Sowter 9762 |
PACKAGE OPTIONS | Part Number | ||
| Threaded grommet Coloured Leads | 9762-E | |||
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| APPLICATION
For use with
most current out Digital-to-Analogue Converters. Works well with most current out DAS's such as AD1851, AD1852, AD1853, AD1861, AD1862 . Provides current to voltage conversion with approximately 22 dB gain.
Presents a low impedance to the DAC output for best frequency response.
Provides significant sound quality improvement when compared to other
interface methods. Ensures full isolation of digital noise in ground and
supply rails. An I/V resistor of 200 ohms is suggested but there is sufficient inductance for good quality
operation with higher values. Lower values may improve the souns but will reduce the output. Can be configured to drive 9335
attenuator without loss of bandwidth. Can be used driven from multiple
parallel DAC's to increase output level.
The I/V resistor across the secondary of the transformer instead of the primary has yeilded the best result according to some customers. The value of the resistor should be increased by the ratio squared. The table below suggests values for rexperiment. |
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| FEATURES Exceptionally large and high performance transformer. Twin secondary windings for driving differential (push-pull) amplifier. These may be used in parallel to improve the bandwidth and reduce the output impedance to 8K which is suitable for driving our type 9335 attenuator. Mumetal core for minimal harmonic distortion. Mumetal can for magnetic shielding. | ||||
| PRIMARY INDUCTANCE | 2.3 H | |||
| PRIMARY DC RESISTANCE | 6.5 Ohms approx. | |||
| SECONDARY DC RESISTANCE | 1.25k Ohms approx | |||
| RATIO | 1 : 6.4+6.4 | |||
| SUGGESTED I/V RESISTOR | Across primary |
secondaries parallel | 200 Ohms | |
| secondaries series | 100 Ohms | |||
| Across secondary | secondaries parallel | 4.2k Ohms | ||
| secondaries series | 8.2k Ohms | |||
| FREQUENCY RESPONSE (Typical) | Parallel secondary windings | +/- 1.5 dB 5 Hz to 50 kHz | ||
| Series secondary windings | +/- 1.5 dB 5 Hz to 100 kHz | |||
| E A Sowter Ltd PO Box36 IPSWICH IP1 2EL England |
Tel: +44(0)1473 252794 Fax: +44(0)1473 236188 |
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