Tandberg 1800 X Schematic

Page 1

T andberg
Series 1800

lEFl
MICHROPNON AMPLIFIER

C 20L

LEFI
RECORDING AMPLIFIER

LEF' REC LEVEL
INDICAIOR
one/Imp:

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R250
R254
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R260
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MICROPHONE AMPLIFIER
Rm"

Milepunkter: A Siukkespenning (Frekvl : 7W100 kHz)

Test points: A Erase voltage (Freq.: 70-100 kHz)

lesomhet ved 400 Hz:
Sensitivity at 400 Hz:

RECORDING AMPLIFIER
HIGH!

0 Venstre kanal (Ipvre spor)
D Hipyre kanal (nedre spor)

0 Left ch, (upper track)
[3 Right ch. (lower track)

RIGHI REC LEVEL
INDICAIOR
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Signalspenning (400 Hz)

Signal voltage (400 Hz)

1 2 3 4 5

6 7 a

80-120V 7mV 1,5mV 45 mV 2,2V

0, 25 mV 150 mV 0,75 V

Béndopptakeren i stilling innspilling med RECORD
LEVEL kontrollene satt til maksimum.

Record mode with the RECORD LEVEL controls
set to maximum.

Avspilling av standard nivé-
bind (Tandberg justérbzmd
nr. 4).

Playback of standard level
test tape (Tandberg Test
Tape No. 4).

Likespenninger, typiske verdier, er pziflpn i skjemaet. Spenningene er angitt i volt, cg er mélt med mrvoltmeter

(RI = 60 M52), uten signal tillant forsterkernel

Spenninger i parantes relererer til innspillingl

DC voltages, typical values, are indicated in the schematic The voltages are given in volts. and are measured
with VTVM (Ri = 60 M9), without signal applied to the amplifiers

Voltages given in paranthesis refer to record mode.

ems AND ERASE
OSCILLA'UR as in:

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