[R-390] R390 Back Panel Outputs Corrected Copy

[John KA1XC]

Hey Don, here's my 2 cent guesses:

PAN OUT  = Panadapter Output, meaning it is a pick off for an input to a
panadapter or spectrum analyzer, probably from a variable IF or fixed 455 KC
IF.

X UA IN  = eXternal or auXilary Unbalanced Input, meaning that it is used as
an RF input to the receiver, probably at a high impedance point. Be careful
with this one, if it is directly connected to the calibrator input to the RF
deck then it will be HOT with B+ (one of the quirks of the R-390).

73,
John



> Hello to the group
>
> I have just received another R390 to restore for my collection (like we
need
> more). On the back panel just above the pin straighteners and near the
tool
> holders are two added female BNC connectors which were professionally
added.
> Penciled near one is "PAN OUT" and the second has X UA IN with grease
> pencil.
> This radio reportedly came from an AFB in TX and was used in a "special"
> area according to the seller. I have an idea about PAN OUT, but could
> someone explain what the X UA IN note could mean. The cables are connected
> as follows:
>
> PAN OUT goes to the RF deck thru RG-58 to an SMA connection near the back
> left green screw.
> X UA IN goes thru a small cap to a BNC TEE with the Calibrator output.
>
> Thanks,
>
> Don Heywood
> WC4G, Charleston, SC
>
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