[R-390] Baluns Caps and Ballasts

[Dennis Wade]

Why would you not feed the 50 ohm unbalanced generator through the
balun for alignment, assuming you had confidence in the balun?

              Dennis

On Wed, Jul 20, 2011 at 4:02 PM, rbethman <rbethman at comcast.net> wrote:
> ONLY *IF* you do an alignment with a 120 Ohm signal generator.
>
> Do you see a 120 Ohm terminator/dummy antenna with the AN/URM-25 series?
>
> Sure wasn't part of the parts included.  Darn sure isn't in the NAVSHIPS
> Manual either.
>
> NAVSHIPS 0967-187-5010.pdf (A 35MB file.).
>
> Bob - N0DGN
>
>
>
> On 7/20/2011 6:53 PM, Dennis Wade wrote:
>>
>> Isn't the whole point of the balun to convert the *unbalanced* 50 ohms
>> to the *balanced* 125??
>>
>> Doesn't that solve the problem, assuming one feeds the antenna
>> properly, that is if feeding a balanced antenna (dipole) with coax
>> using some sort of choke or other type of balun to keep symmetry.
>>
>>               Dennis
>>
>> On Wed, Jul 20, 2011 at 1:16 PM, rbethman<rbethman at comcast.net>  wrote:
>>>
>>> Tisha, I hope you get some decent numbers using this balun.
>>>
>>> However, it is still based upon either an SO-239 or BNC input.
>>>
>>> That puts us back to the initial point of a feed-line that is unbalanced.
>>>
>>> I have a strong belief that "Flowertime" Roger using AN/URM-25s, a
>>> TS-505 D/U and a TS-585 has served very well.
>>>
>>> I just don't see adding an "extra" item into the antenna string is going
>>> to make it work better.
>>>
>>> Bob - N0DGN
>>>
>
> --
> +------------------------------------------------------------------+
> |               AM Amateur Radio Operator    NØDGN                 |
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> |               http://home.comcast.net/~rbethman/                 |
> +------------------------------------------------------------------+
> | Bob Bethman                \\\|///     " The absence of a danger |
> |                           \\ ~ ~ //      signal does *NOT* mean  |
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>
>



-- 
"If they trust you, it is an extraordinary privilege, and you simply
can't abuse it."
      - A. Alan Post  1914-2011.  California Legislative Analyst 1949-1977.

-------------------------
Dennis L. Wade
KG6ZI
Carmichael, CA