Hammond 1750V 30W Vox AC30 Vintage Output Transformer, 8/16 Ohm
Ships from and sold by A5 IT
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Create Free Business AccountKey Features
- Drop-in replacement for VOX AC30 Vintage output transformer (P-TVO30V)
- 4,000 ohm C.T. primary with 8 ohm and 16 ohm secondary taps
- 30 W push-pull rating, paper wound
- Frequency response 70 Hz - 15 kHz (0/-1 dB); distortion under 2% at 70 Hz
- Open style with 12.0 in minimum leads
- 2000 VRMS dielectric strength; RoHS and REACH compliant
The 1750V is a 30 watt push-pull output transformer for tube guitar amplifiers, designed as a drop-in replacement for original units such as the one in the VOX AC30 Vintage (P-TVO30V). Amp model names are for reference only, and the manufacturer states it is not affiliated with the amplifier companies.
It has a 4,000 ohm centre-tapped primary, with yellow and white outer leads and a red centre tap, plus 8 ohm (green) and 16 ohm (blue) secondary taps from a black common. Typical DC resistance is 70.37 ohms yellow-red and 70.30 ohms red-white on the primary, and 0.720 ohm black-blue on the secondary.
At 1.0 kHz, 1.0 V open circuit, the yellow-white primary measures 6.30 H (40K ohm), with 19.66 mH (132.95 ohm) black-green and 35.32 mH (233.50 ohm) black-blue on the secondary. Primary leakage inductance is 5.14 mH. Frequency response is 70 Hz to 15 kHz (0/-1 dB reference @ 1 kHz) and distortion is under 2% at 70 Hz.
This paper-wound, open-style unit has 12.0 in minimum leads. Drawing dimensions are A 3.125 in, B 3.325 in, C 3.780 in, D 2.500 in and E 2.438 in, with G 0.188 x 0.406 in. Ratings are 2000 VRMS dielectric strength and -40 to 105 degC. It is RoHS and REACH compliant and ships at 4 lbs (1.81 kg).
Ideal For
- VOX AC30 Vintage output transformer replacement
- 30 W push-pull tube amp restoration
- 8 or 16 ohm speaker matching
- Vintage-style AC30 builds
Overview
| Output Power | 30 W |
| Product Type | Tube guitar amplifier output transformer |
| Amplifier Type | Push-Pull |
| Original Amp Mfr | Vox |
Dimensions
| Dimension A | 3.125 in ±0.063 |
| Dimension B | 3.325 in ±0.125 |
| Dimension C | 3.780 in ±0.063 |
| Dimension D | 2.500 in ±0.063 |
| Dimension E | 2.438 in ±0.063 |
| Dimension G | 0.188 in x 0.406 in ±0.015 |
Electrical
| Distortion | Less than 2% @ 70 Hz |
| Test Reference | All graphs input level 27dBu @ 1.0 kHz reference |
| Tolerance Note | Results are typical and subject to normal manufacturing and electrical tolerances |
| Primary Impedance | 4,000 ohms C.T. |
| Temperature Range | -40 to 105 degC |
| Frequency Response | 70 Hz - 15 kHz (0/-1 dB reference @ 1 kHz) |
| Dielectric Strength | 2000 VRMS |
| Secondary Impedance | 8, 16 ohms |
| DCR Primary Red-White | 70.30 ohms |
| DCR Primary Yellow-Red | 70.37 ohms |
| DCR Secondary Black-Blue | 0.720 ohm |
| Inductance Primary Yellow-White (@ 1.0 KHz, 1.0 V OC) | 6.30 H / 40K ohm impedance |
| Inductance Secondary Black-Blue (@ 1.0 KHz, 1.0 V OC) | 35.32 mH / 233.50 ohm impedance |
| Inductance Secondary Black-Green (@ 1.0 KHz, 1.0 V OC) | 19.66 mH / 132.95 ohm impedance |
| Leakage Inductance Primary Yellow-White (@ 1.0 KHz, 1.0 V SC) | 5.14 mH |
Identifiers
| UPC | 623980094328 |
| UNSPSC | 39121301 |
| Part Number | 1750V |
| Short Description | OUTPUT FOR AC30 VINTAGE, VOX |
Replacement Fitment
| Amp Model Name(s) (Ref. Only) | AC30 Vintage |
| Original Unit Reference (Drawing) | P-TVO30V |
Packaging & Shipping
| Shipping Weight | 4 lbs (1.81 kg) |
Construction & Finish
| Style | Open style |
| Lead Length | 12.0 in minimum (all leads) |
| Winding Type | Paper |
| Primary Leads | Yellow, Red (C.T.), White |
| Secondary Leads | Black (common), Green (8 ohms), Blue (16 ohms) |
Compliance & Certifications
| RoHS Compliant | Yes |
| REACH Compliant | Yes |
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Frequently Asked Questions
Which VOX amplifier is the 1750V for?▾
The AC30 Vintage (original unit P-TVO30V); model names are for reference only.
Is the 1750V paper or bobbin wound?▾
Paper wound. The bobbin-wound 1750T is listed for the AC30 Reissue.
What speaker taps are provided?▾
8 ohm (green) and 16 ohm (blue), with a black common.
What is the distortion specification?▾
Less than 2% at 70 Hz.
How long are the leads?▾
12.0 in minimum.
