[Johnson] T/R relay

[Bry Carling]

Jimmy you would only really need a vacuum relay if you plan to operate QSK CW.


Glen Zook <gzook at yahoo.com> wrote:

>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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