Hammond PWDM13007 Johnson Viking Ranger II Modulation Transformer
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224-955-1644Key Features
- Modulation transformer for Johnson Viking Ranger II (SNC P/N P2429, T2)
- For push-pull 7027A's, 32 watts
- Primary 10600 ohm PP, 695 VCT at .072A CCS
- S1 19.8 VAC at 0.050A CCS for 4% feedback
- S2 495 VCT at .065A AC and .130A DC
- EI-087 x 1 core, Style 1, approx. 2 lbs
- REACH and RoHS compliant
The PWDM13007 is a modulation transformer for the Johnson Viking Ranger II, listed in the Dahl ordering table as SNC P/N P2429, reference T2. It is designed for push-pull 7027A modulator tubes at 32 watts, and serves amateur radio operators and restorers returning a Ranger II to AM service.
The primary is 10600 ohm push-pull, 695 VCT at .072A CCS. Two secondaries are provided: S1 delivers 19.8 VAC at 0.050A CCS for 4% feedback, and S2 is 495 VCT at .065A AC and .130A DC. These values follow the original modulation transformer design from the Peter W. Dahl files.
PWDM13007 is wound on an EI-087 x 1 lamination core in Style 1 of the series style sheet. The approximate weight is 2 lbs, matching the part page shipping weight of 2 lbs (0.91 kg). It is marked REACH compliant and RoHS compliant, and is identified by UPC 623980298313 and UNSPSC 39121301.
Like other Dahl-series magnetics, it is usually built to order one at a time. The series recommends confirming availability by phone or e-mail; stock units can usually be shipped next business day.
Ideal For
- Johnson Viking Ranger II AM restoration
- Modulation transformer replacement
- Push-pull 7027A modulator builds
- Vintage AM transmitter repair
Overview
| Series | Peter W Dahl Transformers (PWDAHL Series) |
| Part Number | PWDM13007 |
| Product Type | Modulation Transformer |
| Series Focus | Magnetics for Amateur Radio Products |
| Short Description | PETER DAHL MODULATION TX. |
| Original Part Reference | SNC P/N P2429, T2 |
| Ordering Table Description | JOHNSON VIKING RANGER II MOD SNC P/N P2429, T2, PP 7027A'S, 32 WATTS |
Electrical
| Power | 32 Watts |
| Primary | 10600 OHM PP, 695 VCT @ .072A CCS |
| Secondary | S1) 19.8 VAC @ 0.050A CCS (4% FEEDBACK) S2) 495 VCT @ .065A AC & .130A DC |
| Modulator Tubes | PP 7027A's |
Identifiers
| UPC | 623980298313 |
| UNSPSC | 39121301 |
Packaging & Shipping
| Shipping Weight | 2 lbs (0.91 kg) |
| Approx. Weight (Ordering Table) | 2 lbs |
Construction & Finish
| Core | EI-087 X 1 |
| Style (Per Series Style Sheet) | 1 |
Compliance & Certifications
| RoHS Compliant | Yes |
| REACH Compliant | Yes |
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Frequently Asked Questions
Which transmitter is PWDM13007 for?▾
The Johnson Viking Ranger II; it corresponds to SNC P/N P2429, reference T2.
What tubes does it match?▾
Push-pull 7027A's at 32 watts, with a 10600 ohm PP primary.
What are the secondary windings?▾
S1 is 19.8 VAC at 0.050A CCS (4% feedback) and S2 is 495 VCT at .065A AC and .130A DC.
How big and heavy is it?▾
It uses an EI-087 x 1 core, Style 1, and weighs about 2 lbs (0.91 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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