skipwave
Well-known member
I've got a transformer here (actual a bunch of them) with the following:
PRI..........117V.......WHT-BLK
...............117V.......ORG-RED
SHIELD...................GRN-YLW
SEC.....263V 100ma.....YLW
...........15.3V 1A..........GRN
I want to use this for tube mike preamps, but a few things seem unusual about it.
-Two 117V primaries? Is that to allow series operation with 220V mains (234V?)?
-SHIELD? What?
-I want DC for the heaters, so what's the most efficient way to get 12VDC from 15.3VAC? I could just rectify then calculate a resistor to drop it.
Please forgive the newby questions. I just haven't encountered these things before.
PRI..........117V.......WHT-BLK
...............117V.......ORG-RED
SHIELD...................GRN-YLW
SEC.....263V 100ma.....YLW
...........15.3V 1A..........GRN
I want to use this for tube mike preamps, but a few things seem unusual about it.
-Two 117V primaries? Is that to allow series operation with 220V mains (234V?)?
-SHIELD? What?
-I want DC for the heaters, so what's the most efficient way to get 12VDC from 15.3VAC? I could just rectify then calculate a resistor to drop it.
Please forgive the newby questions. I just haven't encountered these things before.