Posted by
Bill K9YEQ on
Jan 26, 2011; 12:05am
URL: http://elecraft.85.s1.nabble.com/120-vs-240-tp5961036p5961089.html
I feel very fortunate.... My 240 panel is within 20' of the shack. I wired
it myself and I think I spent <$75 for all the hardware.
Bill
K9YEQ
-----Original Message-----
From:
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[mailto:
[hidden email]] On Behalf Of Edward R. Cole
Sent: Tuesday, January 25, 2011 5:37 PM
To:
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Subject: [Elecraft] 120 vs 240
Having recently run 245 vac to my "shack", I can say the HVPS runs well.
Key down at 1400w on my 2m-8877 and the line voltage drops 5v
(240 vs 245). I guess that is pretty good. I ran 40amp wiring (35-feet of
#8awg 4-cond) and split out two 120vac 20A ckts to run some of the other ham
equipment so that I am not loading the three outlets in the room so heavily.
The room outlets run the computer stuff, rotators, lights, test equipment
and workbench supplies. The 12v-50A, 28v-25A, and 8877 PS are run on the
245 vac ckt.
It cost me about $300 for materials. I had to buy 100-feet of wire so that
ran it up more than what I needed. But I made a emergency gen. 240v
ext.cord out some of that. We have a 6500w Honda standby generator that
powers the whole house. I could even run QRO on the gen.
73, Ed - KL7UW
-------------------------------
The quality of the 120V run makes a big difference. For example, if it's a
15A branch circuit feeding multiple outlets across several rooms -- and if
wiring is formed with pressure-contact receptacles, -- and the receptacle
you need is on the end of the string, don't count on a stiff supply.
By contrast, if a dedicated 20A branch circuit is run only to the shack,
uses clamp terminals, and the feed is shared between the amp and a few
low-current devices, then output power should be more predictable with
minimal voltage sag at the 500W level.
Anyone considering a new 120V circuit to the shack to avoid these problems
(in my case it was dimming lights) may want to consider pulling a companion
4-wire 240V circuit to handle all commercial amps, new and old.
Paul, W9AC
73, Ed - KL7UW, WD2XSH/45
======================================
BP40IQ 500 KHz - 10-GHz www.kl7uw.com
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DUBUS Magazine USA Rep
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*temp not in service
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