My Telefunken Collection

RC 300

Device Type

Cassette Deck

Start of Sale

1981

General Description

The RC 300 is arguably one of the best, luxurious...and most expensive tape decks Telefunken has ever built. No tape deck before or after had a longplay option, or a three-motor mechanics. The drive mechanism is the MultiDrive mechanism that was developed by Papst, a company that is today still known for the quality of their fans. With a separate motor for the capstan and each reel, there is no need for belts or rubber rolls, all controls are done electronically and there are much fewer parts that can fail.

The RC 300 was part of Telefunken's T 300 high-end component system, and it has a remote control input that allows the drive functions to be controlled via the RP 300 pre-amplifier.

Similar to other T 300 components, the RC 300 was manufactured in Germany and its inner construction is significantly different to the RC 100 or RC 200 decks, which were manufactured in fareast. One might think that it was designed by an engineer who previously designed TV chassis - metal-framed PCBs that could be swung out for servicing were typical for TVs built in the 60s/70s.

Features

three-motor drive, two tape speeds, auto rewind/auto play, electronic tape counter with memory function, switchable MPX filter, remote control input.

Connectors

Line (DIN and Cinch), Remote Control

Technical Data

(taken from the user's manual)

Tape Speed 4.75 cm/s +/- 1.0 %

Tone Height Variations: <= +/- 0.1 % (Rec + Play)

<= +/- 0.08 % (only Play)

Frequency Range: Fe₂O₃: 30-16000 Hz

CrO₂: 30-18000 Hz

FeCr: 30-16000 Hz

Metal: 30-18000 Hz

Distortion Factor: Fe₂O₃ and FeCr: <= 1 %

CrO₂: <= 3 %

Metal: <= 2 %

Reduction of Max. High Frequency

Level at 10 kHz: Fe₂O₃: <= 12 dB

CrO₂: <= 10 dB

FeCr: <= 10 dB

Metal: <= 2 dB

S/N Ratio with High COM NR: Fe₂O₃: 74 dB

CrO₂: 78 dB

FeCr: 75 dB

Metal: 77 dB

Play Deemphasis: Fe₂O₃: 3180 µs/120 µs

CrO₂: 3180 µs/70 µs

FeCr: 3180 µs/120 µs

Metal: 3180 µs/70 µs

Tape Speed 2.4 cm/s +/- 1.5 %

Tone Height Variations: <= +/- 0.2 % (Rec + Play)

<= +/- 0.15 % (only Play)

Frequency Range, Metal: 30-12500 Hz

Distortion Factor, Metal: <= 2 %

Reduction of Max. High Frequency

Level at 10 kHz, Metal: <= 10 dB

S/N Ratio with High COM NR, Metal: 72 dB

Play Deemphasis, Metal: 3180 µs/120 µs

Tape Speed 4.75 cm/s +/- 1.0 %
Tone Height Variations:	<= +/- 0.1 % (Rec + Play)
	<= +/- 0.08 % (only Play)
Frequency Range:	Fe₂O₃: 30-16000 Hz
	CrO₂: 30-18000 Hz
	FeCr: 30-16000 Hz
	Metal: 30-18000 Hz
Distortion Factor:	Fe₂O₃ and FeCr: <= 1 %
	CrO₂: <= 3 %
	Metal: <= 2 %
Reduction of Max. High Frequency
Level at 10 kHz:	Fe₂O₃: <= 12 dB
	CrO₂: <= 10 dB
	FeCr: <= 10 dB
	Metal: <= 2 dB
S/N Ratio with High COM NR:	Fe₂O₃: 74 dB
	CrO₂: 78 dB
	FeCr: 75 dB
	Metal: 77 dB
Play Deemphasis:	Fe₂O₃: 3180 µs/120 µs
	CrO₂: 3180 µs/70 µs
	FeCr: 3180 µs/120 µs
	Metal: 3180 µs/70 µs
Tape Speed 2.4 cm/s +/- 1.5 %
Tone Height Variations:	<= +/- 0.2 % (Rec + Play)
	<= +/- 0.15 % (only Play)
Frequency Range, Metal:	30-12500 Hz
Distortion Factor, Metal:	<= 2 %
Reduction of Max. High Frequency
Level at 10 kHz, Metal:	<= 10 dB
S/N Ratio with High COM NR, Metal:	72 dB
Play Deemphasis, Metal:	3180 µs/120 µs

All data about distortion, reduction of max. high frequency level at 10 kHz, and S/N ratio are based on a tape magnetization level of 200 nWb/m.

Common Failures

Due to its three-motor drive, the RC 300 is relatively insensitive to the mechanical failures typically known from other cassette decks. There is another small problem: the level indicators are integrated devices, i.e. the driver chip is integrated into the display. Such devices are not made these days any more, and they are said to be somewhat...unreliable. I've had one deck with broken indicators so far, and I had to think of a 'replacement circuit' with two UAA 180 driver circuits. I've heard reports of other people who used the LED indicators from an RC 200, or people who replaced the indicators with something completely different - which is basically justified: 10 LEDs per channel, just as many as for the simpler decks, is not too much for such a high-class deck...

Spare Part Numbers

(taken from the service manual)

Cabinet Parts

Position Order No. Designation

1 339 130 109 front mask, complete

2 339 130 107 side panel, right hand

3 339 130 108 side panel, left hand

4 339 160 106 cassette frame, printed

5 339 270 109 counter window

6 339 270 110 ring for microphone jack

7 339 270 111 insert for recording level

10 339 201 107 var. knob 1 for recording level

11 339 201 108 var. knob 2 for recording level

12 339 210 109 memory button

13 339 210 110 tumbler switch button

14 339 201 109 var. button for headphone level

15 339 210 111 mains button with switch rod

16 339 210 112 microswitch for cassette flap

17 339 210 113 button cover for logic circuit

18 339 210 114 button for logic circuit

19 339 210 115 button for logic circuit

20 339 170 107 mask for cassette mechanism

25 339 150 106 housing, upper part

26 339 060 107 foot

27 339 905 966 spring for foot

28 339 064 109 felt washer

Mechanical Parts

Position Order No. Designation

29 339 820 106 bearing support

30 339 870 111 clamping piece for PCB

31 339 870 112 clamping piece for switch board

32 339 870 113 supporting angle

33 339 870 114 supporting angle

36 339 785 106 counter support

37 339 870 110 support for level indicator

38 339 910 107 bow spring

39 339 910 106 flat spring for mask

40 339 870 115 supporting angle

41 309 900 333(a) support for mains switch

42 339 870 116 cable socket for pull-relief

43 339 870 117 module holder

44 339 870 961 LED holder, 2-fold

45 339 870 108 LED holder, 3-fold

46 309 870 109 LED holder, 3-fold

Electrical Parts

Position Order No. Designation

BU 801 339 540 137 DIN socket, 5 contacts

BU 802 309 671 967 headphone jack, 3 contacts

BU 803/804 339 540 136 DIN socket, 8 contacts

HSK 1 339 350 106 record/playback head

LK 1 339 355 950 erasing head

S 1 309 630 035 mains switch

FU 1 309 627 912 fuse T 160 mA

TR 1 339 310 107 mains transformer

ZA 1 339 780 107 electronic counter

S 5/6 339 440 116 contact spring set for cassette flap

LT 1 309 695 928 mains cable

Amplifier Board

Position Order No. Designation

C 346/1346 339 510 021 trimmer 8 P 60 P

D 505 309 325 118 diode BZX 55 B 2 V 7

D 501-504/506/ 339 529 034 diode 1 N 4148 G

507/701-739/

744/752/757/

760-765/801/

802/804-806/

808-822

D 740/741 309 325 090 diode BZX 55 C 3 V 3

D 742/743 309 325 077 diode BZX 55 C 10

D 751 309 325 951 diode 1 N 4001

D 803 309 325 073 diode BZX 55 B 8 V 2

D 807 309 325 103 diode BZX 55 C 12

D 745 309 327 053 LED CQY 85 red

D 746-750/829 309 529 149 LED CQY 86 green

D 823 309 325 092 diode BZX 55 C 9 V 1

ABS 302/1302 339 335 106 level indicator, 10-fold

FI 301/1301 339 365 006 MPX filter

FI 302/1302 339 365 106 POL filter

FU 501 309 627 919 fuse T 1 A

FU 502/503 309 627 918 fuse T 800 mA

GR 501 309 322 902 rectifier B 80 B 800

GR 502 339 520 046 rectifier B 80 B 800 B 2

IC 301/1301 309 368 212 IC HA 1457

IC 501/503/ 309 368 295 IC CD 4016 AE

803/804

IC 502/801/ 339 575 120 IC UPC 4558 C

806

IC 507 309 368 105 IC UA 7818 C

IC 504 339 575 126 IC UA 7918

IC 505 339 575 068 IC UA 7824 UC

IC 506 339 575 069 IC UA 7815

IC 701/702 339 575 259 IC LM 392 N

IC 703 309 368 229 IC MC 14011 CP

IC 704 309 368 149 IC MC 14025 CP

IC 705 339 575 225 IC TL 9121 P

IC 802 339 575 260 IC U 353 M

IC 805 339 335 855 IC MC 1458 CP 1

L 301/1301 339 345 109 deemphasis coil

L 701-703 339 345 350 anti-interference coil

L 801 339 345 950 oscillator coil 85 kHz

R 346/1346 309 509 705 var. resistor 50 kOhm

R 361/714/ 309 509 401 var. resistor 10 kOhm

1361/1714

R 384/1384 309 509 735 var. resistor 25 kOhm

R 832-834 309 504 921 var. resistor 5 kOhm

R 1309 339 500 106 potentiometer 2x20 kOhm

R 1357 339 500 107 potentiometer 2x5 kOhm

RS 801/802 339 405 106 reed relay

S 701-706 339 440 964 touch switch

S 801 339 440 110 tumbler switch without button

S 802/803/807/ 339 440 112 tumbler switch without button

808

S 804-806 339 440 111 tumbler switch without button

T 301/312/ 309 001 211 transistor BC 550 B

1301/1312

T 302/313/ 309 001 242 transistor BC 550 C

1302/1313

T 304-309/311/ 339 556 224 transistor BC 548 C

314-318/390/

501-503/506/

717-721/802-805/

809-812/901/

1304-1309/

1311/1314-1318/

1390

T 310/701/714/ 339 556 077 transistor BC 548 B

715/723/814/

1310

T 702/705/706/ 309 001 226 transistor BC 558 B

724/808/813

T 707/711/712 339 556 417 transistor BC 516

T 709 339 556 124 transistor BC 517

T 713/716 339 556 094 transistor BC 337

T 725 339 556 419 transistor BC 558 C

T 726 339 001 292 transistor BC 558 C

High COM Module

Position Order No. Designation

ABS 301/1301 349 355 029 High COM module

C 1 309 411 703 Al.-electr. cap. 22 µF/6.3 V

C 2 309 410 634 Al.-electr. cap. 4.7 µF/35 V

C 8/12/18 309 412 667 Al.-electr. cap. 47 µF/50 V

C 15 309 410 655 Al.-electr. cap. 2.2 µF/25 V

C 17/20 309 411 647 Al.-electr. cap. 10 µF/16 V

C 22 309 413 486 Al.-electr. cap. 100 µF/10 V

IC 2 339 575 020 IC MC 14066 BCP

Mechanism

Position Order No. Designation

1 339 035 107 mechanism complete

HSK 1 339 350 106 record/playback head

LK 1 339 355 950 erasing head

3 339 560 107 lamp

4 339 405 109 set of contacts

5 339 405 108 set of contacts

6 339 566 111 lamp socket

8 339 720 108 head support

9 339 910 118 flat spring

10 339 720 107 plate

11 339 900 117 tension spring

13 339 725 107 pinch roller lever

14 339 755 110 pinch roller

15 339 905 113 pressure spring

16 339 905 114 pressure spring

18 339 725 108 pin

19 339 910 117 pressure spring

20 339 725 109 stopper

22 339 740 114 reel

23 339 725 106 spring ring

24 339 905 115 pressure spring

25 339 740 113 driver

27 339 910 116 torsion spring

29 339 915 118 spring

30 339 334 138(a) PCB for IC TL 170 C

		Cabinet Parts
Position	Order No.	Designation
1	339 130 109	front mask, complete
2	339 130 107	side panel, right hand
3	339 130 108	side panel, left hand
4	339 160 106	cassette frame, printed
5	339 270 109	counter window

6	339 270 110	ring for microphone jack
7	339 270 111	insert for recording level
10	339 201 107	var. knob 1 for recording level
11	339 201 108	var. knob 2 for recording level
12	339 210 109	memory button

13	339 210 110	tumbler switch button
14	339 201 109	var. button for headphone level
15	339 210 111	mains button with switch rod
16	339 210 112	microswitch for cassette flap
17	339 210 113	button cover for logic circuit

18	339 210 114	button for logic circuit
19	339 210 115	button for logic circuit
20	339 170 107	mask for cassette mechanism
25	339 150 106	housing, upper part
26	339 060 107	foot

27	339 905 966	spring for foot
28	339 064 109	felt washer
		Mechanical Parts
Position	Order No.	Designation
29	339 820 106	bearing support
30	339 870 111	clamping piece for PCB
31	339 870 112	clamping piece for switch board
32	339 870 113	supporting angle
33	339 870 114	supporting angle

36	339 785 106	counter support
37	339 870 110	support for level indicator
38	339 910 107	bow spring
39	339 910 106	flat spring for mask
40	339 870 115	supporting angle

41	309 900 333(a)	support for mains switch
42	339 870 116	cable socket for pull-relief
43	339 870 117	module holder
44	339 870 961	LED holder, 2-fold
45	339 870 108	LED holder, 3-fold

46	309 870 109	LED holder, 3-fold
		Electrical Parts
Position	Order No.	Designation
BU 801	339 540 137	DIN socket, 5 contacts
BU 802	309 671 967	headphone jack, 3 contacts
BU 803/804	339 540 136	DIN socket, 8 contacts
HSK 1	339 350 106	record/playback head
LK 1	339 355 950	erasing head

S 1	309 630 035	mains switch
FU 1	309 627 912	fuse T 160 mA
TR 1	339 310 107	mains transformer
ZA 1	339 780 107	electronic counter
S 5/6	339 440 116	contact spring set for cassette flap
LT 1	309 695 928	mains cable
		Amplifier Board
Position	Order No.	Designation
C 346/1346	339 510 021	trimmer 8 P 60 P
D 505	309 325 118	diode BZX 55 B 2 V 7
D 501-504/506/	339 529 034	diode 1 N 4148 G
507/701-739/
744/752/757/
760-765/801/
802/804-806/
808-822
D 740/741	309 325 090	diode BZX 55 C 3 V 3
D 742/743	309 325 077	diode BZX 55 C 10

D 751	309 325 951	diode 1 N 4001
D 803	309 325 073	diode BZX 55 B 8 V 2
D 807	309 325 103	diode BZX 55 C 12
D 745	309 327 053	LED CQY 85 red
D 746-750/829	309 529 149	LED CQY 86 green

D 823	309 325 092	diode BZX 55 C 9 V 1
ABS 302/1302	339 335 106	level indicator, 10-fold
FI 301/1301	339 365 006	MPX filter
FI 302/1302	339 365 106	POL filter
FU 501	309 627 919	fuse T 1 A

FU 502/503	309 627 918	fuse T 800 mA
GR 501	309 322 902	rectifier B 80 B 800
GR 502	339 520 046	rectifier B 80 B 800 B 2

IC 301/1301	309 368 212	IC HA 1457
IC 501/503/	309 368 295	IC CD 4016 AE
803/804
IC 502/801/	339 575 120	IC UPC 4558 C
806
IC 507	309 368 105	IC UA 7818 C
IC 504	339 575 126	IC UA 7918

IC 505	339 575 068	IC UA 7824 UC
IC 506	339 575 069	IC UA 7815
IC 701/702	339 575 259	IC LM 392 N
IC 703	309 368 229	IC MC 14011 CP
IC 704	309 368 149	IC MC 14025 CP

IC 705	339 575 225	IC TL 9121 P
IC 802	339 575 260	IC U 353 M
IC 805	339 335 855	IC MC 1458 CP 1
L 301/1301	339 345 109	deemphasis coil
L 701-703	339 345 350	anti-interference coil
L 801	339 345 950	oscillator coil 85 kHz
R 346/1346	309 509 705	var. resistor 50 kOhm
R 361/714/	309 509 401	var. resistor 10 kOhm
1361/1714
R 384/1384	309 509 735	var. resistor 25 kOhm
R 832-834	309 504 921	var. resistor 5 kOhm

R 1309	339 500 106	potentiometer 2x20 kOhm
R 1357	339 500 107	potentiometer 2x5 kOhm
RS 801/802	339 405 106	reed relay
S 701-706	339 440 964	touch switch
S 801	339 440 110	tumbler switch without button
S 802/803/807/	339 440 112	tumbler switch without button
808
S 804-806	339 440 111	tumbler switch without button
T 301/312/	309 001 211	transistor BC 550 B
1301/1312
T 302/313/	309 001 242	transistor BC 550 C
1302/1313
T 304-309/311/	339 556 224	transistor BC 548 C
314-318/390/
501-503/506/
717-721/802-805/
809-812/901/
1304-1309/
1311/1314-1318/
1390
T 310/701/714/	339 556 077	transistor BC 548 B
715/723/814/
1310
T 702/705/706/	309 001 226	transistor BC 558 B
724/808/813
T 707/711/712	339 556 417	transistor BC 516
T 709	339 556 124	transistor BC 517
T 713/716	339 556 094	transistor BC 337
T 725	339 556 419	transistor BC 558 C
T 726	339 001 292	transistor BC 558 C
		High COM Module
Position	Order No.	Designation
ABS 301/1301	349 355 029	High COM module
C 1	309 411 703	Al.-electr. cap. 22 µF/6.3 V
C 2	309 410 634	Al.-electr. cap. 4.7 µF/35 V
C 8/12/18	309 412 667	Al.-electr. cap. 47 µF/50 V
C 15	309 410 655	Al.-electr. cap. 2.2 µF/25 V

C 17/20	309 411 647	Al.-electr. cap. 10 µF/16 V
C 22	309 413 486	Al.-electr. cap. 100 µF/10 V
IC 2	339 575 020	IC MC 14066 BCP
		Mechanism
Position	Order No.	Designation
1	339 035 107	mechanism complete
HSK 1	339 350 106	record/playback head
LK 1	339 355 950	erasing head
3	339 560 107	lamp
4	339 405 109	set of contacts

5	339 405 108	set of contacts
6	339 566 111	lamp socket
8	339 720 108	head support
9	339 910 118	flat spring
10	339 720 107	plate

11	339 900 117	tension spring
13	339 725 107	pinch roller lever
14	339 755 110	pinch roller
15	339 905 113	pressure spring
16	339 905 114	pressure spring

18	339 725 108	pin
19	339 910 117	pressure spring
20	339 725 109	stopper
22	339 740 114	reel
23	339 725 106	spring ring

24	339 905 115	pressure spring
25	339 740 113	driver
27	339 910 116	torsion spring
29	339 915 118	spring
30	339 334 138(a)	PCB for IC TL 170 C

Available Documents

User's Manual(PDF only)
Service Manual

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