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3 December 2024

OEP E187A TRANSFORMER Analogue audio, PCB, line input

Stock code
23-058
Brand
OEP (Oxford Electrical Products)
Model number
  • E187A
OEP E187A TRANSFORMER Analogue audio, PCB, line input
OEP E187A TRANSFORMER Analogue audio, PCB, line input

Order

VAT / Delivery
$11.52
each (ex. VAT)
10+ $11.17
50+ $10.94
100+ $10.71
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RoHS Compliant

OEP AUDIO TRANSFORMERS

A range of economically priced PCB mounting transformers, manufactured by OEP in England. A262 types and Z3003E are supplied without screening cans, these are available as an optional extra. Z218 series have fitted mu-metal screening cans, while Z1604 and E187A are unscreened.
Full data and application notes for each type are available from the OEP website at www.oep.co.uk or from Canford Technical Support.

Z21805C

Suitable for microphone input stages optimised for low source impedances (500-1000 ohms), typical of low Rbb bipolar transistors and operational amplifiers such as the LT1208. It can also be used for line level inputs when used in current mode active input circuits. Turns ratio 1:2 tapped at 0.5. Dimensions: 19.5(l) x 16.0(w) x 14.95 (h. above PCB) mm.

Z21806C

Suitable for line level input stages using the current mode or ‘zero field’ technique. This removes most of the artefacts normally associated with audio transformers whilst retaining the desirable galvanic isolation RFI blocking. Turns ratio 1:1. Dimensions: 19.5(l) x 16.0(w) x 14.95 (h. above PCB) mm.

Z21807C

Suitable for line level input stages (10k – 20k ohm bridging). Turns ratio 1:0.5+0.5. Dimensions: 19.5(l) x 16.0(w) x 14.95 (h. above PCB) mm.

Z21808C

Suitable for microphone input stages optimised for medium source impedances (c. 5k ohms), typical of medium Rbb bipolar transistors and operational amplifiers such as the NE5534. It can also be used for line level inputs when used in current mode active input circuits. Turns ratio 1:6 tapped at 1:1.8. Dimensions: 19.5(l) x 16.0(w) x 14.95 (h. above PCB) mm.

A262A7E, A262A3E, A262A2E

General purpose audio transformers. Features include PCB mount miniature high performance; Interwinding foil screen; Max power: 100mW @ 300Hz, 2.5mW @ 50Hz; Mu-metal screening is available as an accessory. Further details in table below.

Z3003E

Line bridging or output transformer. Features include PCB mount low profile encapsulated; Electrostatic and flux screens. Further details in table below.

E187A

Line input transformer. Features include PCB mount miniature; Max power: 2mW. Further details in table below.

Z1604

Line input transformer. Features include PCB mount miniature encapsulated; Return loss: >19dB 300-3400Hz. Further details in table below.

Specifications

A262A7E A262A3E A262A2E Z3003E E187A Z1604
Type General purpose audio Line bridging or output Line level input Line level input
Dimensions: 28 x 23 x 22 28 x 23 x 22 28 x 23 x 22 32 x 27 x 15 19 x 16 x 16 18 x 18 x 15
(L x W x H) mm
Turns Ratio: 1+1:1+1 1+1:6.45+6.45 1+1:2+2 1+1:2 1:.5+.5 1:.5+.5
Distortion (THD): <1% at: 100mW @ 300Hz <1% at: 100mW @ 300Hz <1% at: 100mW @ 300Hz <1% @ +20dBu <1%@ 20Hz 2mW Below saturation: <0.02%
1mW @ 30Hz 1mW @ 30Hz 1mW @ 30Hz (Primaries in series) At 2mW into 600ohms: <1% at 60 Hz
Source Impedance: 600/2k4ohms 150/600ohms 150/600ohms 2.5k/10kohms 600ohms 600ohms
Optimum Load Impedance: 600/2k4ohms 6.25k/25kohms 600/2.4kohms 10kohms 600ohms C.T. 600ohms C.T.
Frequency Response: 30Hz-35kHz ±1.5dB 30Hz-25kHz ±1.5dB 30-35kHz ±1.5dB 20Hz-20khz ±0.2dB 200Hz-15kHz 2mW: 60Hz-25kHz ±0.5dB
0.2mW: 30Hz-25kHz ±0.7dB
Balance: >70dB >60dB >70dB >60dB @ 10kHz >60dB >65dB
DC Resistance: 42ohms 10ohms 9.6ohms 870+1187ohms 69ohms 109ohms
(of each primary)
DC Resistance: 58ohms 535/605ohms 55ohms 2010ohms 97ohms 64+69ohms
(of each secondary)
Isolation: 1kV 1kV 1kV 1500V DC 500V DC >1.5kV
(between windings)
Applications: Input, output and interstage High impedance bridging Low level line Low level line