Hammond PWDP13139 Alpha 76A C-Core Power Transformer, 1950 VAC
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224-955-1644Key Features
- Power transformer for Alpha 76A, 76PA, 76CA and 78 amplifiers
- S1 high voltage: 0-1200-1950 VAC @ 0.5 A CCS
- S2: 40 VCT @ 0.5 A; S3: 25 VAC @ 1 A; S4: 6.3 VAC @ 9.6 A (all CCS)
- Primary: 120/240 VAC, 60 Hz, single phase
- B-0393 C-core, style 10; approx. 23 lb
- Style 10 C-core models may need a quote from the manufacturer
The PWDP13139 is the Alpha 76A power transformer from the Peter W. Dahl design files, listed for Alpha models 76A, 76PA, 76CA and 78. It serves owners and repair technicians looking after these amateur radio linear amplifiers.
The primary is 120/240 VAC, 60 Hz, single phase. The transformer has four secondaries:
- S1: 0-1200-1950 VAC @ 0.5 A CCS (tapped high voltage)
- S2: 40 VCT @ 0.5 A CCS
- S3: 25 VAC @ 1 A CCS
- S4: 6.3 VAC @ 9.6 A CCS
It is built on a B-0393 C-core in style 10 of the series style sheet, with an approximate weight of 23 lb and a shipping weight of 23 lbs (10.43 kg). The series notes state that some Hipersil C-core models (styles 8, 9 and 10) need to be quoted by the manufacturer's office because of changing supply conditions and minimum charges from C-core suppliers, so expect to confirm pricing and availability for the PWDP13139.
The part is listed as REACH and RoHS compliant. Its primary is specified for 60 Hz only; buyers on 50 Hz supplies should note the series guidance to choose 50/60 Hz parts.
Ideal For
- Alpha 76A amplifier restoration
- Alpha 76PA and 76CA amplifier repair
- Alpha 78 linear amplifier power supply
Overview
| Series | PWDAHL Series (Peter W Dahl Transformers) |
| Fits Models | Alpha 76A, 76PA, 76CA & 78 |
| Part Number | PWDP13139 |
| Series Tagline | Magnetics for Amateur Radio Products |
| Short Description | ALPHA 76A POWER TRANSFORMER |
| Ordering Table Description | ALPHA 76A POWER TRANSFORMER FOR ALPHA MODELS 76A, 76PA, 76CA & 78 |
Dimensions
| Approx. Weight | 23 lbs |
Electrical
| Primary | 120/240 VAC 60 HZ 1 PH |
| Secondary S1 | 0-1200-1950 VAC @ 0.5A CCS |
| Secondary S2 | 40 VCT @ 0.5A CCS |
| Secondary S3 | 25 VAC @ 1A CCS |
| Secondary S4 | 6.3 VAC @ 9.6A CCS |
Identifiers
| UPC | 623980284309 |
| UNSPSC | 39121301 |
Packaging & Shipping
| Shipping Weight | 23 lbs (10.43 kg) |
Construction & Finish
| Core | B-0393/ C-CORE |
| Style (Per Series Style Sheet) | 10 |
Compliance & Certifications
| RoHS Compliant | Yes |
| REACH Compliant | Yes |
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Frequently Asked Questions
Which Alpha amplifiers use the PWDP13139?▾
It is listed for Alpha models 76A, 76PA, 76CA and 78.
What are the secondary ratings?▾
S1 0-1200-1950 VAC @ 0.5 A, S2 40 VCT @ 0.5 A, S3 25 VAC @ 1 A and S4 6.3 VAC @ 9.6 A, all CCS.
What core does it use?▾
A B-0393 C-core, in style 10 of the series style sheet.
Why might this part need a quote?▾
The series notes say some Hipersil C-core models (styles 8, 9 and 10) must be quoted by the manufacturer's office due to changing supply conditions and minimum charges from C-core suppliers.
Is it rated for 50 Hz?▾
The primary is listed as 120/240 VAC 60 Hz single phase.
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