Quad 405 Power Amplifier

Quad 405 Power Amplifier


Quad 405 Power Amplifier (1975-1993)


Quad 405 1

Quad 405 1

Quad 405 2

Quad 405 2

pdfSchematics Quad 405 1 pdfOwners Manual Quad 405 1
pdfService Manual Quad 405 2 pdfOwners Manual Quad 405 2

A little pub and it is well deserved!

Dada Electronics, a specialist for the maintenance
of your Quad amplifiers and tuners. Dada Electronics
sells electronic audio and related components as well
as upgrade and overhaul kits for quads.




TECHNICAL SPECIFICATIONS


Continuous Power (RMS) 2 X 100 watts/8 ohms
Power Band: 20Hz/20Khz
Total Harmonic Distortion: 0,05%/8 ohms
Intermodulation distortion: 0,05%
Input sensitivity: 0.5V
Signal to noise ratio: 95dB
Output Impedance: 4 to 16 ohms

Dimensions: 340,5 x 195 x 115 mm
Weight: 9 Kg



Wholesale Electronics.Inc (NTE)

pdf LM301A DATASHEET

Transistors Equiv Other
BC214C BC213-BC416 BC560C-NTE294
ZTX304 BCW18-BC546B BCW10-2N5551
ZTX504 BCW19-BCW11 BC556B-2N2905A
40872 BD244D-BD242C TIP42C-2N6134
BDY77 BDY75-BD249D 2N3773-NTE284
BDY 77 MJ 15015
Aop Pcb Iss
LM 301A PCB M12368 ISS 5-6-7

BOARD NUMBER M12368 ISS 9-10 (Quad 405-1)

Pcb 12368 ISS 9 - Number: 9000 at 29 000.

Pcb 12368 ISS 10 - Number: 29000 at 59 000.

Transistors Equiv Other
BC214C BC213-BC416 BC560C-NTE294
ZTX304 BCW18-BC546B BCW10-2N5551
ZTX504 BCW19-BCW11 BC556B-2N2905A
40872 BD244D-BD242C TIP42C-2N6134
2SD424 MJ15003-2N3773 BDX50-NTE284
RCA17556 MJ15003-2SD424 2N3773
Aop Pcb Iss
LM301A PCB M12368 ISS 9-10

BOARD NUMBER M12565 ISS 3-5-6-7.


Pcb 12565 ISS 3 - Number: 59001 at 64 999 (Quad 405-1)
The first 405-2 circuit diagram was 12333 issue 7
and the Pcb reference M12565 ISSU 5.(janvier 1983)

Pcb 12565 ISS 5 - Number: 65 000 at 66 699 (Quad 405-2) - janvier, mai 1983

Pcb 12565 ISS 6 - Number: 66 700 at 72 500 (Quad 405-2) - mai 1983 / august 1984

Pcb 12565 ISS 7 - Number: 72501 at 85 000 (Quad 405-2) - august 1984 / february 1986

Transistors Equivalents Other
BC214C BC213-BC416 BC560C-NTE294
ZTX304 BCW18-BC546B BCW10-2N5551
ZTX504 BCW19-BCW11 BC556B-2N2905A
40872 BD244D-BD242C TIP42C-2N6134
2SD424 MJ15003-2N3773 BDX50-NTE284
RCA17556 MJ15003-2SD424 2N3773
Aop Pcb Iss
TL071 PCB M12565 ISS 3
NE5534-LM351 PCB M12565 ISS 3
LM301 PCB M12565 ISS 3
TL071 PCB M12565 ISS 5-6-7


pdf TL071 DATASHEET pdf NE5534 DATASHEET pdf LM351 DATASHEET

Capacitors of Quad 405 and 405-2

BOARD NUMBER M12368 ISS 5-6-7

Capacitors Volts Number
0.68 µf 100 C1
100 µf 10 C2
3.3 pf C3
0.047 µf 250 C4
100 µf 6.3 C5
1000 pf 400 C6
330 pf C7
120 pf C8
47 µf 40 C10
330 pf C11
0.1 µf 250 C12
10 000 µf 63 C13
10 000 µf 63 C14
0.047 µf C18 - (BOARD ISS 7)



BOARD NUMBER M12368 ISS 9-10

Capacitors Volts Number
0.68 µf 100 C1
100 µf 10 C2
3.3 pf C3
0.047 µf 250 C4
100 µf 6.3 C5
1000 pf 400 C6
330 pf C7
120 pf C8
47 µf 40 C10
330 pf C11
0.1 µf 250 C12
10 000 µf 63 C13
10 000 µf 63 C14
0.1 µf 100 C15
0.1 µf 100 C16
10 µf 40 C17
1000 pf C19


BOARD NUMBER M12565 ISS 3-5-7

Capacitors Volts Number
680 nf 100 C1
100 µf 10 C2
3.3 pf C3
47 nf 250 C4
100 µf 6.3 C5
1 nf 400 C6
330 pf C7
120 pf C8
47 µf 40 C10
1000 pf C11
100 nf 250 C12
10 000 µf 63 C13
10 000 µf 63 C14
100 nf 100 C15
100 nf 100 C16
10 µf 40 C17