The Model 405 Amp uses carrier operated relay for switching its T/R relay.
As such, RF hits the box before the relay has keyed.
There is a simple mod to prevent this.
Modify the amp to enable it to be keyed by any open collector circuit.
Then it can be keyed safely by the AMP KEY signal from pin 8 of the Argo's
accessory socket.
I have posted the information to do this in the Argonaut 6 Yahoo!Group files
section.
I couldn't find any way to post it here in the contesting.com TT group.
If anyone needs it, send me an email directly, to
Rick at DJ0IP dot DE
73 - Rick, DJ0IP
(Nr. Frankfurt, Germany)
-----Original Message-----
From: TenTec [mailto:tentec-bounces@contesting.com] On Behalf Of John Farler
Sent: Thursday, February 11, 2016 10:40 PM
To: tentec@contesting.com
Subject: [TenTec] Question....way out there.....
I've become an owner of the TT Argo VI, as a gift from the local radio club
for somethings I did during my ham lifetime.
The situation is: I want to use it at times with the old, old
50 watt amplifier that TT made to go with the Argo 509.
Don't need any coaching about over drive or anything like that.
But as I recall the amp is put inline by rf detection. I'm not certain that
this is a good idea, even with such low power that it would take to drive
it. Hot switching.
These old amps are kind of rare, and just wondering if anyone on the list
has thoughts on this combination.
No, I don't want to buy a new amp! No, I haven't looked at the manual yet!
Will, soon. ;>)
Thanks,
73,
John, K4AVX
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