[TenTec] Argo V amp keying

[Rick - DJ0IP / NJ0IP]

Dave,

That is definitely NOT on the accessory connector.
The "T" line has NEVER been brought to the real panel for tapping into - not
on any transceiver.

The AUX Jack (accessory connector) was wired as follows:
 
Pin-1:  Line Out
Pin-2:  Line IN
Pin-3:  Shield (Common Ground)
Pin-4:  Spare (not used)
Pin-5:  PTT

Pin-5 is used to key the ArgoV into TX mode from an external device.
It is NOT the "T" line.

You really have to dig inside the box, find and tap into the T line and use
one (preferably two) transistors to key a small reed relay.  The reed relay
can then be used to key the Linear Amp.

The components to do this will cost you about $3, including the relay.
Actually due to inflation (the price of stuff at Rat Shack these days), it's
probably more like $5.

73
Rick, DJ0IP


-----Original Message-----
From: TenTec [mailto:tentec-bounces at contesting.com] On Behalf Of Dave
Edwards
Sent: Tuesday, August 06, 2013 2:07 PM
To: tentec at contesting.com
Subject: Re: [TenTec] Argo V amp keying

Is that not the line already available on the accessory connector? (for
keying the radio)

...Dave


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 at contesting.com] On Behalf Of Mark 
> N8COO
> Sent: Tuesday, August 06, 2013 3:52 AM
> To: tentec at 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 at comcast.net>
>> To: Discussion of Ten-Tec Equipment <tentec at contesting.com>
>> Subject: [TenTec] Argo V amp keying
>> Message-ID: <51FEA05D.7000901 at 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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