Transformers & Chokes

P-T156 Transformer - Audio Interstage, 10 mA
Equivalent to Stancor A53-C. 1:3 ratio overall. Center tapped secondary may be used for push-pull grids.Specifications Max. Primary Current: 10 mA Impedance Primary to Secondary (Ohms): 10,000 to 90,000 Mounting centers: 2" Weight: 0.4 lbs.
$16.95
P-T119DA Transformer - Hammond, Audio Interstage, 12 Watt
Developed in response to requests from the Collins Collectors Association"this is a matching audio transformer for older equipment with 600 ohm audio outputdriving modern speakers. Or for "classic" high impedance speakers used with newer equipmentsimply swap primary for secondary (ie...4 or 8 ohm input and 600 ohms out). Key Features Isolation unit: (i.e.
$30.16
P-T124E Transformer - Hammond, Audio Interstage, 15K PRI, 33.8/135K S
  • Designed for general purpose or replacement use in single ended or phase inverter tube driver circuits.
  • Open style 2 point mount with minimum 5" long primary leads.
  • Core material is Grain Oriented Silicon Steel.
  • Operates in the 150 Hz - 15 KHz range.

Specifications
Primary Impedance
15,000 Ω CT
Secondary Impedance (Parallel)
33,800 Ω CT
Secondary Impedance (Series)
135,000 Ω CT
Output Power
5 W
Primary DC Resistance (Blue-Red)
373 Ω
Primary DC Resistance (Red-Brown)
355 Ω
Secondary DC Resistance (Green-Black)
1,630 Ω
Secondary DC Resistance (Black
$46.65
P-T124B Transformer - Hammond, Audio Interstage, 10K PRI, 90K SEC
  • Designed for general purpose or replacement use in single ended or phase inverter tube driver circuits.
  • Open style 2 point mount with minimum 5" long primary leads.
  • Core material is 49% Nickel Steel laminations for better low end response.
  • Operates in the 150 Hz - 15 KHz range.

Specifications
Primary Impedance
10,000 Ω
Secondary Impedance
90,000 Ω CT
Output Power
5 W
Primary DC Resistance
405 Ω
Secondary DC Resistance
1,525 Ω
Primary Inductance
28 H
Secondary Inductance
108 H
Leakage Inductance
0.11 H
Primary Impedance
175 kΩ
Secondary Impedance
$48.25
P-T124D Transformer - Hammond, Audio Interstage, 7K PRI, 15.8K SEC
  • Designed for general purpose or replacement use in single ended or phase inverter tube driver circuits.
  • Open style 2 point mount with minimum 5" long primary leads.
  • Core material is Grain Oriented Silicon Steel.
  • Operates in the 150 Hz - 15 KHz range.

Specifications
Primary Impedance
7,000 Ω CT
Secondary Impedance
15,800 Ω CT
Output Power
5 W
Primary DC Resistance (Blue-Red)
218 Ω
Primary DC Resistance (Red-Brown)
236 Ω
Secondary DC Resistance (Green-Black)
297 Ω
Secondary DC Resistance (Black-Green)
394 Ω
Primary Inductance
6.45 H
Secondary Induct
$38.60
P-T126B Transformer - Hammond, Tube Driver Interstage
Special Order Item
Audio watts: 4
Impedance: 5k ohms
D.C. Resistance: 178 ohms
Inductance: 44 henries
Rated D.C. Bias Current: 30 mA
Features:
  • Designed for driver use ONLY in single ended tube output amplifiers. These units replace coupling capacitor circuits for improved sound.
  • Closed style with minimum 8" long leads.
  • All models use bifilar wound windings for exceptional coupling and bandwidth.
  • Minimum frequency response 20 Hz. - 20 Khz (± 1db max. ref. 1 Khz.).
  • The core is gapped to support the specified D.C.
$101.38
Note: special order items require additional lead time. See our page on special order items.
P-T145J Transformer - Hammond, Audio Chassis Mount Driver, 4k primary
Special Order Item
  • Application: Driver
  • Primary Impedance: 4000 ohms
  • Secondary Impedance: 600 ct
  • Primary D.C.: 8 mA
  • Primary D.C. Resistance: 340 ohms
  • Secondary D.C. Resistance: 24 ohms
  • Output: 135 mW
  • Dimensions A: 1.63
  • Dimensions B: 0.88
  • Dimensions C: 0.81
  • Dimensions D: 1.38

Features:
  • Small, economical, open, two hole horizontal bracket mount.
  • Insulated, color coded flexible leads, 4" long minimum
  • Frequency response 150 Hz. to 15 Khz. (+/- 1 db, reference 1000 Hz.)
  • When operating at impedances below nominal, power capability and the frequency spectrum are proportionately lower, conversely, at higher impedances power capability and frequency spectrum will be proportionately higher.
  • Net weight: 0.5 oz.
$21.98
Note: special order items require additional lead time. See our page on special order items.
P-T145N Transformer - Hammond, Audio Chassis Mount Driver, 10k primary
Special Order Item
  • Application: Driver
  • Primary Impedance: 10000 ohms
  • Secondary Impedance: 2000 ct
  • Primary D.C.: 5 mA
  • Primary D.C. Resistance: 700 ohms
  • Secondary D.C. Resistance: 89 ohms
  • Output: 135 mW
  • Dimensions A: 1.63
  • Dimensions B: 0.88
  • Dimensions C: 0.81
  • Dimensions D: 1.38

Features:
  • Small, economical, open, two hole horizontal bracket mount.
  • Insulated, color coded flexible leads, 4" long minimum
  • Frequency response 150 Hz. to 15 Khz.
$21.98
Note: special order items require additional lead time. See our page on special order items.
P-T850LA Transformer - Hammond, Audio Broadcast Quality
Special Order Item
Output to Line, Matching or Bridging
  • Deep-drawn steel case with tin plated finish, with two convenient 6-32 mounting studs with mounting hardware.
  • Sealed case and wax potted core internally for stable characteristics and long life.
  • Wide frequency response ± 0.5 db max. from 20 Hz. to 20 Khz. (except units over 5K ohms impedance, may be down 1 db @ 20 Khz.)
  • Insertion loss of apx. 1 db.
  • Maximum power level +15 dbm. with specified characteristics, or higher levels with reduced low frequency performance.
  • Distortion is apx. 1.5% @ 20 Hz.
$146.22
Note: special order items require additional lead time. See our page on special order items.
P-T145B Transformer - Hammond, Audio driver, 145B
Special Order Item
Audio TX driver, chassis mount.
  • Small, economical, open, two hole horizontal bracket mount.
  • Insulated, color coded flexible leads, 4" long minimum
  • Frequency response 150 Hz. to 15 Khz. (± 1 db, reference 1000 Hz.)
  • When operating at impedances below nominal, power capability and the frequency spectrum are proportionately lower, conversely, at higher impedances power capability and frequency spectrum will be proportionately higher.
  • Primary: 600 ohms
  • Secondary: 600 ohms
  • Primary D.C.: 18 mA
  • D.C. Resistance (±15%): 30 ohms primary, 38 ohms secondary
  • Output: 200 mW
$21.98
Note: special order items require additional lead time. See our page on special order items.
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