Hammond PWDP13124 Collins 30S-1 Plate Transformer, 50 Hz Version

The PWDP13124 is the Collins 30S-1-50 plate transformer: the 50 Hz version of the 30S-1 plate transformer, built from the Peter W. Dahl design files. It is intended for owners and restorers of the Collins 30S-1 linear amplifier, particularly where the mains supply is 50 Hz, since the primary is rated 115/230 VAC 50/60 Hz single phase with HI-LO taps.

Two secondaries are listed in the ordering table: S1 at 6320 VCT @ 350 mA CCS and S2 at 245 VAC @ 350 mA CCS. The part drawing labels the secondary leads as WHT 2331V (3255V) on both outer leads, WHT/BLK 0V center tap, YEL 186V (260V) on terminal 11 and 0V on terminal 10. The primary terminals are shown as 115V (LOW) 1, 115V (HI) 2, 0V 3, 115V 4, 0V (HI) 5 and 0V (LOW) 6.

This is a substantial unit: it is wound on an EI-300 x 3.375 core in style 4 of the series style sheet, with an approximate weight of 67 lb and a shipping weight of 67 lbs (30.39 kg). The drawing shows a Dahl label marked COLLINS 30S-1, PWDP13124, date code and MADE IN CANADA, plus a Hammond label and terminal label.

The PWDP13124 is listed as REACH and RoHS compliant. As with other PWDAHL Series units it is usually built to order, so confirm availability before scheduling a rebuild.