[R-390] Baluns Caps and Ballasts

[rbethman]

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                 |
+------------------------------------------------------------------+
|               http://home.comcast.net/~rbethman/                 |
+------------------------------------------------------------------+
| Bob Bethman                \\\|///     " The absence of a danger |
|                           \\ ~ ~ //      signal does *NOT* mean  |
| rbethman at comcast.net      (/ @ @ /)      that everything is OK " |
+----------------------o00o---°(_)°---o00o-------------------------+