Hammond 1760W 100W Output Transformer for Twin Reverb and Showman
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Create Free Business AccountKey Features
- 100 W push-pull output transformer, 2,000 ohm C.T. primary
- 4, 8 and 16 ohm secondaries
- For Fender Twin Reverb, Showman, Bassman 100, Quad Reverb 100, Super Six Reverb 100
- Similar to Fender P/Ns 125A29A, 022689, 022889, 022899, 037612
- Paper wound
- Frequency response 70Hz - 15KHz (0/-1dB), distortion under 1% at 70Hz
- 2000VRMS dielectric strength, -40 to 105 degC
- RoHS and REACH compliant
The 1760W is a 100 watt push-pull output transformer for tube guitar amplifiers, listed for the Fender Bassman 100, Quad Reverb 100, Showman, Super Six Reverb 100, Twin Reverb and Twin Reverb 65 Reissue. It is similar to Fender part numbers 125A29A, 022689, 022889, 022899 and 037612, and serves as a drop in replacement for technicians maintaining high-power Fender amplifiers.
It is paper wound with a 2,000 ohm center-tapped primary and 4, 8 and 16 ohm secondaries. Typical frequency response is 70Hz to 15KHz (0/-1dB referenced at 1KHz), with distortion under 1% at 70Hz. DC resistance is 13.24 ohm (primary brown-red), 14.44 ohm (primary red-blue), 0.110 ohm (black-white), 0.175 ohm (black-green) and 0.279 ohm (black-yellow). At 1.0 kHz, 1.0 V the primary measures 4.55 H (30.4 K ohm) and the secondaries 11.46 mH (221.4 ohm), 23.64 mH (421.5 ohm) and 49.44 mH (786.2 ohm). Primary leakage inductance is 1.280 mH.
Dielectric strength is 2000VRMS and the temperature range is -40 to 105 degC. The open style unit has all leads at least 9.0 in out. Primary leads are blue, red (center tap) and brown; on the secondary, black is common, white is 4 ohm, green is 8 ohm and yellow is 16 ohm.
Drawing dimensions are A 4.063 in, B 3.465 in, C 3.500 in, D 3.500 in, E 2.250 in and F 2.790 in, with 0.187 x 0.300 in slots. Shipping weight is 4 lbs (1.81 kg). The 1760W is RoHS and REACH compliant.
Ideal For
- Replacing the output transformer in a Fender Twin Reverb
- Showman and Bassman 100 repair
- Quad Reverb 100 and Super Six Reverb 100 service
- 100 W push-pull tube amp builds needing 4, 8 or 16 ohm outputs
Overview
| Series | 1750 Series (Tube Guitar Amplifier - Output Transformers) |
| Product Type | Tube guitar amplifier output transformer |
| Manufacturer Description | Output transformer, guitar amp, 2,000 C.T. ohm pri., 4, 8, 16 ohm sec., 100W |
| Manufacturer Short Description | OUTPUT 100W FENDER 4,8,16 OHM |
Dimensions
| Dimension A | 4.063 in ±0.063 |
| Dimension B | 3.465 in ±0.125 |
| Dimension C | 3.500 in ±0.063 |
| Dimension D | 3.500 in ±0.063 |
| Dimension E | 2.250 in ±0.063 |
| Dimension F | 2.790 in ±0.063 |
| Mounting Slot G | 0.187 in x 0.300 in ±0.015 |
Electrical
| Distortion | Less than 1% @ 70Hz |
| Power Rating | 100 W |
| Primary Leads | BLU, RED (2000 C.T.), BRN |
| Amplifier Type | Push-Pull |
| Primary Impedance | 2,000 ohms C.T. |
| Frequency Response | 70Hz - 15KHz (0/-1dB reference @ 1KHz) |
| Dielectric Strength | 2000VRMS |
| Secondary Impedance | 4, 8, 16 ohms |
| DCR Primary Red-Blue | 14.44 ohm |
| DCR Primary Brown-Red | 13.24 ohm |
| DCR Secondary Black-Green | 0.175 ohm |
| DCR Secondary Black-White | 0.110 ohm |
| DCR Secondary Black-Yellow | 0.279 ohm |
| Inductance / Impedance Secondary Black-Green | 23.64 mH / 421.5 ohm |
| Inductance / Impedance Secondary Black-White | 11.46 mH / 221.4 ohm |
| Inductance / Impedance Secondary Black-Yellow | 49.44 mH / 786.2 ohm |
| Leakage Inductance Primary Brown-Blue (@ 1.0 KHz, 1.0 V SC) | 1.280 mH |
| Inductance / Impedance Primary Brown-Blue (@ 1.0 KHz, 1.0 V OC) | 4.55 H / 30.4 K ohm |
Identifiers
| UPC | 623980252544 |
| UNSPSC | 39121301 |
Compatibility
| Fender Amps (Ref.) | Bassman 100*, Quad Reverb 100*, Showman*, Super Six Reverb 100*, Twin Reverb*, Twin Reverb 65 Reissue* |
| Original Amp Manufacturer | Fender |
| Similar Fender P/N (Ref.) | 125A29A, 022689, 022889, 022899, 037612 |
Packaging & Shipping
| Shipping Weight | 4 lbs (1.81 kg) |
Construction & Finish
| Leads | All leads 9.0 in out minimum |
| Style | Open style |
| Appearance | Constructed to look similar to original factory units (where possible) |
| Winding Type | Paper |
| Design Intent | Designed for drop in replacement of original units |
| Materials & Design | Material used and design specifications kept as close as possible to the original part to preserve the stock "tone" |
Environmental & Protection
| Temperature Range | -40 to 105 degC |
Compliance & Certifications
| RoHS Compliant | Yes |
| REACH Compliant | Yes |
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Frequently Asked Questions
Does the 1760W fit a Twin Reverb?▾
Yes, the series table lists the Twin Reverb and Twin Reverb 65 Reissue along with the Bassman 100, Quad Reverb 100, Showman and Super Six Reverb 100.
How does the 1760W differ from the 1750W and 1750WA?▾
Per the series table, the 1750W is paper wound with a 4 ohm secondary and the 1750WA is bobbin wound with 2, 4 and 8 ohm secondaries; the 1760W is paper wound with 4, 8 and 16 ohm secondaries. All are 100 W with a 2,000 ohm C.T. primary.
Which lead is the 16 ohm tap?▾
Yellow is 16 ohm, green 8 ohm, white 4 ohm and black common.
What is the primary impedance?▾
2,000 ohms center-tapped.
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