[R-390] UnBal for R-390A

[rbethman]

Tisha,

Stick with your un-bal methodology.  This uses the best of the input 
circuitry.  There is ONE other aspect to consider.  When performing an 
alignment with a sig gen, the sig gen's impedance is what you will have 
peaked the input for.  So it "may" turn out that the 120 ohm figure is 
not the best.  Use the balanced input, but make your un-bal to match the 
sig gen's impedance.

My $0.02 worth, and worth every bit of it!

Bob - N0DGN

Tisha Hayes wrote:
> Has anyone made a un-bal for the balanced antenna connection on the 
> R-390A to bring it down to a 50 ohm unbalanced connection?
>
> I have a hand-wound 2.5:1 balun with overlapped windings with Litz 
> wire on a FT-75 core (125 ohm to 50 ohm). What I would like to know is 
> if I should make another one of these things for my other receiver or 
> I should go the easy route and use a single wire into the unbalanced 
> connector or just use the C connector for my antenna.
>
> My guidebook has been;
> www.dxing.info/equipment/*impedance*_*transformer*_bryant2.doc 
> <http://www.dxing.info/equipment/impedance_transformer_bryant2.doc>
>
> It seems that most folks get great results with the easy route. What 
> have been your experiences?
>
> Any suggestions?
> ------------------------------------------------------------------------
>
> _____________________________________________________________
> R-390 mailing list
> Home: http://mailman.qth.net/mailman/listinfo/r-390
> Help: http://mailman.qth.net/faq.htm
> Post: mailto:R-390 at mailman.qth.net
> Unsubscribe: http://mailman.qth.net/mailman/options/r-390

-- 
Bob - NØDGN