Marantz 2238B Receiver (1978-1980)
Service Manual TECHNICAL SPECIFICATIONS
In 1978, a new generation of Marantz stereo receivers was born with more features, more performance than ever. The 2238B model that was here, was built to the same standards of excellence. So no no matter which one you buy, you get the same technical expertise, the one that made Marantz the name the most respected in high fidelity matters.
Tuner:
Tuning range FM: 88 to 108 Mhz
Sensitivity IHF: 1.9 µv
Selectivity: > 70 dB
Stereo Separation: > 45 dB - 1Khz
Tuning range AM: 535 to 1605 Khz
Amplifier:
Power output:
Continuous Power (RMS) 2 X 38 watts / 8 ohms
Continuous Power (RMS) 2 X 48 watts / 4 ohms
Power Band: 20Hz to 20Khz / 8 ohms
Frequency response: 10Hz to 60kHz +/- 1.25 dB
Output Impedance: 8 ohms
Damping factor: 45
Distortion:
Total Harmonic at rated output: 0,08% / 8 ohms
Total Harmonic at rated output: 0,1% / 4 ohms
Input Sensitivity Phono: 1.8 mV
Input Sensitivity Tuner: 180 mV
Input Sensitivity Aux: 180 mV
Input Sensitivity Tape In: 180 mV
Signal to Noise Ratio Phono: 76 dB
Signal to Noise Ratio Tuner: 90 dB
Signal to Noise Ratio/Tape In: 90 dB
Signal to Noise Ratio Aux: 90 dB
Dimensions: 440 x 137 x 362mm
Weight: 12.5 Kg
| Transistors | Equiv | Other |
| 2SC1681 | BC184L-2N5210 | NTE199 |
| 2SA841 | BC214L-2N3496 | NTE234 |
| 2SC1342 | BF185-2N4923 | NTE229 |
| 2SC1318 | BCW36-2N4410 | NTE128 |
| 3SK45B | BF981 | NTE222 |
| 2SA750 | BC640-2N5416 | NTE234 |
| 2SA794 | BD140-2N5415S | NTE374 |
| 2SC945 | BC182L-2N3710 | NTE123AP |
| 2SC733 | BC182L-2N3710 | NTE199 |
| 2SD330 | BD533-2N6099 | NTE152 |
| 2SC535 |
BFY90-2N2857 | NTE107 |
| HA1197 | NTE1214 | |
| 2SC1327 | BC182L-2N5210 | NTE199 |
| 2SC1344E | BC109-2N5210 | NTE199 |
| 2SC1885 | NTE399 | |
| 2SC1567 | BF457-2N5100 | NTE373 |
| 2SD388 | BDX51-2N4348 | NTE87 |
| 2SB541 | BDX96-2N6030 | NTE281 |
| Capacitors µf | Volts | Quantity (73) |
| 10.000 | 50 |
2 |
| 1000 | 16 | 1 |
| 470 | 63 | 1 |
| 220 | 50 | 1 |
| 220 | 35 | 1 |
| 220 | 10 | 1 |
| 100 | 63 | 1 |
| 100 | 50 | 2 |
| 100 | 16 | 6 |
| 47 | 50 | 2 |
| 47 | 16 | 5 |
| 47 | 10 |
1 |
| 33 | 50 | 1 |
| 22 | 16 | 2 |
| 22 | 6.3 | 2 |
| 10 | 50 | 1 |
| 10 | 35 | 3 |
| 10 | 16 | 6 |
| 4.7 | 35 | 3 |
| 4.7 | 25 | 5 |
| 3.3 | 50 | 2 |
| 3.3 | 25 | 3 |
| 2.2 | 50 |
2 |
| 2.2 | 35 | 2 |
| 2.2 | 25 | 2 |
| 1 | 50 | 9 |
| 0.47 | 50 | 3 |
| 0.22 | 50 | 3 |
