Harman kardon a 260 schematic

Page 2

A260 REPLACEMENT PARTS LIST

Part No. Description

weer/13855 Slide Switch ............... ........
ESCOM3856 Slide Switch .. .................... .
2963803 Power Transformer .. .......
JE2963804 "" ,Output Transformer ,,,,,,, . ..
JE2963810 200/ 250V Electrolytic ,,,,,,,, . _.
JE2963811 200/250V20/ 400V Electrolytic
JE2963812 20-20-20-40/450V Electrolytic
1152963813 5007500<250/'50V Electrolytic
RV2783331 1K Ohm Balance Potentiomotcr .
HC33901 Fuse Receptacle . ......
ZCOM3299 4 Amp 3 AC Fuse .. .....
ER2963550 Function Switch .. .. . ,,,,,
ER2963825 Mode Switch ._ ...... . ,,,,,,,
RV2963559 Balance Control ,,,,,,

RV2963560 Loudness Control

RV2963551 Bass Control ,,,,,,,,,,,
RV2963552 Treble Control . ,

EI2383260 Power Switch ,,,,,

PC2382890 Baxcndal Tone Network V
POOR/12927 Scratch Filter .. ,,,,,,

PC2963818 Equalization Network .. ......
JE2382720 125/250V Electrolytic .. . ,,,,,,
Jl32963542 500/ 25V Minimite Capacitor . _. V
22382924 Silicon Diode .5 Amp/300V Piv
ZCOM3566 Selenium Rectifier

12963524 Escutchcon V .. ,,,,,

L2963548 Instruction Book & Mtg Template
PCOMVSGOL. I" L L Dummy Knob L
PCOMaeog' 1 Rear Knob _ ......
PCOMB602 Front Knob

. 18.50
VVVVVVVV 4.00
VVVVVV ,, 3.50

V325
........... 4.00

Circuits :

. Output Level:

Output Impedance:
Frequency Response:

Channel Cross Talk:

TECHNICAL SPECIFICATIONS

AUDIO

Two BLSGC output tubes per channel tetrode con-
nected, operated conservatively in Class AB,, fixed
bias. Baxendal tone controls, DC heaters on preampli-
fiers and ECC82 voltage amplifier. Special phase in-
verter designed for low distortion and high gain with
minimum phase shift.

30 watts per channel, 60 watt peaksi Less than 05%
harmonic distortion at full output Less than 0.2% har-
monic distortion at 5 watts.

4, 8 and 16 ohms per channel.

i: 05 db 15-30,000 cycles per second at 1 watt-Ex-
cellent listening characteristics achieved by use of
special grain oriented high permeability cores in both
output transformers for exceptionally wide frequency
response and improved transients.

Better than 50 db.

Minimum Volume Hum: 95 db below 30 watts,

High Level Hum:

85 db below 30 watts,

Low Level Phone Hum: 75 db below 30 watts.
Tape Head Input Hum: 65 db below 30 watts.

Tone Controls:

Regulation:

Rumble Filter:
Scratch Filter:

Input Levels:

New frictionclutch ty e controls for separate or
ganged action. Range 0 bass and treble is i 16 db
at 50 and 10,000 cycles per second Special front panel
tone control defeat switch to hy-pass tone controls
completely, This feature eliminates tone control phase
shift even when the controls are in the flat position,
and insures clean, transparent sound.

13+ regulation is held to within 1% by use of silicon
diode power supply, and special power transformeri
This provides cleanly defined low frequency response
and superb overload characteristics.

Subsonic filter to eliminate record and turntable
rumble. 12 db per octave below 50 cycles per second

Rolls 0H objectionable record scratch at 12 db per
octave above 6,000 cycles per second.

High level inputs: 300 millivolts, lz megohm,

Low level phone: 3 millivolts at 1 KC.

High level phone: 60 millivolts at 1 KC.

Tape: 1 millivolt at 250 cycles
per second.

Tape Output Recording

Level:

Equalization:

2 volts from each channel, unmodified by volume and
tone controls, I

Phono: BIAA
Tape: NARTB