[TenTec] Titan 425

Thu, 9 May 2002 13:57:01 -0400

If I'm correct, for full break in keying, you key the amp and let the amp
key the ptt line on the rig.

Cosmic Celt   -   "You can take my life, but you can't have my freedom."
----- Original Message -----
From: "Joe L Blackwell" <[email protected]>
To: <[email protected]>
Cc: <[email protected]>
Sent: Thursday, May 09, 2002 1:36 PM
Subject: Re: [TenTec] Titan 425

> I can't find any voltage/current specs in the Titan 425 manual.  I key
> the 425 using positive keying from the Heathkit HD-1410 which keying
> circuit is a darlington pair of MPSA42s.  Heathkit says this circuit will
> key no more than ~10ma since it is a constant current sink.  I also key
> the 425 with a keyboard circuit from QST June 1992.  Can't find this
> circuit right away.  Not much help, but good luck on your keying circuit.
> 73,
> Joe, aa4nn
>
> On Wed, 08 May 2002 18:30:01 -0500 Matt Erickson <[email protected]> writes:
> > Hi Ten-Teccers,
> > I just came on board of this reflector as I am soon to have a Titan 425
> in my shack.  In preparation of the > new amp, I would like to know what
> the keying voltage & currents are?
> > I plan to build a keying interface to run the amp with my PRO II.
> > I need a little info on the unit before I start building it.
> >
> > 73 de Matt KK5DR
> >
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