[R-390] Baluns Caps and Ballasts

[rbethman]

Precisely!

Now we have done away with *irrelevant", I.E., * Smoke and Mirrors*!

The dipole must be the proper height above ground, a very good ground, 
and a *perfect*, (no loss), balun or choke to go from 73 ohms to 50 
ohms, have no loss in the 50 to 120 Ohm balun.  Haven't EVEN addressed 
feed-line losses!

The dipole is also good at ONE, or a VERY small frequency range.

Don't look behind the curtain - OMG! The RADIO is 60 years old!

Bob - N0DGN

On 7/20/2011 10:16 PM, Cecil Acuff wrote:
> You do the alignment through the Balun.  It does the 50 ohm to 120 ohm 
> impedance matching if wound properly.
>
> Sure the most ideal situation would be to have twinax all the way to 
> the feed point on the dipole but that's not how most are equipped 
> these days...
>
> Unless you build it yourself you will have a 50 or 75 ohm unbalanced 
> antenna system.  There is a bit to be gained by using the Balun but 
> not as much as using a balanced antenna system.
>
> Cecil..
> ----- Original Message ----- From: "rbethman" <rbethman at comcast.net>
> To: "R-390 HF Receiver List" <r-390 at mailman.qth.net>
> Sent: Wednesday, July 20, 2011 6:02 PM
> Subject: Re: [R-390] Baluns Caps and Ballasts
>
>
> 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
>