the one you have, I'll check that specifically.
>
> Tom Behler: KB8TYJ
>
>
> -----Original Message-----
> From: For blind ham radio operators [mailto:[log in to unmask]]
> On Behalf Of John Miller
> Sent: Monday, December 24, 2012 11:54 PM
> To: [log in to unmask]
> Subject: Re: More on interfacing Cobra Ultralite Senior with Tentec 238A
> manual tuner
>
> I still think you could get a more reasonably priced balun if you looked
> just check reviews out there there is some real junk on the market. The
> 1:1
> one I have on a wire that was just put up NVIS here I'm sure has a 4:1
> counterpart and was about half that price new, I got it used for a price I
> couldn't pass up but it looks like great quality and has great reviews.
> ----- Original Message -----
> From: "Tom Behler" <[log in to unmask]>
> To: <[log in to unmask]>
> Sent: Monday, December 24, 2012 4:36 PM
> Subject: Re: More on interfacing Cobra Ultralite Senior with Tentec 238A
> manual tuner
>
>
>> Agreed, Steve.
>>
>> It's only another $80, and that might be well worth the price for not
>> having to worry about stray RF going who knows where.
>>
>> Thanks to all for helping me think this through.
>>
>> Tom Behler: KB8TYJ
>>
>>
>> -----Original Message-----
>> From: For blind ham radio operators
>> [mailto:[log in to unmask]]
>> On Behalf Of Steve Forst
>> Sent: Monday, December 24, 2012 2:33 PM
>> To: [log in to unmask]
>> Subject: Re: More on interfacing Cobra Ultralite Senior with Tentec
>> 238A manual tuner
>>
>> Tom,
>>
>> You can always try it without the other balun and see how it works, but
>> I think you are looking at RF in the shack and house. Also when
>> bring in the open wire into the shack, you need to be a lot more
>> careful in how you route it compared to coax.
>>
>> Geez, you got that big promotion, spring for the balun and some low
>> loss coax to connect between balun and tuner.
>>
>> 73, merry Christmas, Steve KW3A
>>
>> On 12/24/2012 2:27 PM, Tom Behler wrote:
>>> Thanks, John.
>>>
>>> Just for the record, I wrote to Joe (K1JEK), the maker of the Cobra,
>>> and he said that it probably would be best to go with the Balun
>>> Designs balun, since using the tuner without a balun outside of the
>>> shack might introduce the potential for more stray RF in the shack.
>>>
>>> Now, maybe he just wants to sell more baluns, but his argument does
>>> make some intuitive sense. I was just trying to see if I could save
>>> myself $80, by not getting the Balun Designs balun.
>>>
>>> Tom Behler: KB8TYJ
>>>
>>>
>>> -----Original Message-----
>>> From: For blind ham radio operators
>>> [mailto:[log in to unmask]]
>>> On Behalf Of John Miller
>>> Sent: Monday, December 24, 2012 1:59 PM
>>> To: [log in to unmask]
>>> Subject: Re: More on interfacing Cobra Ultralite Senior with Tentec
>>> 238A manual tuner
>>>
>>> The wing nuts are for a balun, the one thing to make sure of, is for
>>> the cobra antenna, you want a 4:1 balun, as long as that's a 4:1, not
>>> a 1:1 balun in there, you should be in great shape. I wouldn't think
>>> there would be any more or less RF one way as the other. I wouldn't
>>> worry about the power rating either, if the tuner can handle 2K the
>>> balun should be good for close to that and no way your amp should
>>> hurt it.
>>> ----- Original Message -----
>>> From: "Tom Behler" <[log in to unmask]>
>>> To: <[log in to unmask]>
>>> Sent: Monday, December 24, 2012 1:16 PM
>>> Subject: More on interfacing Cobra Ultralite Senior with Tentec 238A
>>> manual tuner
>>>
>>>
>>>> Hi, again all.
>>>>
>>>> My apologies:
>>>>
>>>> I should have given more complete info in my last post.
>>>>
>>>> First of all, the Tentec 238A is rated for up to 2000 watts, so I
>>>> would think I'd be ok in that regard, since the most my Ameritron
>>>> AL811H puts out is about 600 watts.
>>>>
>>>> Second, here's a more complete set of instructions about antenna
>>>> connections:
>>>>
>>>> For balanced feedline systems, adding a jumper from SINGLE WIRE to
>>>> one of the BALANCED LINE terminals as shown on the rear panel is
>> required.
>>>> A tin-plated steel jumper for this purpose has been provided.
>>>> It is attached to one wing nut connector on the back; if balanced
>>>> line will be used, attach the other side of the jumper to the other
>>>> wing nut. Then connect the feedline to the two BALANCED LINE terminals.
>>>> ANT position 4 can be coax, single wire, or balanced line. ANT 1,
>>>> ANT 2, ANT 3 must be coax only.
>>>> Please note that 238C does NOT allow for the connection of either
>>>> coax-fed and balanced line or single wire antennas to the ANT 4
>>>> connection at the same time. There is no switchable configuration
>>>> for ANT 4 - any antennas connected to these jacks will be in use. If
>>>> you have a coax fed antenna and a balanced line or single wire
>>>> antenna connected to ANT 4 at the same time, both of these antennas
>>>> will be in use when ANT 4 is selected from the front panel."
>>>>
>>>> In light of this new info, would I still be ok without the Balun
>>>> Designs balun, as far as anyone can tell?
>>>>
>>>> On the negative side, would using just the tuner and the antenna
>>>> without the additional Balun Designs balun possibly lead to more
>>>> stray RF in the shack?
>>>>
>>>> 73 from Tom Behler: KB8TYJ
>>>>
>>>
>>>
>>>
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