[Johnson] T/R relay
Glen Zook
gzook at yahoo.com
Wed Jul 10 15:59:53 EDT 2013
On HF, a generic open frame relay with at least 5-amp contacts, can take full legal power (and then some).
Look inside of many linear amplifiers and one will see relatively small open frame relays used for antenna switching.
Glen, K9STH
Website: http://k9sth.com
________________________________
From: Bill Cromwell <wrcromwell at gmail.com>
To: johnson at mailman.qth.net
Sent: Wednesday, July 10, 2013 12:26 PM
Subject: Re: [Johnson] T/R relay
On 07/09/2013 01:24 PM, Jimmy Green wrote:
> I am setting up my 75A4 and Johnson Desk KW. Please someone tell me should I use a Dowkey or a Vacum relay.If vacum, tell me how to size and how to connect. I know nothing about the vacum relay.
> Thank you in advance.
> Jimmy K5CSU
>
Hi,
I'm waiting to hear about that, too. I have not needed a vacuum relay
because I have never used more than about 100 watts. So what power level
is beyond open frame relays?
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