Nice simple circuit Lee.
It certainly works for SSB and CW with a QSK amp, but I would think the slow
relays in the old 30L1 and in the AL811 would not be able to follow CW
keying.
Are you using this in CW too?
It is just as simple to add a second transistor stage and add a "hang delay"
control - i.e., key the +12 to the relay instead of the ground, and then
shunt a variable resistor and capacitor across the +12v side of the relay's
coil. This gives you adjustable delay, just as it is done within the model
318 amp keyer AND long ago in the Model 405 amplifier.
73
Rick, DJ0IP
-----Original Message-----
From: TenTec [mailto:tentec-bounces@contesting.com] On Behalf Of Bryan Lee
Cornwell
Sent: Tuesday, August 06, 2013 11:15 AM
To: tentec@contesting.com
Subject: Re: [TenTec] Argo V amp keying
http://k2blc.com/argoampmod1.jpg
Here is how I keyed my Argonaut V....worked fine for 30L1 and AL811
73
Lee
On 8/6/2013 1:51 AM, Rick - DJ0IP / NJ0IP wrote:
> Of course it does.
> It has a "T" line inside which goes positive whenever the ARG.V goes
> into transmit.
> This enables all the other stages needed to transmit.
> It can also be used as a signal to key the external linear.
>
> All you need do is tap into that signal, buffer it with a transistor
> and drive a small reed relay. The reed relay's NO contacts can be
> used to key the external amplifier.
>
> Of course you will probably need to drill a hole in the back panel for
> mounting an RCA phono jack, and you'll need to solder a few
> connections, but it's quite easy.
>
> 73
> Rick, DJ0IP
>
> -----Original Message-----
> From: TenTec [mailto:tentec-bounces@contesting.com] On Behalf Of Mark
> N8COO
> Sent: Tuesday, August 06, 2013 3:52 AM
> To: tentec@contesting.com
> Subject: Re: [TenTec] Argo V amp keying
>
> The Argonaut V does not have any provision for keying an external amp.
>
> 73, Mark N8COO
>
>
>
> Date: Sun, 04 Aug 2013 14:41:33 -0400
>> From: Dave Edwards <kd2e@comcast.net>
>> To: Discussion of Ten-Tec Equipment <tentec@contesting.com>
>> Subject: [TenTec] Argo V amp keying
>> Message-ID: <51FEA05D.7000901@comcast.net>
>> Content-Type: text/plain; charset=ISO-8859-1; format=flowed
>>
>> I would like to try keying an amp with my Argo V.
>>
>> The ACC din plug has a connector labelled "PTT"
>> The manual indicates this is for remote keying the radio with a TU or
>> whatever.
>>
>> Does anyone know if it also provides a closure upon transmit?
>>
>> ....Dave
>>
>>
>>
>>
>> --
>>
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>
--
Bryan Lee Cornwell
blcornwell@k2blc.com
http://k2blc.com
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