[Elecraft] 120V vs 240V

[FredJensen]

On 2/17/2011 12:45 AM, Lew Phelps K6LMP wrote:
> I own a 1929 Hudson Town Sedan. Its  OEM electrical system was 6 volt positive ground. Later Hudsons were 12 volt negative ground.  From my contact with the old car restoration community, my sense is that in the early years (up to about 1950) the industry was about evenly split between positive and negative ground. They finally standardized on 12 volt negative, more or less in the 60s.
I had a 1953 Dodge truck in college at the end of the 50's.  6V, 
positive ground, fairly beat up, bad brakes.  I ran a 40m ARC-5 off of a 
vibrator power supply with a Gonset "converter" feeding the AM radio 
with an outboard BFO for CW.  The vehicles we had in SE Asia in the US 
military were mainly 12V by 1964.   Our multi-fuel 5-ton trucks were 
24V, I think to get the engines started.

Stupid question:  I was under the impression that the KPA500 was solid 
state, no-tune.  A couple of references on this long "Voltage Thread" 
have caused me to wonder.  Fact would be welcome.

73,

Fred K6DGW
Auburn CA

PS S9DX is S9 on 14011 as I type, up 3 got him for me, they leave 
tomorrow I think