Hammond PWDM13086 Globe King 500A/B Modulation Transformer
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224-955-1644Key Features
- Modulation transformer for Globe King 500A/B
- PP 811A's to single 4-250A/4-400A RF PA
- Primary 1465 VCT at 0.246A CCS, 7400 ohms P-P
- Secondary 1275 VAC at 0.283A CCS (1800 VDC at .4A)
- EI-150 x 3.5" 29GM6X core, Style 5
- Approx. 16 lbs; REACH and RoHS compliant
The PWDM13086 is a modulation transformer for the Globe King 500A and 500B transmitters. It couples push-pull 811A modulators to a single 4-250A or 4-400A RF power amplifier, and is intended for Globe King owners and AM enthusiasts rebuilding the modulator section. The ordering table description, GLOBE KING 500A/B MOD XFMR PP 811A'S TO SINGLE 4-250A/4-400A RF PA, identifies the tube line-up it was designed around.
The primary is 1465 VCT at 0.246A CCS with a 7400 ohm plate-to-plate impedance. The secondary is 1275 VAC at 0.283A CCS, listed against a 1800 VDC at .4A RF PA supply.
It is wound on an EI-150 x 3.5" 29GM6X lamination core in Style 5 of the series style sheet. Approximate weight is 16 lbs, and the shipping weight is 16 lbs (7.26 kg). PWDM13086 is REACH compliant and RoHS compliant, with UPC 623980130866 and UNSPSC 39121301.
This design comes from the Peter W. Dahl files that make up the PWDAHL Series of magnetics for amateur radio products. These units are 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
- Globe King 500A/B restoration
- 811A modulator to 4-250A/4-400A final
- Vintage AM transmitter repair
Overview
| Series | Peter W Dahl Transformers (PWDAHL Series) |
| Part Number | PWDM13086 |
| Product Type | Modulation Transformer |
| Series Focus | Magnetics for Amateur Radio Products |
| Short Description | GLOBE KING 500A/B MODULATION |
| Ordering Table Description | GLOBE KING 500A/B MOD XFMR PP 811A'S TO SINGLE 4-250A/4-400A RF PA |
Electrical
| Primary | 1465 VCT @ 0.246A CCS (7400 OHMS P-P) |
| Secondary | 1275 VAC @ 0.283A CCS (1800 VDC @ .4A) |
| Modulator / RF Tubes | PP 811A's to single 4-250A/4-400A RF PA |
Identifiers
| UPC | 623980130866 |
| UNSPSC | 39121301 |
Packaging & Shipping
| Shipping Weight | 16 lbs (7.26 kg) |
| Approx. Weight (Ordering Table) | 16 lbs |
Construction & Finish
| Core | EI-150 X 3.5" 29GM6X |
| Style (Per Series Style Sheet) | 5 |
Compliance & Certifications
| RoHS Compliant | Yes |
| REACH Compliant | Yes |
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Frequently Asked Questions
Which transmitters use PWDM13086?▾
The Globe King 500A and 500B.
What tube line-up is it designed for?▾
Push-pull 811A modulators into a single 4-250A or 4-400A RF PA.
What are the winding ratings?▾
Primary 1465 VCT at 0.246A CCS (7400 ohms P-P); secondary 1275 VAC at 0.283A CCS (1800 VDC at .4A).
What does it weigh?▾
About 16 lbs (7.26 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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