Test KPA100 with one power supply???

[Steve Kallal]

I was wondering it possible to test the KPA100 option with one power supply,
but with two separate power cables. I have a distribution box with Anderson
Power Poles. So two power cables is easily possible. My power supply can
handle 25 amps.
 
I guess I could use two separate power supplies if absolutely necessary.
 
73,

Steve N6VL
 
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[waltk8cv4612amos]

Everyone's setups are different but .............

I feed the K-2 with KPA-100 and KAT-100 with two supplies for my own
reasons. A ten amp switching supply powers all my qrp stuff. No fancy
Anderson power poles stuff for me. Just a Altoids tin with 8 RCA jack thing
I go from All Electronics. All the plusses and minuses in the Altoids tin
are tied together and one jack is used as DC in and 7 are used as DC out,
works for me. So, from there I feed to the K-2 2.1 input jack and another
lead to the KAT-100 2.1 input jack. Now you could make up a special cable
with one RCA on one end for the Altoids box and solder it with genuine lead
solder into a Y with two 2.1 barrel plugs for the tuner and K-2 but I didn't
do that :-) ! I have another WHOPPING RS-35M Astron supply and feed from a
plain old 12 screw barrier strip to the KPA-100 and that way for operating
QRP I just turn off the RS-35M and soon the K-2 display says " no KPA power
supply " or something like that and it reverts to a qrp radio. The K-2 and
tuner keep right on operating :-)

Works for me ..............

Walt K8CV Royal Oak, MI.
----- Original Message -----
From: "Steve Kallal" <[hidden email]>
To: <[hidden email]>
Sent: Tuesday, August 07, 2007 2:04 AM
Subject: [Elecraft] Test KPA100 with one power supply???

>I was wondering it possible to test the KPA100 option with one power
>supply,
> but with two separate power cables. I have a distribution box with
> Anderson
> Power Poles. So two power cables is easily possible. My power supply can
> handle 25 amps.
>
> I guess I could use two separate power supplies if absolutely necessary.
>
> 73,
>
> Steve N6VL
>
> _______________________________________________
> Elecraft mailing list
> Post to: [hidden email]
> You must be a subscriber to post to the list.
> Subscriber Info (Addr. Change, sub, unsub etc.):
> http://mailman.qth.net/mailman/listinfo/elecraft
>
> Help: http://mailman.qth.net/subscribers.htm
> Elecraft web page: http://www.elecraft.com 

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[Don Wilhelm-3]

Steve,

Yes, you may test it with 2 cables from the same power supply.
When the manual says 'Turn off the low/high current power supply', just
unplug the cable instead.

The tests are to assure that the the K2 senses the power supply shutdown
and that proper messages are displayed with the various combinations, it
is not a test of the power supply itself.

There is no advantage to connect both the low and high current cables to
the power supply for normal operation - because if the power supply goes
off, there is no power anywhere.  The auto switching will only take
place if two separate power supplies are used - preferrably with the low
current supply coming from a battery backed-up source - that will keep
you on the air even if a power failure has occurred.

73,
Don W3FPR

Steve Kallal wrote:
> I was wondering it possible to test the KPA100 option with one power supply,
> but with two separate power cables. I have a distribution box with Anderson
> Power Poles. So two power cables is easily possible. My power supply can
> handle 25 amps.
>  
> I guess I could use two separate power supplies if absolutely necessary.
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