Ive tried those and other compact relays to switch antennas in 2-4 high
stacks on the tower. All soon fried at 1200W. I went with surplus (All
Electronics) DPDT P&B 13A contacts, 24VDC coil relays with plastic covers.
On 10/15M I used small value caps to cancel the XL. The only thing that took
those out was a lightning strike that demagnetized the coils on a
few....they still worked fine on AC but I replaced them all anyway.
Carl
KM1H
----- Original Message -----
From: "Dave Hachadorian" <k6ll@arrl.net>
To: <amps@contesting.com>
Sent: Tuesday, August 03, 2010 4:54 PM
Subject: Re: [Amps] Automotive Relays
> Below is some info from W2VJN on inexpensive relays for RF. They
> are available for $2.43 each here:
> http://parts.digikey.com/1/parts/747811-relay-pwr-spdt-10a-12vdc-pc-mnt-jw1fsn-dc12v.html
>
> Dave Hachadorian, K6LL
> Big Bear Lake, CA
>
>
>> The relays which we use in the Top Ten Devices boxes are 10
>> amp,
>> sealed power relays. They are very small and have very low
>> inductance. The contacts are connected to the base pins with
>> wide conductors. I have run many power tests on these relays
>> and the pc boards they are mounted on with temperature monitors
>> and they will take full amateur power (+) to over 30 MHz. We
>> rate our boxes conservatively at 1.5 KW. The part number is
>> JW1FSN-DC12V. They come with several different brand names on
>> them. Similar relays are being used by other manufactures of
>> amateur boxes and they rate them variously at 3 KW and 5 KW.
>>
>> George, W2VJN
>
>
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