[Elecraft] K2 KAT100-1 question

[Eddy]

As always Don, thanks for the advice........I should have looked at the circuit myself......73

Eddy




________________________________
 From: Don Wilhelm <w3fpr at embarqmail.com>
To: Eddy <k6sdw at yahoo.com> 
Cc: "elecraft at mailman.qth.net" <elecraft at mailman.qth.net> 
Sent: Friday, July 19, 2013 9:49 AM
Subject: Re: [Elecraft] K2 KAT100-1 question
 

Eddy,

Run the wire - that connector on the K2 is an input only.   There is a 
series reverse voltage protection diode in the K2 that will prevent 
current from flowing *out* of that connector.

One use for that connector is to use two power sources with the K2. A 
high current power supply connected to the KPA100, and a battery-backed 
smaller supply (like a Smartcharger connected to the battery) connected 
to the base K2 coaxial jack and also to the KAT100.
Should AC power fail, the battery will take over and your operation can 
continue although at a lower power.  The changeover is automatic - if 
power drops on the KPA100, the base K2 will still operate.

73,
Don W3FPR

On 7/19/2013 12:16 PM, Eddy wrote:
> Finished the KAT100-1 tuner and I'm seriously impressed with this unit!!
>
>
> Question, my K2 has installed the KPA100 amp in the K2, I noticed I have 12vdc connector at the rear of the K2, can I use this 12vdc source to power the KAT100-1 instead of running a separate lower lead to my 12v supply? The specs say the KAT100-1 pulls a max of 700 ma so it should be ok?
>
>