Hammond 1750C 5W 5K/8K-to-3.2Ω Single-Ended Fender Output Transformer

Best for

Evidence-matched replacement or restoration in a listed Fender single-ended tube amplifier whose exact circuit version matches one of Hammond's references and whose output stage, 3.2-ohm load, 5 W requirement and chassis match the 1750C drawing.

Who should skip

Skip it for push-pull amplifiers, non-3.2-ohm speaker loads, circuits exceeding 5 W or 50 mA primary DC, unmatched chassis or mounting, or any installation without qualified high-voltage service.

Watchouts

Tube amplifiers can retain lethal voltage after power is disconnected. A qualified technician must safely discharge capacitors and verify the circuit. The current catalog title's 7K primary is unsupported; Hammond specifies selectable 5,000/8,000-ohm taps. Never connect both taps as interchangeable without following the exact circuit design.

Likely add-ons

• qualified tube-amplifier technician and high-voltage-safe service equipment
• application-appropriate mounting hardware; confirm inclusion and chassis fit
• single-ended circuit configured for the documented 5,000- or 8,000-ohm primary tap and a 3.2-ohm speaker load

Verify before buying

• Does the exact amplifier model, original part number and circuit version match Hammond's 1750C cross-reference?
• Does the circuit require the 5,000- or 8,000-ohm primary tap, a 3.2-ohm secondary, no more than 5 W and no more than 50 mA primary DC?
• Do the 2.375-inch drawing dimension, 0.187-inch mounting holes and minimum 9-inch leads match the chassis?
• Is a qualified technician equipped for lethal-voltage tube-amplifier service performing the installation?