Pre-Amplifier with remote control receiver
1981
The RP300 is the heart of the T300, Telefunken's high-end stereo system of the 1981 generation. In addition to the preamp-typical tasks of signal switching, sound controls, and driving the main amp, it also includes a remote control receiver that lets you operate volume, balance, sound control, and input selection conveniently from your couch. But this is not enough: it also decodes the control signals for the cassette deck, turntable, and tuner, meaning that you can also control all signal sources with the same remote control transmitter. TO accomplish this, the RP300 includes three DIN8 sockets that are connected to the other components wit cables, in addition to the signal cables. In 1981, this was quite an economic solution when microelectronics were still somewhat expensive. Placing the necessary decoder logic only once into one component made sense.
To put the icing on the cake, the RP300 contains 4 switched AC outlets, so you can turn the whole tower on and off via the RP300.
Remote control outputs for turntable/tuner/cassette deck, sound control for bass/mid/treble, 4 switched mains outlets for other components.
Magnetic Phono/Aux/Monitor (DIN and Cinch), Tuner/Tape (DIN only), Output for Power Amp (DIN), Remote Control Outputs for Tuner/Tape/Turntable, switched Mains Outlets for Tapr
(taken from the service manual)
| Rated Input Voltage: | 200 mV/470 kOhm/28 dB on tape |
| 200 mV/470 kOhm/28 dB on aux. | |
| 200 mV/470 kOhm/28 dB on tuner | |
| 2 mV/47 kOhm/28 dB on PU | |
| 190 mV/470 kOhm/27 dB on monitor | |
| Distortion Factor: | <0.02 % |
| Intermodulation Factor: | <0.1 % |
| Cross talk dampening | |
| between channels: | >60 dB at 1 kHz |
| >40 dB at 10 kHz | |
| between inputs: | >51 dB at 10 kHz |
| Transmission Range: | <10 Hz ... 60 kHz +/- 1.5 dB |
| Turntable deemphasis: | 3180/318/75 µs, DIN 45 547 |
| Output Impedance: | 3 kOhm at output socket |
| Control: | Balance: 0 dB to -17 dB |
| Treble: +/-13.5 dB at 15 kHz | |
| Bass: +18/-20 dB at 40 Hz | |
| Mid Range: +/-11 dB at 2.5 kHz | |
| Components: | 49 integrated circuits |
| 36 transistors | |
| 17 LEDs | |
| 78 diodes | |
| Mains Voltage: | 220/110 V AC, 50-60 Hz |
| Fuses: | primary: 2 x T2.5 A, 1 x T500 mA |
| secondary: 2 x T500 mA | |
| Dimensions: | 435x56x350 mm |
The RP300 uses CMOS analog switches to switch among the different input sources. In one of my RP300's, the switch responsible for the tuner input was shot - maybe due to excessive static discharge. The 4016/4066 switches are however quite standard. You might consider using the pin-compatible MAX4066 from Maxim. They are pin-compatible variants of the 4066 with much better electrical characteristics.
(taken from the service manual)
| Electronic Board | ||
|---|---|---|
| AF-socket, 13 fold | 309 679 951 | |
| BU311 | AF-socket, 5 pins | 309 679 953 |
| BU9902/9903/9904 | AF-socket, 8 pins | 309 679 952 |
| C304/1304 | al-el. cap 220µF/6.3V | 309 414 799 |
| C309/315/329/333/334/ | al-el. cap 4.7µF/35V | 309 410 739 |
| 343/344/361/524/527/ | ||
| 1309/1315/1329/1333/ | ||
| 1334/1343/1344/1361/ | ||
| 9909 | ||
| C310/311/316/318/319/ | al-el. cap 1µF/50V | 309 410 740 |
| 321/328/331/339/360/ | ||
| 529/531/533/921/1310/ | ||
| 1311/1316/1318/1319/ | ||
| 1321/1328/1331/1339/ | ||
| 1360 | ||
| C327/352/1327/1352 | al-el. cap 47µF/16V | 309 412 681 |
| C345/1345 | al-el. cap 4.7µF/25V | 309 410 742 |
| C501/502 | al-el. cap 220µF/25V | 309 414 694 |
| C503/504 | al-el. cap 100µF/25V | 309 413 485 |
| C511/512 | al-el. cap 100µF/16V | 309 413 521 |
| C521/522/523 | al-el. cap 470µF/40V | 309 414 810 |
| C526/528/534 | al-el. cap 1µF/50V | 309 410 743 |
| C532 | al-el. cap 1µF/50V | 309 410 734 |
| C939 | al-el. cap 10µF/35V | 309 411 718 |
| D501/502 | diode BZX55C7V5 | 309 325 089 |
| D511/9955 | diode BZX55C5V6G | 309 325 126 |
| D521/522/523/524/528/ | diode 1N4001A-G | 309 327 070 |
| 529/531 | ||
| D526/527/532/533/ | diode 1N4148-G | 339 529 034 |
| 901-904/906-909/911/ | ||
| 912/923/924/928/929/ | ||
| 941-943/1911/1912/ | ||
| 1923/1924/1928/1929/ | ||
| 1941/1942/9901/9903/ | ||
| 9904/9906-9909/ | ||
| 9911-9919/9921-9924/ | ||
| 9926-9929/9931-9934/ | ||
| 9936-9939/9941-9944/ | ||
| 9954 | ||
| FU1 | fuse T125mA | 309 627 946 |
| FU501/502 | fuse T500mA | 309 627 913 |
| FU503/504 | fuse T2.5A | 309 627 916 |
| IC301/309/317/319/ | IC HA1457 | 309 368 212 |
| 1301/1309/1317/1319 | ||
| IC302/303/304/306/ | IC SCL4016BE | 309 368 313 |
| 308/311/1311 | ||
| IC305/307/313/1313 | IC CD 4016AE | 309 368 295 |
| IC312/1312 | IC SD5002 | 309 368 314 |
| IC314/321/1314 | IC LS204C | 309 368 315 |
| IC316/318/320/1316/ | IC CD4051B | 309 368 316 |
| 1318/1320 | ||
| IC501/504 | IC LM317M | 309 368 296 |
| IC502/503 | IC LM337M | 309 368 297 |
| IC901/9906/9908 | IC MC1411CP | 309 368 317 |
| IC904 | IC ESM371 | 309 368 318 |
| IC905 | IC ESM372 | 309 368 319 |
| IC9901 | IC SAB3210 | 309 368 320 |
| IC9902 | IC SAB3271 | 309 368 321 |
| IC9902 | IC SAB3270 | 309 368 321 |
| IC9903 | IC CD4001B | 309 368 253 |
| IC9904 | IC MC14543 | 309 368 158 |
| IC9907 | IC CD4075B | 309 368 322 |
| IC9909 | IC CD4013B | 309 368 286 |
| IC9911 | IC CD4515B | 309 368 323 |
| IC9912 | IC MM74C42N | 309 368 148 |
| L301/1301 | RF choke | 309 250 947 |
| L302/1302 | filter coil | 309 249 210 |
| L9901 | coil SH-7/223 | 309 249 207 |
| R521 | fus. res. 5.6Ohm/5%/3W | 309 580 937 |
| RG301/1301 | res. combination 1 | 309 561 921 |
| RG302/1302 | res. combination 2 | 309 561 922 |
| RG303/1303 | res. combination 3 | 309 561 923 |
| RG304/1304 | res. combination 4 | 309 561 924 |
| RG306/308/1306/1308 | res. combination 5 | 309 561 925 |
| RG307/309/1307/1309 | res. combination 6 | 309 561 926 |
| RS501/502 | relay | 309 636 942 |
| S1 | mains switch | 309 630 035 |
| S301 | pushbutton assembly 4-fold | 309 382 034 |
| S9901-9909/9911/9914/ | touch switch | 309 639 026 |
| 9915/9917/9921 | ||
| S9913/9916 | touch switch | 309 639 025 |
| ST9901 | connecting bar, 3 contacts | 309 650 953 |
| T301/1301 | transistor BC560B | 309 001 252 |
| T302/1302 | transistor BC550B | 309 001 211 |
| T303/1303 | transistor BC550C | 309 001 242 |
| T304/311/1304/1311 | transistor BF254 | 309 001 047 |
| T501/502/504/901/902/ | transistor BC548B | 309 001 293 |
| 904/906/908/909/916/ | ||
| 9901/9902/9903/9910 | ||
| T503 | transistor BC338 | 309 001 289 |
| T505/506/903/915/9904 | transistor BC558B | 309 001 291 |
| T910-914 | transistor BC558C | 309 001 292 |
| TR1 | mains transformer | 309 310 154 |
| IR Preamplifier 4 | ||
| BS50 | IR preamplifier 4 | 349 370 991 |
| C102/106 | al-el. cap 1µF/35V | 309 410 735 |
| D501 | photo diode BPN41 | 309 327 071 |
| D503 | diode BZX55B8V2 | 309 325 127 |
| IC401/402 | IC LF356N | 309 368 324 |
| L711 | touch coil | 309 249 170 |
| T451 | transistor BC239B | 309 001 012 |
| Electrical Parts | ||
| power cord with plug | 309 695 939 | |
| power socket, 4-fold | 309 675 805 | |
| control cable with conn. | 309 699 231 | |
| control cable with conn. | 309 699 232 | |
| audio cable | 309 699 233 | |
| Mechanical Parts | ||
| mains switch rod with knob | 309 921 928 | |
| guide for pushbutton, 4-fold | 309 866 993 | |
| guide for pushbutton, 1-fold | 309 866 989 | |
| guide for pushbutton, 3-fold | 309 866 990 | |
| guide for pushbutton, 4-fold | 309 866 994 | |
| holder for knob | 309 900 348 | |
| pressure spring for knob | 309 981 842 | |
| bearing support, 5-fold | 309 954 904 | |
| pull-relief | 309 900 311 | |
| IC socket, 24 pins | 309 689 916 | |
| IC socket, 28 pins | 309 689 915 | |
| supp. f. rem. ctrl. socket | 309 930 944 | |
| transformer holder | 309 900 353 | |
| plate holder | 309 900 332 | |
| plate holder | 309 900 345 | |
| plate holder | 309 900 346 | |
| fuse holder | 309 653 501 | |
| cable holder, 7-fold | 309 900 323 | |
| cable holder, 5-fold | 309 900 341 | |
| cable holder, 11-fold | 309 900 336 | |
| cable holder, 9-fold | 309 900 342 | |
| Cabinet Parts | ||
| 501 | cabinet, upper part | 309 786 054 |
| 502 | front mask | 309 833 740 |
| 503 | IR cover | 309 833 742 |
| 504 | foot, black | 309 770 932 |
| 505 | toggle switch knob | 309 809 956 |
| 506 | touch knob | 309 800 134 |
| 507 | touch knob | 309 800 136 |
| 508 | push button | 309 800 135 |
| Transmitter RF300 | ||
| transmitter complete | 349 398 058 | |
| upper cover | 309 786 051 | |
| lower cover | 309 788 992 | |
| IR window | 309 833 730 | |
| battery flap | 309 833 731 | |
| transmitter mask | 309 362 022 | |
| D9001-9004/9006-9009/ | diode 1N4148 | 309 325 927 |
| 9011-9014/9016/9017 | ||
| D9021/9022 | LED V290P | 309 327 060 |
| C9003 | al-el. cap 1000µF/10V | 309 414 602 |
| IC9001 | IC SAB3210 | 309 368 307 |
| L9001 | coil SH7/223 | 309 368 307 |
| LE 9001 | battery clip with cables | 309 669 943 |
| T9001/9002 | transistor BC548B | 339 556 087 |
| T9003 | transistor BC328 | 339 556 091 |
| Device/Chassis/BS: RP300 Canada with Transmitter RF300 | ||
| power cord with plug | 309 695 940 | |
| FU1 | fuse T250mA | 309 627 907 |
| S1 | mains switch | 309 630 040 |
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