[Boatanchors] RF Power handling of Relays

[Carl]

They sound like the same relays that have been in KW amps for decades and 
work just fine at HF.

I even use them in weathertight boxes to switch antennas on the tower, never 
lost one at 1200W in 20+ years. Mine are 24VDC coils to minimize voltage 
drop on long runs.

DowKeys are overated and too noisy.

Carl
KM1H




----- Original Message ----- 
From: "John King" <k5pgw at yahoo.com>
To: <boatanchors at mailman.qth.net>
Sent: Saturday, May 30, 2009 2:34 PM
Subject: [Boatanchors] RF Power handling of Relays


>
> I have decided to construct some antenna switching relays for my numerous 
> Vintage Am stations and have built some using relays with 10 AMP contact 
> ratings at as much as 125 to 250 volts similar to the plug in Potter 
> Brumfield units operating with a coil voltage of 12 vdc.
>
> Assuming a reasonably low SWR on the feedline, what is your opinion based 
> on experience with relays that these 10 AMP contacts will handle. I am 
> really tired of over 50 years of grabbing the 115 volt terminals on Dow 
> Key relays when attaching cables and removing them. Dow Keys are great 
> relays and I have some, but not enough to make up the stations I need to 
> assemble.
>
> Feel free to email me directly. Thanks and 73, John, K5PGW
>
>
>
>
>
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