Hello--
Larry, NE1S, suggested that I post the specs of the following transformer; in case anyone is interested, I'll bring it to NEARFest on Friday. I apologize in advance if this posting is out of line.
Manufacturer: unknown; the numbers stamped in the end bell read...
22.1070
133735
Height: 9.25 inches plus 1 inch for high-voltage bushings
Depth: 10.25 inches across end bells
Width: 7.25 inches
Weight: heavy. Very heavy.
Approximate core-stack dimensions: 5.5 inches deep by 7.25 inches wide by 9 inches high.
Mounting style: above-chassis or on panel. All connections exit the upper side of the end bells
via ceramic feedthrough insulators.
Mechanical condition: good-plus; paint is relatively intact, with some traces of light surface rust.
Electrical outputs: two 110V single-phase separate primary windings jumpered for 220VAC. primaries measure 0.3 ohms DC resistance (each).
Secondary: center-tapped winding 38-0-38 ohms, with subtaps at 14.6-0-14.6 ohms DC resistance. Center tap is not connected to case.
AC voltages: applying 13.7 VAC to the 220-volt primary produces 173-0-173 VAC across the entire secondary and 138-0-138 VAC across the subtaps.
Scaling the voltages yields 2778-0-2778 volts across the entire secondary, and 2216-0-2216 volts across the subtapped secondary.
At the moment, I can't locate a reference that would translate the core dimensions to an approximate VA capability, but I'll guess that this tranny would very comfortably provide a full kilowatt (and probably several kilowatts) to a tube transmitter. I'd recommend driving the primary from a Variac so that one could easily adjust plate voltage.
Make me a reasonable offer under $50, and it's yours!
To find me, look for a tall (6 ft., 4 inches) guy wearing a hat, a name tag and carrying a canvas
tote bag (plus my usual clothing<g>). I do a lot of wandering, so chances are we'll rub shoulders at least once on Friday. Or, e-mail me at brad.thompson@valley.net and we can arrange to meet.
Thanks, and 73--
Brad AA1IP
