[RTTY] MFJ Antenna Switches

[John Elsik]

Of course there is some "heat" from the relay coil.
It depends on "what" is getting warm.
The MFJ switches are clearly not rated for 1500W Rtty.
The published specs speak for themselves(2kw pep/1kw cw).
Ameritron switches are rated higher, spec wise, and are still reasonably
priced.
It also depends on what the antenna SWR is.

-----Original Message-----
From: rtty-bounces at contesting.com [mailto:rtty-bounces at contesting.com] On
Behalf Of Ian White GM3SEK
Sent: Sunday, March 16, 2008 9:13 AM
To: rtty at contesting.com
Subject: Re: [RTTY] MFJ Antenna Switches

John Elsik wrote:
>-----Original Message-----
>>From: rtty-bounces at contesting.com [mailto:rtty-bounces at contesting.com] 
>>On
>>Behalf Of W7RY
>>Sent: Sunday, March 16, 2008 8:11 AM
>>To: GARY ELLIOT; rtty at contesting.com
>>Subject: Re: [RTTY] MFJ Antenna Switches
>>
>>We used several of them at WA7EGA. They would get a little warm but 
>>they never failed.
>
>Heat = loss
>Heat = underrated for the power/class of service
>

All coax switches get warm, for no more reason than "heat = current 
through relay coils".


-- 

73 from Ian GM3SEK
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