[Elecraft] KPA100-1

[Ron D'Eau Claire]

You do *not* need to remove anything from your existing K2 cover. The KIO2,
ATU and the battery (if installed) can stay right there. What Don was saying
is that you get a NEW top cover in which the KPA100 is built and it mounts
in place of the current top cover. So you can change from a K2/100 to a
low-power K2 with built in ATU, battery and KIO2 in less than a minute for
going into the field! 

BTW, the KPA100 includes the KIO2 so you do not lose that interface when
adding the KPA100. 

That's the way Elecraft designed the system and it makes for a neat,
efficient and compact rig. 

If you want to run QRP, you can disable the KPA100 with a simple MENU
command or just turn down the POWER knob. If you want to use a low-current
power supply and ensure the KPA100 doesn't get switched on, just plug it
into the coaxial power connector you are now using instead of the Anderson
PowerPole connector on the KPA100. That isolates the KPA100 so it can't draw
power (the total drain on the K2 does go up a couple of hundred mA for some
ancillary circuits in the KPA100 that get power from the main K2 supply, but
the amplifier cannot switch on and draw current without 13 VDC at the
Anderson connector). 

As others noted, some have moved the KPA100 into a separate enclosure
anyway. I haven't played with that configuration, but it sounds like you'll
need to disconnect the KIO2 interface and switch your computer over to the
KPA100's connector anyway. 

Ron AC7AC

-----Original Message-----
From: elecraft-bounces at mailman.qth.net
[mailto:elecraft-bounces at mailman.qth.net] On Behalf Of KJ3D
Sent: Sunday, March 04, 2007 7:25 AM
To: w3fpr at arrl.net; Elecraft at mailman.qth.net
Subject: RE: [Elecraft] KPA100-1


Don, John & Gregg,

Thanks for taking the time to respond.  I think I will put the new stuff in
a EC2 enclosure and leave the QRP K2 alone - particularily since I already
have the KIO2 installed.  Seems that might eliminate some of the heating
isues as well.

72/73,

Tom, kj3d 

-----Original Message-----
From: elecraft-bounces at mailman.qth.net
[mailto:elecraft-bounces at mailman.qth.net] On Behalf Of Don Wilhelm
Sent: Sunday, March 04, 2007 9:36 AM
To: KJ3D; Elecraft at mailman.qth.net
Subject: RE: [Elecraft] KPA100-1

Tom,

You existing KAT2 (and everything else in the QRP K2 top cover) is removed
and the KPA100 installs in place of it.

There is another option available to you - if you want to retain the QRP K2
for portable use, then mount the KAT100-2 and the KPA100 together in an
external EC2 enclosure.  That configuration does require the KIO2 in your
QRP K2, but it works well.  If you choose this configuration, your KAT2
stays in place but is automatically bypassed with the output routed to the
ANT1 connector.

If you want the KPA100 mounted on the K2 instead of externally, order the
KAT100-1 (the lower height enclosure is included).

The KAT100 can be located anywhere in the shack that your cable length to it
will allow.  The kit includes all cables and connectors except the coax to
the KAT100.  You need a control cable between the K2 and the KAT100, and
that same cable will become a 'Y' cable if you also wire the connector at
the K2 end with the cable for attaching to a computer serial port (that wire
is included too).

73,
Don W3FPR

> -----Original Message-----
>
> Good Morning Group,
>
> I think I may purchase the 100 watt hat and the KAT100-1 ATU in the
> near future.  I have three questions.
>
> 1.  I hear talk of Y connectors, etc.  Will my two new kits contain
> all the bits to hook up to my K2?
>
> 2.  Does my existing ATU stay in the circuit?
>
> 3.  Does the new ATU have to be physically located next to or beneith
> the K2?  - can I place it - say a foot away?
>
> OK, 3 and a half questions.
>
> Thanks, es 72 (for now)
>
> Tom, kj3d
>
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