Transformers & Chokes

Output transformer upgrade for the Fender® part numbers 125A35A, 125A3A, and 022905 as used in the:

• Bronco (AA764, AB764, Blackface, Silverface)
• Champ (Tweed, 5C1, 5E1, 5F1, AA764, Blackface, Silverface, Vibro Blackface)
• Harvard (6G10)
• Princeton (Tweed, 5B2, 5C2, 5D2, 5E2, 5F2, 5F2A)

This upgraded transformer features both 4 ohm and 8 ohm taps on the secondary. The primary has two impedance options for lower voltage (5K) and higher voltage (8k) models.

• Designed for general purpose or replacement use in push-pull tube output circuits. (For single ended use, see our 125 SE series - optimized for single ended tube output circuits).
• Frequency response: 150 Hz. - 15 Khz (± 1db max. ref. 1 Khz).
• Open style with minimum 5" long primary leads, secondary solder lugs for convenient secondary connections.
• Tables provided with transformer listing 90 pre-calculated impedance ratios.

• Designed for general purpose or replacement use (not Hi-Fi), in single ended, tube output circuits.
• Frequency response: 100 Hz. - 15 Khz (± 1db max. - ref. 1 Khz). (For full frequency response (20 Hz. to 20 Khz.) - see P-T1627SE).
• For push-pull output use, see P-T125A - optimized for push-pull tube output circuits.
• Open style with minimum 12" long primary & secondary leads leads.
• All sizes use butt stacked cores (using 29M6 steel) with an air gap, to reduce D.C. core saturation.
• Primary impedance range from 2,500 to 10,000 Ohms.
• Secondary impedance range from 4 to 32 Ohms.

Part No.
Audio Power
Max D.C. Bias
Dimensions (Inches)


A
B
C
D
E
G Mtg.

• Over designed for single ended tube output circuits (triode, tetrode or pentode tubes).
• Enclosed (shielded), 4 slot, above chassis Type 'X' mounting.
• Frequency response at least 20 Hz. to 20 Khz. at full rated power (± 1 db max. ref.