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.
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.
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.
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.
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.
Line bridging or output transformer. Features include PCB mount low profile encapsulated; Electrostatic and flux screens. Further details in table below.
Line input transformer. Features include PCB mount miniature; Max power: 2mW. Further details in table below.
Line input transformer. Features include PCB mount miniature encapsulated; Return loss: >19dB 300-3400Hz. Further details in table below.
Specifications