Hammond PWDM13220 Johnson Viking II T4 Modulation Transformer

The PWDM13220 is described on the manufacturer's part page as the Johnson Viking II MOD T4, a modulation transformer for the Johnson Viking II transmitter. It belongs to the PWDAHL Series, a listing of transformers and chokes taken directly from the Peter W. Dahl files of magnetics for amateur radio products.

The part page lists a shipping weight of 5 lbs (2.27 kg). PWDM13220 is marked REACH compliant and RoHS compliant, and carries UNSPSC classification 39121301. Winding impedances, voltage ratings and core details are not published on the part page for this part number, so confirm the electrical specification against your Viking II before ordering.

This part is intended for amateur radio operators, collectors and repair technicians restoring the modulator section of a Johnson Viking II. Because the Viking II uses more than one modulation-related transformer, double-check the reference designator in your schematic against the T4 designation listed for this part.

Dahl-series units are usually built to order one at a time, and parts already built are shown with Hammond part numbers. Many of these designs are decades old, so the series recommends confirming availability by phone or e-mail. Stock units can usually be shipped next business day.