TUBE POWER TRANSFORMERS
MPS Power Transformer designs were developed over the course of 2 years of development, testing and production prototype runs. They are intended to offer the hobbyist a flexible and powerful platform to continue to push the envelope of DIY amplifier designs. Different mounting options are available to aid in flexibility of use. We've gone for a zinc plated case to keep it simple and shiny, but you could easily disassemble, paint and/or chrome these for you next project.
Initially, we've targeted the lower power 5W to 22W circuits most commonly found on DIY webpages and forums. I'd like to continue to develop and expand the offerings if these products are well received by the DIY community.
POWER TRANSFORMER OFFERINGS
Order As DESCRIPTION LIST
| PT275.2 | 275-0-55-275 Centertapped Output 100mADC, 115 or 120Vac in, (1) 6.3V x 3A, (1) Combo 5A/6.3Vac x 2A filament winding, Steel Vertical Case, X-Mount (Zinc Plated finish) | $39.95 |
| PT275.2i | 275-0-55-275 Centertapped Output 100mADC, 220 or 240Vac in, (1) 6.3V x 3A, (1) Combo 5A/6.3Vac x 2A filament winding, Steel Vertical Case, X-Mount (Zinc Plated finish) | $39.95 |
| PT325.2 | 325-0-55-325 Centertapped Output 100mADC, 115 or 120Vac in, (1) 6.3V x 3A, (1) Combo 5A/6.3Vac x 2A filament winding, Steel Vertical Case, X-Mount (Zinc Plated finish) | $39.95 |
| PT325.2i | 325-0-55-325 Centertapped Output 100mADC, 220 or 240Vac in, (1) 6.3V x 3A, (1) Combo 5A/6.3Vac x 2A filament winding, Steel Vertical Case, X-Mount (Zinc Plated finish) | $39.95 Direct |
| Option | A non-Laydown Horizontal low profile Zinc Plated Case is available. Email for details | $2/XFMR |
| Custom Paint | Black Chrome, Chrome, Black and Gray Powder are available | $3/Pair |
| Prototypes | See sales page for current offerings | |
| Custom PT | E-Mail for Quotations |
See Sales Information page for Purchase Details
SCHEMATIC
PT275.2i and PT325.2i versions have inputs as follows:
#1 BLK-common, #2 BLU-220Vac, #3 BRN-240Vac
PT275.2 & PT325.2 key flexibilities:
1. You can drive two 6.3Vac heater circuits or (1) 6.3 and (1) 5Vac.
2. 120Vac line into the PT275.2 "115Vac" tap will get you 285-0-285v operation
3. It has the "Fender" type, class AB bias supply tap at 55vac
DIMENSIONS
2 pc ZINC Plated Steel Case shields the PowerTransformer.
Lead wires are minimum 6" length.
Mounting Footprint (Vertical): 2.0" Wide x 2.25" Deep
Overall Size: 2.5"W x 3.0"H x 3.5"D
SPECIFICATIONS
- EI100 Hi Perm 29M6 lamination in 1.4" Stack
- Segmented Plastic bobbin isolates Mains from all Secondaries
- Zinc Plated Steel Case (USA)
- UL1015 style lead wire
- 550Vac operating, 1000Vac HiPot rated/tested.
- Stainless Steel hardware
- Military grade lead dress and assembly
- Built in Asia using classic techniques
- Lower DCR than competitive Xfmrs
PT275.2 Black Satin Powder covers, fully mounted case:
IMPORTANT: High Voltage devices, such as these Power Transformer's operate at lethal voltages and currents and are intended for use only by qualified Electronic Technicians, Tradepeople or Engineer's following sound practice.
WARNING!