Ditto on that series Tyco relays. I used them about 15 years ago when
switching line lengths on the W5DXP "No Tuner All Band Antenna." That
antenna requires five relays to stretch open-feeder line lengths. They
performed well outside although they were protected from rain with simple
plastic covers.
Paul, W9AC
----- Original Message -----
From: "Hank Garretson" <w6sx@arrl.net>
To: <john@ae5x.com>
Cc: <topband@contesting.com>
Sent: Sunday, October 20, 2013 12:37 PM
Subject: Re: Topband: Antenna switch rating for high SWR?
For years, I used Tyco DPDT relays. Open-wire feed, who knows what SWR,
full 1.5 kW.
For example:
http://www.mouser.com/ProductDetail/TE-Connectivity-PB/PRD-11DH0-110/?qs=sGAEpiMZZMtGt%252bn33CgIPz07uLBulijhRYGqdd4PmSw%3d
Mine were 12 VDC units, and with a little research you can probably find
them.
73,
Hank, W6SX
On Sun, Oct 20, 2013 at 9:04 AM, John Harper <john@ae5x.com> wrote:
Morning all,
I am planning to put in a DPDT switch (or relay) to allow me to easily
switch from using my 80m dipole as a vertical (T-top) antenna on 160m:
http://www.ae5x.com/docs/antennas/160mT.jpg
The dipole is fed with 450-ohm ladder line and used 10-80m in that
configuration so there is a high SWR on the line. I sometimes use a kw
output.
I know that T/R switches inside amps are fairly small in physical size,
however they are designed to operate into a fairly low SWR load. I have
no
idea of what rating of a DPDT switch I would need (per the diagram) in my
application - perhaps I'm making a bigger deal of something that isn't so
critical.?
John AE5X
http://www.ae5x.com/blog
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