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Richard John Torrens |
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Around 1970, the 2000 amplifier was redesigned. The redesign was available as the System 2000 Mark 2 and as the System 3000. Circuits of these were very similar! Unfortunately I do not have the details of the System 3000, only of the 2000 and a page detailing the differences. This page lists the main differences, as below - but this is partly guesswork.
I believe the circuit was printed on the reverse of the instruction card - if you have a copy, please let me know.
| Feature | System 2000 | System 3000 |
|---|---|---|
| Transformer | 20-0-20v | 25v (?) |
| Rectifier | 2 diodes | Bridge rectifier |
| C24 | 2000µ 30v | 1000µ 63v |
| Power supply | No stabilizer | Stabilised |
| S7 (Mute) | Absent | Present |
| Power neon | Absent | Present |
| SKT7 (Phones) | Absent | Present |
Document URI: http://diy.torrens.org/Electronics/2000/diffs.html