[Amps] Henry 3k Filament transformer taps

[Glen Zook via Amps]

125-VAC +/- 2-volts / 250-VAC +/- 4-volts is now the "norm" for most major electric companies in the United States with voltages on the "+" side being prevalent during the warmer months when air conditioning use is at a peak.

In this area, the Dallas, Texas, area, such has been the fact since the 1970s.

It has many many decades since 110-VAC was the "norm".  Then came 115-VAC, then 117-VAC, then 120-VAC, and, today, 125-VAC.

Running higher voltage allows more KWH to be delivered without the need for rebuilding of the distribution lines.  Rebuilding these lines would require an astronomical outlay of cash which then would result in considerably higher electric rates.  The rates are high enough as is.  But, nothing like they would be if a major overhaul of the distribution systems had to take place.
 
Glen, K9STH 

Website:  http://k9sth.net


On Monday, September 8, 2014 11:01 PM, Robert Morris <robrk at nidhog.net> wrote:
 


Are you sure it's 240? I'm sitting watching my fancy UPS, on the TV stuff, beep  with 124(248) coming out of the wall.

Lots of stuff in the junk box says 115 if not 110. Bet your transformer is from the 115 days.
You need a variac on the fils, anyway.

Isn't nice we pay by KWH. Don't have raise the price, just crank up the volts....



On Sep 7, 2014, at 7:09 PM, glenn riccio wrote:

Hello all you henry radio amp owners. I just bought a  Henry 3k filament
xfrmer off the internet. It is supposed to deliver 7.5 v @ 21 amps. There
are taps on the primary side to adjust output .  I cannot get less than 8.75
volts out. My input voltage is 240vac. I tried all the taps on the primary
side using #1 as the common leg. It is a EC1216a  transformer. I want to use
it for my 4-1000a amp I'm building. 

I suppose I could call or e-mail henry radio but they might be annoyed that
I'm not using it for  one of there amps. Any help would be appreciated. 73
Glenn K7gfr

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