For sale is a power transformer for a tube amplifier. It's chassis mount so it takes a bit of work with a nibbler for it to fit on the top plate. The upside is that it transfers heat to the chassis better.
It has cloth leads in good shape and I put on some new 10-24 nuts so you won't have to hunt those down. I can get the primary and secondary DCR in the next couple of days so someone could model it in Duncan Amps PSUD II
It's quite beefy I'd estimate it at around 6.5 lbs. The laminate stack is very thick and should work great for a 50 watt Push-Pull EL34 amp as an example. It has both 12.6 and 6.3 volt windings so you could run some 12AU7s in the signal and phase inversion sections and 6.3 for the output tubes and use the 5 volt for the rectifier if so desired. If you go with solid state diodes you'll only need two for full wave rectification so you can splurge on expensive ones and should be able to push over 400 volts for your B+ (probably 25 volts or so lower with tube rectification).
Tested at 123.1 AC line voltage at my residence I measured the following voltages with the related colored wires with the transformer unloaded. The higher filament voltages are due to the higher AC input than typical and being unloaded.
Black-Black: AC in (123.1 volts)
Red-Red/Yellow-Red: 373-0-373 volts (746 Center tapped)
Green-Green:14.46 volts
Brown-Brown: 7.22 volts
Yellow-Yellow: 5.41 volts
This should handle a quad of EL34 on the filaments. Four to five 12AUX tubes, and 3 amp rectifier tubes like a 5U4GB and at least 250 ma on the HV.
Price is $50 plus $18 shipped to the lower 48 via a USPS medium flat rate box. Sorry, shipping only to the US.
It has cloth leads in good shape and I put on some new 10-24 nuts so you won't have to hunt those down. I can get the primary and secondary DCR in the next couple of days so someone could model it in Duncan Amps PSUD II
It's quite beefy I'd estimate it at around 6.5 lbs. The laminate stack is very thick and should work great for a 50 watt Push-Pull EL34 amp as an example. It has both 12.6 and 6.3 volt windings so you could run some 12AU7s in the signal and phase inversion sections and 6.3 for the output tubes and use the 5 volt for the rectifier if so desired. If you go with solid state diodes you'll only need two for full wave rectification so you can splurge on expensive ones and should be able to push over 400 volts for your B+ (probably 25 volts or so lower with tube rectification).
Tested at 123.1 AC line voltage at my residence I measured the following voltages with the related colored wires with the transformer unloaded. The higher filament voltages are due to the higher AC input than typical and being unloaded.
Black-Black: AC in (123.1 volts)
Red-Red/Yellow-Red: 373-0-373 volts (746 Center tapped)
Green-Green:14.46 volts
Brown-Brown: 7.22 volts
Yellow-Yellow: 5.41 volts
This should handle a quad of EL34 on the filaments. Four to five 12AUX tubes, and 3 amp rectifier tubes like a 5U4GB and at least 250 ma on the HV.
Price is $50 plus $18 shipped to the lower 48 via a USPS medium flat rate box. Sorry, shipping only to the US.
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