Hammond PWDM13041 Collins KW-1 Audio Driver Transformer T-404
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224-955-1644Key Features
- Collins KW-1 audio driver transformer, T-404
- PP 6B4G plates to PP 810 grids
- Primary 375 VCT at 0.1A CCS, 5000 ohms P-P CT
- Two secondaries, each 125 VAC at 0.1A CCS, 2225 ohms G-G CT
- EI-100 x 1 core, Style 5, approx. 2 lbs
- REACH and RoHS compliant
The PWDM13041 is the audio driver transformer for the Collins KW-1, reference T-404 in the Dahl ordering table. It couples push-pull 6B4G driver plates to the grids of the push-pull 810 modulators, and is intended for owners and restorers rebuilding the KW-1 audio chain.
The primary is 375 VCT at 0.1A CCS, presenting 5000 ohms plate-to-plate with a center tap. Two identical secondaries are provided: S1 and S2 are each 125 VAC at 0.1A CCS, each at 2225 ohms grid-to-grid with a center tap.
It is built on an EI-100 x 1 lamination core in Style 5 of the series style sheet. The approximate weight is 2 lbs, and the part page shipping weight is 2 lbs (0.91 kg). PWDM13041 is marked REACH compliant and RoHS compliant, with UPC 623980240237 and UNSPSC 39121301.
It pairs naturally with the KW-1 parts elsewhere in the Dahl listing. Like the rest of the series, it is usually built to order one at a time, and the series advises confirming availability by phone or e-mail. Stock units can usually be shipped next business day.
Ideal For
- Collins KW-1 audio driver repair
- 6B4G to 810 driver stage
- Vintage AM transmitter restoration
Overview
| Series | Peter W Dahl Transformers (PWDAHL Series) |
| Part Number | PWDM13041 |
| Product Type | Audio Driver Transformer |
| Series Focus | Magnetics for Amateur Radio Products |
| Short Description | COLLINS KW-1 AUDIO DRIVER |
| Reference Designator | T-404 |
| Ordering Table Description | COLLINS KW-1 AUDIO DRIVER PP 6B4G PLATES TO PP 810 GRIDS (T-404) |
Electrical
| Primary | 375 VCT @ 0.1A CCS (5000 OHMS P-P CT) |
| Secondary | S1) 125 VAC @ 0.1A CCS (2225 OHMS G-G CT) S2) 125 VAC @ 0.1A CCS (2225 OHMS G-G CT) |
| Driver / Driven Tubes | PP 6B4G plates to PP 810 grids |
Identifiers
| UPC | 623980240237 |
| UNSPSC | 39121301 |
Packaging & Shipping
| Shipping Weight | 2 lbs (0.91 kg) |
| Approx. Weight (Ordering Table) | 2 lbs |
Construction & Finish
| Core | EI-100 X 1 |
| Style (Per Series Style Sheet) | 5 |
Compliance & Certifications
| RoHS Compliant | Yes |
| REACH Compliant | Yes |
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Frequently Asked Questions
What does PWDM13041 replace?▾
The Collins KW-1 audio driver transformer, T-404.
What are the impedances?▾
5000 ohms P-P CT on the primary and 2225 ohms G-G CT on each of the two secondaries.
What are the voltage and current ratings?▾
Primary 375 VCT at 0.1A CCS; each secondary 125 VAC at 0.1A CCS.
What core is used?▾
EI-100 x 1, Style 5; approx. 2 lbs.
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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