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Hey Y'all;
Trying to switch out a 230V PT for a USA voltage one in a 25W fireball (e633) but hit a snag; There is no information about what the old transformer's secondaries put out! On top of that I do not have a step up transformer, so I cannot measure the voltages out of the old one for comparison. Google turns up nothing.
The new transformer was sent directly from an ESP/LTD rep in California and fits perfectly so I have no reason to assume it is incorrect.
AVAILABLE TAPS AS LABELED ON THE NEW TRANSFORMER:
"SEC:"
(9/10) 10,8V <---- ????
(11-12) 265V <---- This is obviously the B+, the schematic shows one of the hookups leading to the 400V filter caps so that has to be it right?
(13-14) 7,1V <----- This would be fairly close to a normal AC heater voltage. The schematic looks like it shows v4-v6 as AC heaters, but v1-v3 are seperated by a bridge rectifier and presumably run of DC, which i'm guessing would account for the higher than usual value off the transformer?
(15-16) 28V <---- I am guessing that this is our bias tap since the schematic shows a +24V supply out off the same secondary line that includes a bias adjustment pot.
I'm in touch with an ENGL rep who is very helpful but on german time, also I am doing my best to turn this around for a customers gig, so any insight y'all can help with would be great! I'll attach the page of the schematics that contains the Secondary wiring hookups (FS6,FS7, / FS9,FS10, / FS11, FS12)
Trying to switch out a 230V PT for a USA voltage one in a 25W fireball (e633) but hit a snag; There is no information about what the old transformer's secondaries put out! On top of that I do not have a step up transformer, so I cannot measure the voltages out of the old one for comparison. Google turns up nothing.
The new transformer was sent directly from an ESP/LTD rep in California and fits perfectly so I have no reason to assume it is incorrect.
AVAILABLE TAPS AS LABELED ON THE NEW TRANSFORMER:
"SEC:"
(9/10) 10,8V <---- ????
(11-12) 265V <---- This is obviously the B+, the schematic shows one of the hookups leading to the 400V filter caps so that has to be it right?
(13-14) 7,1V <----- This would be fairly close to a normal AC heater voltage. The schematic looks like it shows v4-v6 as AC heaters, but v1-v3 are seperated by a bridge rectifier and presumably run of DC, which i'm guessing would account for the higher than usual value off the transformer?
(15-16) 28V <---- I am guessing that this is our bias tap since the schematic shows a +24V supply out off the same secondary line that includes a bias adjustment pot.
I'm in touch with an ENGL rep who is very helpful but on german time, also I am doing my best to turn this around for a customers gig, so any insight y'all can help with would be great! I'll attach the page of the schematics that contains the Secondary wiring hookups (FS6,FS7, / FS9,FS10, / FS11, FS12)
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