[Towertalk] Re: remote antenna switch

[Joe Reisert]

Hi Jim,

Transco also makes a single pole high isolation 4 position switch with 
construction similar to the Transco "Y" relay. It is sometimes referred to 
as a Porcupine (after the animal). It looks like a large golf ball with 
many connectors and solenoids protruding in all directions. It has 
performance similar to the "Y" type relays. I have used them on my VHF/UHF 
tower to switch between antennas up through 2300 MHz. However, you must 
make your own switching box.

73,

Joe, W1JR

At 09:49 AM 8/10/2002 +0200, Jan Erik Holm wrote:
>Donīt 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.
>The only Transco relay I know of with that
>high isolation is their SPDT koax relay, well
>itīs 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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>
>
>_______________________________________________
>Self Supporting Towers, Wireless Weather Stations, see web site: 
>http://www.mscomputer.com
>Call 888-333-9041 to place your order, mention you saw this ad and take an 
>additional 5 percent off
>any weather station price.
>_______________________________________________
>Towertalk mailing list
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