[Amps] Drake L4 Slow Relay

[Carl]

Copy the amp keying circuit from Amp Supply products using a vacuum relay in 
the output. It will follow 50 wpm keying at 2KW+ out. It was a standard 
feature in the LK-500ZC, 550ZC and all the 800's.

Carl
KM1H


----- Original Message ----- 
From: "Paul Christensen" <w9ac at arrl.net>
To: <amps at contesting.com>
Sent: Saturday, November 21, 2009 6:58 PM
Subject: Re: [Amps] Drake L4 Slow Relay


> He's discussing the time from Tx back to Rx -- not a missing transmitted
> "dit."
>
> Again Mike, to overcome that problem requires setting Semi-Break-In on the
> transceiver to a faster value.   However, really fast replies will require
> QSK activation of the transceiver and a QSK mod made to the L-4 amp -- or
> use of an external QSK device like the Ameritron QSK-5 or the QSK-Master
> from Array Solutions.
>
> Paul, W9AC
>
> ----- Original Message ----- 
> From: "mike stokes" <mike9v at gmail.com>
> To: <ve3zi at rac.ca>
> Cc: "Amps" <amps at contesting.com>
> Sent: Saturday, November 21, 2009 6:27 PM
> Subject: Re: [Amps] Drake L4 Slow Relay
>
>
>> Sorry, let me be more clear.  The relay takes 2 long to reingage after I
>> quit sending, therefore I miss the first letter from someone is quick to
>> respond.  It happened quite a few tms so I assume they just didn't call 
>> to
>> quick.
>>
>> Thanks in advance.
>>
>> Mike
>> KK9V
>>
>> On Sat, Nov 21, 2009 at 4:34 PM, Roger Parsons <ve3zi at yahoo.com> wrote:
>>
>>> K1KP wrote:
>>>
>>> ...Quite often the cause of the 'missing first dit' is that the exciter
>>> is
>>> making RF before the amp has switched over to transmit. The exciter sees
>>> a
>>> high SWR, and on rigs such as the 765, folds back the output...
>>> ...a solid sate version of the PTT signal available on an output
>>> connector
>>> known as 'SEND'...
>>>
>>> Tony is quite correct.
>>>
>>> However, beware! The solid state PTT signal on the IC765 operates about
>>> 8ms
>>> before RF appears which is fine. Unfortunately, if the rig is used in
>>> full
>>> break-in mode, it de-operates (?!) about 8ms BEFORE RF disappears - 
>>> which
>>> is
>>> disastrous!
>>>
>>> 73 Roger
>>> VE3ZI
>>>
>>>
>>>
>>>
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