[Elecraft] Relocating my KPA-1500 - need cable

[lists at w2irt.net]

So I did a bit of measuring today. It looks like I only need somewhere around 10 to 13 feet of DE15 extension. Digi-Key sells the 15’ version for $21 (plus shipping). A bit spendy, but if it keeps the amp far away from the shack I’ll be happy…and so will the XYL <grin>. Getting the molded plug downstairs will be a PITA, but I guess I can enlarge a couple of the ½” holes in the floor with a dremmel or something.

 

- pjd

 

From: Bob Wilson, N6TV <n6tv at arrl.net> 
Sent: Friday, June 3, 2022 3:23 AM
To: Peter W2IRT <lists at w2irt.net>; Elecraft Reflector <Elecraft at mailman.qth.net>
Subject: Re: [Elecraft] Relocating my KPA-1500 - need cable

 

On Thu, Jun 2, 2022, 11:24 PM <lists at w2irt.net <mailto:lists at w2irt.net> > wrote:

Just so I’m clear on the concept, you’re suggesting taking my existing AUX cable from the Y-box to the amp on the desk, and adding a DB-15 straight-through extension to it, and connecting the far end of that extension into the relocated KPA-1500 in the basement, yes?

Yes, though it doesn't matter (electrically) which device connects with the Elecraft AUX cable.    You could plug the extension into the Y-BOX and the AUX cable into the amp.  FYI, the correct term is DE15 (sometimes HD15 for High Density).  No such thing as DB15 or DB9 though, they are commonly misused. 

I can supply a 2.5' M/M cable from rig to Y-BOX if you need one.

[pjd] At the moment I have the Y-box plugged into the K3s, with one line going to the amp, and a second line sending band data to my Ameritron RCS-12 automatic antenna switch controller at the base of the tower. 

The controller (band decoder box) is usually located in the shack, with the relay box outside.  That should be more reliable.

At the moment I have no plans to replace that, despite the fact it’s basically junk that doesn’t work automatically when the shack is below 65°F, which is the case all winter long! But I’m trying to see why I would need to change out the cable from the radio to the Y-box. Am I missing something?

If it's 5 ft long, that adds to the total length between K3 and AMP and RCS-12 controller.  If you don't need 5 ft between rig and Y-BOX, replacing it with a 2.5 ft cable will reduce the  the total length (and loss) by a little bit.  But it will probably won't make any difference.

 

73,

Bob, N6TV