[R-390] r-390A ballanced/unbal mod. ?

[Dave Sampson]

hello

first ...thanks for all your input on painting and line voltage dropping.


there is an r-390/A field change which re-routes internal coax connections so that the unballanced connector will make use of all of the rf stages and a mod for the ballanced connector that uses an impedance matching balun and a twinax to single conductor connector. 
so....if you swap the internal coax connections to bring all the rf stages to the unbalanced connector, (is there stil an impedance missmatch which requires a ballun?)

thanks
73s
dave