Marchand Electronics MB26 Assembly Instructions Manual

Marchand Electronics Inc.

PO Box 18099, Rochester NY 14618

Tel:[phone] Fax:[phone]

[e-mail] www.marchandelec.com

(c)2006 Marchand Electronics Inc.

MB26 Push-pull tube amplifier

Marchand Electronics Inc www.marchandelec.com 585 423 0462

Parts List

A section

R1 10K0 1% metal film
R2 1K00 1% metal film
R3 49K9 1% metal film
R4 1M00 1% metal film
R5 49K9 1% metal film
R6 49K9 1% metal film
R7 1M00 1% metal film
R8 1K00 1% metal film
R9 49K9 1% metal film
R10 100K 1% metal film
R11 1K00 1% metal film
R12 200 Ohm 3W
C1 0.047uF,250V film
C2 0.22 F,250V film
C3 0.047uF,250V film
C4 0.47uF,250V film
V1 12AX7WA dual triode
V2 EL84 pentode

B section

R1 10K0 1% metal film
R2 1K00 1% metal film
R3 49K9 1% metal film
R4 1M00 1% metal film
R5 49K9 1% metal film
R6 49K9 1% metal film
R7 1M00 1% metal film
R8 1K00 1% metal film
R9 49K9 1% metal film
R10 100K 1% metal film
R11 1K00 1% metal film
R12 200 Ohm 3W
C1 0.047uF,250V film
C2 0.22uF,250V film

C3 0.047uF,250V film
C4 0.47uF,250V film
V1 12AX7WA dual triode
V2 EL84 pentode
__________________________________________

R13 nu
R14 1K00 1% metal film
R15 19K1 1% metal film
R16 2K21 1% metal film
R17 10K0 1% metal film
R18 2K21 1% metal film
R19 nu
R20 3K92 1% metal film
R21 2K trimmer
R22 180K 1/2 W

CB 0.1uF axial monolythic
C5 100uF,250V aluminum electrolytic
C6 100uF,250V aluminum electrolytic
C7 100uF,250V aluminum electrolytic
C8 330uF,25V aluminum electrolytic
C9 330uF,25V aluminum electrolytic
C10 0.001 uF polypropylene

L1 Wire jumper

D1,2,3,4 UF4007 ultra fast 1A diode
D5,6 1N5248 18V zener
D7 UF4007 ultra fast 1A diode
D8 1N5248 18V zener
D9 1N5232 5.6V zener
D10 LED
D11 UF4007 ultra fast 1A diode

IC1 SG2525 DIP16 socket

Marchand Electronics Inc www.marchandelec.com 585 423 0462

Q1 IRFP240 MOSFET
Q2 PN2222A NPN
Q3 IRF540 MOSFET
Q4 IRF540 MOSFET

T1 P3622 2T+2T / 40T 26 AWG

Packing list

1 IRFP240 MOSFET
1 PN2222A NPN
2 IRF540 MOSFET

Tubes

2 12AX7WA dual triode
2 EL84 pentode

Resistors

4 100 Ohm 2W
7 1K00 1% metal film
2 2K21 1% metal film
1 3K92 1% metal film
3 10K0 1% metal film
1 19K1 1% metal film
8 49K9 1% metal film
2 100K 1% metal film
1 180K 2W
4 1M00 1% metal film
1 2K trimmer

Capacitors

1 0.001 uF polypropylene
4 0.047uF,250V film
2 0.22 F,250V film
2 0.47uF,250V film
5 0.1uF axial monolythic
3 100uF,250V aluminum electrolytic
2 330uF,25V aluminum electrolytic

Semiconductors

6 UF4007 ultra fast 1A diode
3 1N5248 18V zener
1 1N5232 5.6V zener
1 LED
1 SG2525 switchmode converter

1 transformer P3622 w. hardware
1 transformer Hammond 1608
1 2-pos. small terminal blocks
1 3-pos. small terminal blocks
2 4-pos. small terminal blocks
4 9-pin tube socket
1 16-pin DIP socket
6 #6 hex standoff
6 #6 star lockwasher
6 6/32 x 1/4" machine screw,
10 6/32 x 1/4" machine screw, black buttonhead
12 6/32 x 1/2" machine screw, black buttonhead
1 4/40 x 1/2" machine screw, black buttonhead
1 4/40 hex nut
1 MICA insulator TO247
1 Thermal grease
1 MB26 circuit board
1 rear panel
1 top cover
1 bottom cover
4 stick-on rubber bumper
1 Wood Base
1 nameplate w. screws
1 RCA connector, red, w. hardware
1 Binding post, red
1 Binding post, black
1 BInding post guide
1 power connector
2' 22 gauge wire, red
2' 22 gauge wire, black
2' shielded wire, 2 conductor
1 15, 4A universal power supply

Marchand Electronics Inc www.marchandelec.com 585 423 0462