[Elecraft] KPA3 for QRP

[Ralph Tyrrell]

post from the past  ref K3 current draw.
--------------------
Fri, 22 Feb 2008 21:53:25 -0600
From:	"Kenneth A. Christiansen" <w0cz at i29.net>  Add
Mobile Alert 
To:	elecraft at mailman.qth.net
Subject:	[Elecraft] K3 NR 457 now working in Fargo ND


I got a pleasant surprise yesterday when K3 457
arrived. It was ordered
 
June 13 and I got my Lisa Gram last week end.
It has KAT3, KBPF3, KXV3, 500 hz filter, 2700 hz
filter, 6000 hz filter
 
and the FM filter on back order.

I made a special test on it because I wanted to know
how the KPA3 
changes the current draw.  I know others have asked
the same question here and never did get an answer so
here it is. .

The current tests before I put in the KPA3.
Receive 0.94 to 1.1 A
TX (NO POWER) 1.56 A
TX 5W 2.56 A
TX 10W 3.07 A
TX 12W 3.23 A

The same test after the KPA3 was installed, Set up and
working fine.
Receive 0.94 to 1.1 A
TX (NO POWER 2.16 A
TX 5W 3.10 A
TX 10W 3.62 A
TX 12W 3.78 A

All the above testes were done with a digital meter on
the 10 amp
 scale.
I would say the KPA3 adds a constant 0.6 Amp for any
given power level 
below 12.1 Watts.

I started the inventory last night about 6:00 PM and
finished it
 tonight 
about 8 PM. I had a fire run, slept, went to a meeting
etc.
so my build time must have been about the magic 10
hours.
I sure do like the receiver but have just scratched
the surface of what
 
it can do.
It was worth the wait.
73
Ken W0CZ
-----------------

Hope this helps.

73, Ty, W1TF, K1 #1423 waiting for a K3

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