[TenTec] Titan 425

Thu, 9 May 2002 11:28:43 -0700

Matt:
Per the Titan 425 schematic, the keyer has to sink less than 3 ma
(28vdc through a 10k resistor).  I wouldn't think a 'keying
interface' is required, after all a Titan isn't a SB-220 with
120vdc on the key line.

Check your Pro II and Titan instruction manuals, but I believe
you will find that your key/keyer will go to the Titan TXen with
the Titan TXout to the rig's KEY/KEYER  input.  You'll be keying
the amp and the amp's protection circuitry will key the rig.

73 de Greg, K7KJ

----- Original Message -----
From: "Matt Erickson" <[email protected]>
To: <[email protected]>
Sent: Wednesday, 08 May, 2002 16:30
Subject: [TenTec] Titan 425

> 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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