A Really, Really, Really Dumb Question

[Buddy Brannan]

Hi,

Yeah, really. Exceedingly dumb, but I figure I'd better ask anyway.

I have a K2/100. Naturally, this means it has the SO239 antenna connector on the 100-watt amp, It also, of course, still has the BNC connector from the original assembly of the original K2. So, with the KPA100 integrated, is it still possible (with the amp turned off, naturally) to use the BNC antenna connector? It seems to me it's possible, and that I actually did connect an antenna there once, but just want to be sure that it doesn't matter much, so long as the amp is disabled.
--
Buddy Brannan, KB5ELV - Erie, PA
Phone: [phone] or 888-75-BUDDY



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[Matthew Pitts]

Buddy,

I believe you would have to physically disconnect the RF and power connections on the main board of the K2, as well as unhooking the connection on the front panel that goes to the integrated KIO interface before the original K2 BNC will work properly.

Matthew Pitts
N8OHU
Sent from my Wireless Device

-----Original Message-----
From: Buddy Brannan <[hidden email]>
Sender: [hidden email]
Date: Sun, 18 Sep 2011 20:15:03
To: <[hidden email]>
Subject: [Elecraft] A Really, Really, Really Dumb Question

Hi,

Yeah, really. Exceedingly dumb, but I figure I'd better ask anyway.

I have a K2/100. Naturally, this means it has the SO239 antenna connector on the 100-watt amp, It also, of course, still has the BNC connector from the original assembly of the original K2. So, with the KPA100 integrated, is it still possible (with the amp turned off, naturally) to use the BNC antenna connector? It seems to me it's possible, and that I actually did connect an antenna there once, but just want to be sure that it doesn't matter much, so long as the amp is disabled.
--
Buddy Brannan, KB5ELV - Erie, PA
Phone: [phone] or 888-75-BUDDY



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[Don Wilhelm-4]

Buddy,

Yes, it does matter - that is why there is a boot for the QRP BNC
connector supplied with the KPA100 kit.
When the KPA100 is installed, the antenna output must be from the SO-239
jack.
Failure to do so will result in incorrect power control from the K2, and
the QRP BNC connector will be connected to the antenna and the input of
he KPA100.

Unless you pyhsically remove the KPA100, use the SO-239 jack for RF
output when the KPA100 is installed.

If you want to operate QRP with the 0.1 to 15 watt range, power the base
K2 from the coaxial power jack and do not connect power to the KPA100
APP connector.  That will give you full power control range for the QRP
level K2 - but the RF output should come from the SO-239 jack on the KPA100.

73,
Don W3FPR

On 9/18/2011 8:15 PM, Buddy Brannan wrote:
> Hi,
>
> Yeah, really. Exceedingly dumb, but I figure I'd better ask anyway.
>
> I have a K2/100. Naturally, this means it has the SO239 antenna connector on the 100-watt amp, It also, of course, still has the BNC connector from the original assembly of the original K2. So, with the KPA100 integrated, is it still possible (with the amp turned off, naturally) to use the BNC antenna connector? It seems to me it's possible, and that I actually did connect an antenna there once, but just want to be sure that it doesn't matter much, so long as the amp is disabled.
> --
>
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