Hammond PWDA13076 Audio Driver Transformer, 6AU6 Plate to Push-Pull Grids

The PWDA13076 is a Peter W. Dahl audio driver transformer from Hammond's PWDAHL series of magnetics for amateur radio products. Its part page lists it as "HALLICRAFTERS SX-28 AUDIO", and the series table lists it for the Johnson Viking II and Johnson Viking Ranger audio driver positions (SNC P/N 1503, EFJ P/N 22.753). It suits restorers and builders of vintage amateur radio transmitters.

The primary is 100 VAC @ .030A CCS, identified in the Viking II entry as a single 6AU6 plate. The secondary is S1) 84 VCT @ .036A CCS, driving push-pull 807 grids in the Viking II entry and push-pull 1614 / 6L6 grids in the Viking Ranger entry.

The transformer is built on an EI-62 square core, style 3, with an approximate weight of 1 lb; the shipping weight is 1 lbs (0.45 kg). It is listed as RoHS and REACH compliant.

Peter W. Dahl transformers are usually built to order one at a time, and many designs are decades old, so the manufacturer recommends confirming availability by phone or e-mail. Check the tube line-up in your transmitter against the 6AU6 plate and push-pull 807 or 1614 / 6L6 grid entries above before ordering.