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General| Type | Preamplifier |
|---|---|
| Total harmonic distortion | 0.03% |
| Frequency response | 10Hz - 50kHz (±0.5dB) |
| Gain (MM) | 60dB |
| Gain (line) | 20dB |
| Signal to noise ratio (MM) | 80dB |
| Output (max) | 10V |
Details the performance characteristics of the 4000 Series Two Preamplifier.
Describes the dual tracking regulated power supply for ICs and transistors.
Details the RIAA equalization amplifier using ICs Z1 and Z2.
Explains the log amplifier as a compression amplifier for the autocorrelator.
Tests main outputs and volume control tracking for channel balance.
Guides on diagnosing and fixing power supply issues.
Troubleshooting steps for tape dub, copy, and selector circuits.
Diagnosing issues with no signal or volume control mistracking.
Troubleshooting stereo/mono switching and channel separation problems.
Guides for diagnosing peak unlimit circuit failures.
Troubleshooting procedures for correlator gate issues.
Diagnosing insufficient output or headphone circuit issues.
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