Topband: Antenna switch rating for high SWR?

[Paul Christensen]

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 at arrl.net>
To: <john at ae5x.com>
Cc: <topband at 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 at 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
>>
>>
>>
>> _________________
>> Topband Reflector
>>
> _________________
> Topband Reflector