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Re: [Amps] Relays

To: <k3lr@k3lr.com>, "'Amps'" <Amps@contesting.com>
Subject: Re: [Amps] Relays
From: "David Cutter" <d.cutter@ntlworld.com>
Date: Sun, 30 Mar 2008 19:50:14 +0100
List-post: <amps@contesting.com">mailto:amps@contesting.com>
Sorry to labour the point, but, how do you guarantee that?  Is it a question 
of operator training?

David
G3UNA

> Yes, we use foot switches on SSB. This has not been a problem for hot
> switching for us. There is a small delay from when PTT is actuated in the
> radio and when RF production starts, so we are all OK.
>
> 73,
> Tim K3LR
> http://www.k3lr.com
>
>
> -----Original Message-----
> From: amps-bounces@contesting.com [mailto:amps-bounces@contesting.com] On
> Behalf Of David Cutter
> Sent: Sunday, March 30, 2008 1:28 PM
> To: 'Amps'
> Subject: Re: [Amps] Relays
>
> Tim
>
> Do you ever use foot-operated PTT ?  I am always a little suspicious that
> the brain gets the voice to start before the foot gets the switch to the
> floor.  When ms count, the 11ms from brain to foot and then foot to floor
> could be a problem for hot switching.
>
> David
> G3UNA
>
>
>
>>I have been using single Kilovac HC-1 and Jennings RJ1A relays for input
>>and
>> output T/R switching on all of my single 8877 amplifiers for the past 25
>> years.
>>
>> Even in heavy contest operating, I have had no problems at 1500 watts
>> output
>> up through 50 MHz.
>>
>> 73!
>> Tim K3LR
>> http://www.k3lr.com
>> >  W4HBM
>>
>
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> 

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