Sowter Type 9995High bandwidth Transformer for tube microphones |
PACKAGE OPTIONS | Part Number | ||||
| Coloured Leads Threaded Grommet |
9995-I 9995-E |
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| APPLICATION For use with tube amplified condenser microphones. Tubes for this purpose (e.g. EC92, EF86, VF14 etc) have to be low power and tend to have a relatively high internal impedance typically in the range 10 to 20 k Ohms. This transformer has been optimised for this application in terms of bandwidth and phase shift. Also suitable for FET based amplifiers. | ||||||
| FEATURES Mumetal (76%Nickel) laminated core for minimal harmonic distortion and high dynamic range. Multiple interleaved windings ensuring exceptionally good bandwidth even when driven from a relatively high impedance valve.. The high bandwidth and very low phase shift ensures excellent transient response. Mumetal can for magnetic shielding. Available with 2 x M3 threaded mounting holes or threaded grommet for a small extra charge. A center tap is provided on the secondary for phantom powering. | ||||||
| RATIO | 5:1 | |||||
| PRIMARY INDUCTANCE | 750H approx | |||||
| TOTAL HARMONIC DISTORTION at 20 Hz (6 ohm source) typical | 0.05% | |||||
| FREQUENCY RESPONSE | +/- 05 dB 5 Hz to 80kHz | |||||
| NOTE The transformer has to be used in conjunction with a blocking capacitor to ensure no dc flows in the primary. | ||||||
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