[R-390] The Saga Pt 6 (Antenna Balun

[David Wise]

I've lost track of which tweak you're talking about.
The balance adjustment is moot unless you run balanced.
All other adjustments are meaningful however you run it.

Dave Wise 

>-----Original Message-----
>From: r-390-bounces at mailman.qth.net 
>[mailto:r-390-bounces at mailman.qth.net] On Behalf Of William A Kulze
>Sent: Tuesday, September 21, 2010 12:01 PM
>To: r-390 at mailman.qth.net
>Subject: Re: [R-390] The Saga Pt 6 (Antenna Balun
>
>I think the idea is for performance with an antenna. However 
>you do the alignment, the sig gen config is just to let you do 
>the adjustment, and I guess that's handy for getting 
>sensitivity numbers, but how's it work with an antenna? A 
>balanced line from the antenna to the balanced antenna input, 
>and the impression I get is that this adjustment comes into 
>play with a balanced feed. Most of the time I'm using my radio 
>with an antenna and not a sig gen.
>
>Bill W2NVD
>
>-----Original Message-----
>From: r-390-bounces at mailman.qth.net 
>[mailto:r-390-bounces at mailman.qth.net] On Behalf Of rbethman
>Sent: Tuesday, September 21, 2010 12:01 PM
>To: r-390 at mailman.qth.net
>Subject: Re: [R-390] The Saga Pt 6 (Antenna Balun
>
>  Bernie - I don't know what "improvement" will be seen.  It begins to 
>get into what specific Signal Generator is used, how its impedance is 
>effected, and other things.
>
>Roger R. will tell you that they spent their career(s) using 
>AN/URM-25(X) sig gens.  By their nature, they were issued with 
>a 50 ohm 
>Z "phantom/dummy" antenna.
>
>Nothing wrong with Tisha's method!
>
>Bob - N0DGN
>
>On 9/21/2010 11:49 AM, Bernie Doran wrote:
>>
>>> "Has anybody tried a balun of the proper ratio to couple 
>the coax to the
>>> balanced input?"
>>>
>>> Yes, I have, that is the way to go. I hand wound a 2.5:1 
>un-bal, put it in
>>> a
>>> metal box with a coax connector on one end and a twinax 
>pigtail on the
>>> other. It works just great.
>>>
>>> If I recall correctly, using the C connector there is a 
>mini coax flipover
>>> you need to do at the RF deck to get the best sensitivity.
>>>
>>>
>>> -- 
>>> Ms. Tisha Hayes/ AA4HA
>