Towertalk
[Top] [All Lists]

RE: [TowerTalk] Help need Vacuum Relay Isolation 1.8 to 30

To: towertalk@contesting.com
Subject: RE: [TowerTalk] Help need Vacuum Relay Isolation 1.8 to 30
From: "OM7ZZ, Jozef Urban" <om7zz@stonline.sk>
Date: Wed, 05 Jan 2005 23:38:58 +0100
List-post: <mailto:towertalk@contesting.com>
We're builded 10 ANT / 2 Radio switch with Gigavac G2SP relays. On each ANT 
port are three of them used.
Achieved -60dB isolations on adjacent ANT ports and more than -70dB on non 
adjacent ports.
When both radios would like to select the same antenna, isolation is still 
around -68dB. 
All mentioned isolations was measured at 28MHz.

Some fotos and measurements are here:
www.microham.com/Custom/DT/doubleten1.jpg
www.microham.com/Custom/DT/doubleten2.jpg
Insertion loss
www.microham.com/Custom/DT/insertion.jpg
SWR
www.microham.com/Custom/DT/swr.jpg
Isolations same ANT port
www.microham.com/Custom/DT/isolation1.jpg
Isolations adjacent ANT ports
www.microham.com/Custom/DT/isolation2.jpg
Isolations non-adjacent ANT ports
www.microham.com/Custom/DT/isolation3.jpg

73 Jozef OM7ZZ

-=x=-
Skontrolované antivírovým programom NOD32

_______________________________________________

See: http://www.mscomputer.com  for "Self Supporting Towers", "Wireless Weather 
Stations", and lot's more.  Call Toll Free, 1-800-333-9041 with any questions 
and ask for Sherman, W2FLA.

_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk

<Prev in Thread] Current Thread [Next in Thread>