[Elecraft] How far can the KPA1500 amp be from the PS?

[Edward R Cole]

Ted,

I wonder if the load center panel is mounted on an exterior wall?  If 
so running a penetration from the panel to outside might be 
better.  Then you could route it in conduit or exterior cable routed 
along exterior to a good spot to bring it back inside at the lower 
level.  That still might require running cable along interior wall surface.

I ran about 35-foot of 8-4 cable from my 200A service panel in our 
utility hall by running it thru pvc conduit thru the floor to our 
4-foot high crawl space.  Then looped  across the underside of floor 
joists to another floor penetration in the ham shack where I 
installed a 80A panel.  I installed one 240v 20A breaker for my QRO 
amplifier PS and added two 120v 20A duplex boxes which run my 50A 
Astron 12v station supply and a MOT 24v 100w repeater PS for 24v 
stuff.  240vac was run thru conduit to 4-inch box with 20A twist-lock 
receptacle for the amp cord to plug into.

Now I am converting to 50v LDMOS amps and need to provide them 
240vac.  Two will be kilowatt amps and another 600w.  Each to be 
installed at the base of a different tower so will have 120-foot, 
100-foot, and 70-foot 240vac cable runs outside.  All get to run 
inside 2-inch conduit and will have load centers at the amplifier 
end. Two will route from the hamshack 240v panel.  Third has not been 
determined (might be second 240v line direct from the house main panel).

I am designing remote control panels for each amplifier to control 
and monitor parameters.  All are no-tune single band amps so that is 
much simpler than a KPA500 or KPA1500.

But my circumstance is much easier with open crawl space and simple 
R-19 fiberglass insulated wooden walls; quick work with a hole 
saw.  Working one summer in college as electrical apprentice doesn't 
hurt knowing what to do.  My dad's barn got wired after that summer (for free).

73, Ed - KL7UW
   http://www.kl7uw.com
Dubus-NA Business mail:
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