[Elecraft] K2/100 used with Collins 30L-1?

Fri Jan 17 00:15:01 2003

The 30L1 (and the Heathkit sb-200) use the relay line to set the operating
bias on the tubes. If you have much voltage drop on the PTT line it can
change the bias on the tubes when keyed.

The voltage on the PTT line of the 30L1 and the SB-200 is NEGATIVE. You will
need to make sure the circuit you are using will switch negative voltage to
ground.

Good luck!
73
Jim W7RY

----- Original Message -----
From: "Eric Swartz WA6HHQ - Elecraft" <[email protected]>
To: "peter barville" <[email protected]>
Cc: <[email protected]>
Sent: Thursday, January 16, 2003 1:56 PM
Subject: Re: [Elecraft] K2/100 used with Collins 30L-1?

> As long as it is a positive DC switching voltage ethe KPA100 should be OK.
>
> 73, Eric   WA6HHQ
> ======
>
>
> peter barville wrote:
> > Just wondered if anybody has experience of using the K2/100 in
> > conjunction with a Collins 30L-1.
> >
> > I'm hoping the KPA100 switching line (rated at 200v) will cope happily
> > with the antenna change-over relay of the Collins, which I think sits at
> > about 120v (but I'm not sure of its current rating).
> >
> > A true mix of the modern, with the not so modern!
>
>
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