Topband: Found it! Reversible Beverage Switch

[Herbert Schoenbohm]

I have working with 3 reversible Beverages and bring 6 runs of RG-6 into the shack. Two of these antennas use DX-Engineering boxes and they recommend they recommend the application of a 75 ohm termination to the unused port for proper operation of these antennas.  This is not an easy thing to do without relays or switches so I began searching for a switch panel that would allow me to do this switching from the shack in the simplest way possible. The standard coax switches even the ones with great isolation do not do the trick.

Then I found it or them....... a bunch of Dynair VS-6A and even a VS-10A which are passive video switches that provided a 75 ohm termination to every unused port.  These units have SO-239 input and output and with adapters I easily converted them to BNC.  The used port is illuminated (by internal light bulbs powered by a self contained power supply.  The port isolation is measure at <70 db on 1.8 Mhz.  Now if I use RG-6 at multiples of a halfwave, factoring in the VF, I understand the termination will be replicated at the reversible Beverage unused port at the feed point.  The pushbutton switches take a minimum of pressure and are relatively quiet.

I have a total or 3 extra which I will not use...so send me an e mail before I put them on eBay if you want one. I have a .jpg picture of one I can send to you. I will probably keep the 10 input one but if they are something that will solve switching problems for you let me know.  The only drawback is that they have ears for standard rack mounting but that may be a plus for you depending on how your desktop is configured.

73 & DX

Herb Schoenbohm, KV4FZ