Remote Antenna Relay Question

[WA2OLZ]

I have a remote antenna switch made by Inline Instruments. The relay is model 103 and I also have the coupler that goes with it. I can't find any documentation online for it. I believe applying "X" volts to the coupler switches the relay from antenna A to antenna B. The question is - what is the required voltage to make the switch?

EDIT: I'm almost certain this is the same product that at one time was sold by and branded as Unadilla.

Tnx & 73
Jack
WA2OLZ
JVM@D8ALUS.NET

[WA2OLZ]

No responses but I got it figured out. For anyone else that may find this thread someday via a search -- the answer is 12VDC. The three port model uses +12VDC, 0, -12VDC to select he three ports.