> Don´t forget the German HOSCHA switch.
> I have a Hoscha 2000 switch that measures:
> 30 MHz 42 dB return loss, isolation 54 dB
> 145 MHz 35 dB return loss, isolation 41 dB
> 435 MHz 35 dB return loss, isolation 35 dB
> Insertion loss 0.03 dB or better.
> Will handle very high power and the cost is
> around 200 dollars.
> Does dow-key/Transco really have remote
> rotary switches with that huge isolation.
>
[Steve Katz] Yes, they do. The Transco M series have 100 dB
isolation; I've actually measured it to be better than that, up through 432
MHz. It falls to about 100 dB at 1.2 GHz. It's a true coaxial switch that
just happens to be weatherproof and include a motor drive, but otherwise
it's similar to a Bird Electronic coaxial switch. -WB2WIK/6
> The only Transco relay I know of with that
> high isolation is their SPDT koax relay, well
> it´s sort á SPDT really.
>
> 73 Jim SM2EKM
>
> PS: Hoscha 2000 is 5 position remote motor driven switch.
> -------------------------------------------------------------
>
> Steve Katz wrote:
>
> >The only remote antenna switches I know of that actually "work" at UHF
> are
> >the Dow-Key/Transco types, which I've used with great success for many
> >years. The "M" series products have 0.05dB attenuation and 100dB
> isolation
> >at 100 MHz, but are rated to operate through 12.4GHz, and are available
> in
> >SP3T through SP6T models, all Type N connectors, all completely
> >weatherproof, with various actuator voltage ratings from 28Vdc through
> >120Vac. They easily handle 1500W PEP, and are constant impedance through
> at
> >least 3GHz. Although I buy mine surplus, they are still manufactured
> and
> >readily available, pretty much "off the shelf" from Dow-Key, locally to
> me
> >in Ventura, CA. http://www.dowkey.com
> >
> >73 de Steve, WB2WIK/6
> >
> >
> >>At 10:21 8/9/2002 -0400, Mel Martin wrote:
> >>
> >>>Does anyone know of a remote antenna switch that works at VHF/UHF?
> >>>
> >>The Ameritron RCS-8V is rated :
> >>
> >>VSWR is less than 1.2 from DC to 250 MHz and less than 0.1 dB loss at
> 150
> >>MHz - It handles 5 KW below 30 MHz and 1 KW at 150 MHz. The manual
> also
> >>states "only a slight compromise in VSWR occurs at 450mhz.
> >>
> >>The switch is also available as the RCS-8VN with N connectors.
> >>
> >>73 Phil NA4M
> >>
> >>
> >>-. .- ....- -- -. .- ....- -- -. .- ....- -- -. .- ....- -- -.
> .-
> >>....- --
> >>Phil Duff NA4M na4m@arrl.net Georgetown, Texas
> >>
> >>
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