Hi Greg,
As Dave says, Lyle, KK7P has a web page with most everything
that you need to know to remote the KAP100 and KAT100 in an EC2.
However, if you want to remote it without installing the KIO2 in the K2,
the circuit diagram on Lyle's web page is not quite right (and he does
say "Note that it is untested. The risk is entirely yours."). The
correct diagram is on the Elecraft Applications Notes under "Control
Cable to Use a KAT100 without a KIO2". I ran my K2 with my KAT100 for
about a year using this circuit, since I planned to add the KPA100
eventually and didn't want to buy the KIO2 just for the interim... (I've
now added the KPA100 internally in the K2, but I may eventually put it
and the KAT100 in a separate EC2).
Bob W1SRB
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Dave Van
Wallaghen
Sent: Thursday, May 17, 2007 9:17 AM
To: 'Greg Derda'; elecraft@mailman.qth.net
Subject: RE: [Elecraft] K2/KPA100 vs. EC2/KPA100
Hi Greg,
If you search the list archives, you'll find all kinds of info for this.
I put my KPA100 and KAT100 in an EC2 last fall and find it to be a
really slick setup. Lyle, KK7P has a nice webpage full of pics and
details for doing the split: http://www.kk7p.com/k2kpa100.html
To answer your questions:
> 1. Whether the KPA100 behaves (i.e., "appears") the same to the K2 as
> if it were internal?
Yes. As long as the AuxBus connection exists.
> 2. Is it a simple plug-n-play to either use or not use the EC2 setup?
I assume you mean pulling the "basic" K2 out of the setup for
portable/separate use - Yes. Unplug the RF connections and AuxBus cable
and your ready to go.
> 3. For QPR ops with the EC2 setup, can you run just the KAT100
> without having to power the KPA100?
The KPA100 will still have "minimal" power applied. It will be in bypass
mode when you turn the power pot down below 10 watts. And yes the KAT100
is still active. (This is the case whether the KPA100 is separated or
not).
I put the KIO2, KAT2 and KB2 in my basic K2 when I split the KPA100 out.
Having a KIO2 installed makes the split very clean and easy. Although,
you can do the split without the KIO2 - Lyle describes that in detail.
His description using the KIO2 can be found toward the bottom of that
page.
Hope this answers your questions.
Dave W8FGU
> -----Original Message-----
> From: [EMAIL PROTECTED] [mailto:elecraft-
> [EMAIL PROTECTED] On Behalf Of Greg Derda
> Sent: Thursday, May 17, 2007 8:50 AM
> To: elecraft@mailman.qth.net
> Subject: [Elecraft] K2/KPA100 vs. EC2/KPA100
>
> Hi all,
>
> I just finished building K2 #6100, and will start my KSB2 tonight. I
> am a no-code General, and work primarily SSB QRO, although I look
> forward to QRP'ing with my K2. In most cases, for any portable work I
> might do, I will most likely carry at least two "enclosures": the K2
> and some sort of antenna tuner. That said, two obvious configuration
> for my K2 are:
>
> 1. K2/100 with separate KAT/100
>
> 2. K2 with EC2/KPA100/KAT100 (and KIO2 in the K2)
>
> Question is: What are the obvious benefits or quirks between the
> above setups? Specifically, I am wondering if with the EC2 setup.....
>
> 1. Whether the KPA100 behaves (i.e., "appears") the same to the K2 as
> if it were internal?
>
> 2. Is it a simple plug-n-play to either use or not use the EC2 setup?
>
> 3. For QPR ops with the EC2 setup, can you run just the KAT100
> without having to power the KPA100?
>
> Any and all wisdom will be greatly appreciated!
>
> Thanks and 73,
> Greg
> KI4MMM
>
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