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: (RMS) 2 X 38w/8 ohms
Frequency response: 10Hz/60kHz
Output Impedance: 8 ohms
Damping factor: 45
Total Harmonic output: 0,08%/8 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
Wholesale Electronics.Inc (NTE)
| 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 |