Fred

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: : : : : : : : : : :Sir Fred . . . . . : : : :WHUT ! . . . .? . . . like . . .like . . .like . . . your local township actually has a transformer winding emporium and tonsorial parlor? : : : :I possibly might give that info in two aspects: : : :1 . . . with the observation of the tubes involved, and with that "wierdo" 2W3 power rectifier needing its separate 2V winding for its filament. : : :And then the mentioned B+ derivation circuit, by being of halfwave derivation, would be wanting about a high voltage secondary of ~300VAC for its raw supply level and a 40-50 ma rating would be adequate up to the potential maximum drive level for the shaking of the walls. ( out in 'ole Phideaux's Doghouse ! ) : : :The bulk of the tubes would then be needing ~ 2 amps at 6.3 VAC for their filament supply level. : : : :2 . . . Now if it was MY task to PRECISELY solve . . . I would be pulling out ANY piece of my equipment that had a transformer with its HV secondary winding having UPWARDS of that 300V raw AC supply level. : : :Pull out an additional 6.3VAC filament transformer and a 5VAC filament transformer . . .ORRRRRR . . if you no havvee such . . . yet another piece of equipment that has transformer windings with 6.3VAC @2 Amps AC and 5V@2 Amps AC supply capabilities. (Thats VERRRRRRY commonplace) : : :One then uses jumper clips or temporary wiring busses to connect up the donor 6.3VAC and 5VAC supply sources to "Ye Olde Crosley" and with the minor need of inserting an ~ 1.5 ohm 5 watt power resistor in series with one lead of the the 5VAC 2W3 filament supply source to thereby alter its AC voltage output down to the required 2.5VAC. : : :Then the HVAC donor source is connected to a VARIAC such that the AC line input voltage can initially be started down low enough, to then be able to slowly run up the Variac and observe the rising DC output from the Crosley 2W3, until it then reaches its specified rectified 230VDC , and then run up the volume and watch for ~180VDC at the plate of the 6K6 AF output tube. : : :Measure the secondary HVAC that is now present on the secondary high voltage winding of the donor transformer circuitry, used in powering up the Crosley to acquire that design outbut DC voltage value. : : :Take one each DVM and place in AC current mode and insert in series with the HVAC supply to the plate of the 2W3 to then power up again and see what the Crosleys actual transformer current requirement is, when warmed up and run up to max volume output. : : : :Thassitt . . . : : : : : :73's de Edd : : : :

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:A friend pointed me towards you. Says you are the best place for novice help.
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:I have a Crossley 628 and the transformer is burnt out.I can get the transformer rewound but I do not know what the secondary High Tension side should be wound to.The workshop would like this figure in Volts and current prior to load. Are you able to help please
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:Kind regards. Fred Hay
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