[TenTec] 9420 Power Supply Question

[NJ0IP]

It looks to me like the only way to turn the 9420's 4 separate power
supplies on it to apply +13v to pin 3 of the 12-pin plug.

But that doesn't make much sense because then the Herc would always have to
be on before you could turn the Omni VI on.  Ten-Tec usually does logical
stuff so there must be some trick in how the 4-pin is wired.  Unfortunately
there's no description and the drawings are vague (showing only 1 line
between the 4-pin plug and the P.S.).

73
Rick

-----Original Message-----
From: tentec-bounces at contesting.com [mailto:tentec-bounces at contesting.com]
On Behalf Of Ken Brown
Sent: Saturday, January 15, 2005 1:12 PM
To: tentec at contesting.com
Subject: Re: [TenTec] 9420 Power Supply Question


>  The transceiver "power on" is activated by connecting a load to this 
> "power on" lead. The text does not say what they mean by a load, and 
> it does not say just to ground it. I'll look at my Omni VI manual and 
> see what it connects to pin 3.

I am not getting this. I does not help that my Omni VI manual does not 
have pin numbers on the DC Power Input Board schematic. I don't see how 
the power switch on the Omni VI can turn the 9420 on and off. It looks 
like just plugging in Omni VI into the 9420 would turn it on, regardless 
of the power switch postion. I have never tried using the 9420 to power 
the Omni. Never made up a cable to do it. Still I would like to 
understand this circuit, in case I ever want to use it that way. Anybody 
out there who can clarify this?

DE N6KB


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