Hammond PWDM13044 Johnson Valiant Modulation Transformer
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224-955-1644Key Features
- Modulation transformer for the Johnson Valiant
- Cross-references EFJ P/N 22.1285 and SNC P/N P2998
- Primary 840 VCT at 0.212A CCS, 7300 ohms P-P
- Secondary 450 VCT at 0.300A CCS, 2100 ohms RF PA
- EI-125 x 1.5 core, Style 5, approx. 5 lbs
- REACH and RoHS compliant
The PWDM13044 is a modulation transformer for the Johnson Valiant, cross-referenced in the Dahl ordering table to EFJ P/N 22.1285 and SNC P/N P2998. It is intended for Valiant owners and technicians returning the transmitter to full AM operation. Other Johnson modulation transformers in the same Dahl listing include PWDM13007 for the Viking Ranger II and PWDM13062 for the Viking 500.
The primary is 840 VCT at 0.212A CCS with a 7300 ohm plate-to-plate impedance. The secondary S1 is 450 VCT at 0.300A CCS, presenting 2100 ohms to the RF PA.
It is wound on an EI-125 x 1.5 lamination core in Style 5 of the series style sheet. Approximate weight is 5 lbs, and the part page shipping weight is 5 lbs (2.27 kg). PWDM13044 is REACH compliant and RoHS compliant, and is identified by UPC 623980240251 and UNSPSC 39121301.
Designs in the PWDAHL Series come straight from the Peter W. Dahl files of magnetics for amateur radio products. They are usually built to order one at a time, and units already built are shown with Hammond part numbers. The series recommends confirming availability by phone or e-mail; stock units can usually be shipped next business day.
Ideal For
- Johnson Valiant AM restoration
- Modulation transformer replacement
- Vintage transmitter repair
Overview
| Series | Peter W Dahl Transformers (PWDAHL Series) |
| Part Number | PWDM13044 |
| Product Type | Modulation Transformer |
| Series Focus | Magnetics for Amateur Radio Products |
| Short Description | JOHNSON VALIANT MOD XFMER |
| Original Part References | EFJ P/N 22.1285, SNC P/N P2998 |
| Ordering Table Description | JOHNSON VALIANT MOD XFMR EFJ P/N 22.1285, SNC P/N P2998 |
Electrical
| Primary | 840 VCT @ 0.212A CCS (7300 OHMS P-P) |
| Secondary | S1) 450 VCT @ 0.300A CCS (2100 OHMS RF PA) |
Identifiers
| UPC | 623980240251 |
| UNSPSC | 39121301 |
Packaging & Shipping
| Shipping Weight | 5 lbs (2.27 kg) |
| Approx. Weight (Ordering Table) | 5 lbs |
Construction & Finish
| Core | EI-125 X 1.5 |
| Style (Per Series Style Sheet) | 5 |
Compliance & Certifications
| RoHS Compliant | Yes |
| REACH Compliant | Yes |
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Frequently Asked Questions
Which original parts does PWDM13044 cross-reference?▾
EFJ P/N 22.1285 and SNC P/N P2998, the Johnson Valiant modulation transformer.
What is the primary rating?▾
840 VCT at 0.212A CCS, 7300 ohms P-P.
What is the secondary rating?▾
450 VCT at 0.300A CCS into 2100 ohms RF PA.
What does it weigh?▾
About 5 lbs (2.27 kg).
Is this transformer kept in stock?▾
The series notes that these transformers are usually built to order one at a time, and that stock units can usually be shipped next business day. Confirming availability by phone or e-mail is recommended.
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