DE

22K / 3W 10K / 3W

C

C

0.022

.1

10K

470

1M

1M

Presence5K-L

100K 0.022

1500

100K

0.022

100K

82K 1500

100K

1Ω

1Ω

470Ω/3W

470Ω/3W

SPEAKER(8 OHMS)

1

2

3

8

7

6 5

8

3

4

8

5

3

4

V3-A

V3-B

6V6V4

6V6V5

B A

1N4007

BIAS50K-L

15K

BIAS RANGE220K / 1W

+ 25µF

12AX7PHASE

INVERTER

32/32uF

Plates Screens Phase Inverter Tone Stack Driver

10K / 3W

22uF

Preamp+ 25µF

47K A400v

B397v

C270v

D232v

E217v

.1

47pF

Mark Huss’s Plexi 6V6Drawn by Steve Luckey

820Ω

100K

V1-A

330

uF

1

2

3VOL 2

NORMAL

1M L

OG

VOL 1BRIGHT

1M L

OG

.0022uF

.022uF 470K

.0047uF

470K

470pF

2.7K

100K

0.68

uF

6

7

8

12AX7V1-B

1M L

OG

820Ω

100K

12AX7V2-A

0.68

uF

1

2

3

6

7

8

100K

TREBLE

470pF

C9.022uF

C11.022uF

33K

1M L

OG

25K

LIN

V2-B

250K

LIN MSTR VOL

BASS

MID

68K

D

E

E

1M

68K

32/32uF

6.3 VAC

5 VAC

330 VAC

330 VAC 68

24

7

2

V2

4

9

5

V3 V4

Line voltage is 120 VAC

7

24

9

5

V1

4

9

5

V5

GZ34V62

1

3

2 AMPSLO BLO POWER

LIN

EN

EUTR

AL

GROUND

HammondAO-24159-0

14HDCR = 487Ω

not enough NFBchanged to 22K

removed because channel was too bright

160v

1.5v

0v

120v

0v

0.8v

132v

133v

232v

187v

173v

29v28v

-36v

-36v

0.026v

0.024v

396v

396v

394v

394v

-36v

Hammond AO-24157-1from AO-43

Hammond AO-24158-0from AO-43

12

345

67

89

12

345

67

89

12

345

67

89

45

67

8 1

23

45

67

8 1

23

T

S

G

Normal1M-A

Presence5K-L

Master1M-A

Midrange25K-L

Treble250K-L

0.68µF

100

v

+ +

330µ

F 25

V

+ +

22µF

500

V

0.68µF

100

v

470p

NFB

E

1N40

07

Bright1M-A

Bass1M-A

0.1µF 250v

470p

B C D

45

67

8 1

23

1Ω 1Ω

HammondAO-24159-0

A

B

C

DD

C

B

OT

+ +

25µF

150

V

+ +

25µF

150

V

Bias50K

.022µF

630

v

.022µF

630

v

.022µF

630

v

.022µF

630

v

.022µF

630

v

.022µF

630

v

.002

2µF

630v

.1µF

630

v

47

FUSE

45

67

8 1

23

PT

6.3 VAC

1

2

32

1

3

N

L

G

.022

µF 6

30v

.022

µF 6

30v

INSTRUCTIONS FOR PRINTING DRILL GUIDE

NOTE… This drawing contains layers. Turn off any layers that you don’t want to print.

Board size is 3 1/8" X 6 7/8". Print this drill guide FULL SIZE on letter sized paper. Use one template as a drill guide. The other template will be used for installing jumpers. Measure the board length of the printout to verify it is 6 7/8". Attach to blank board using double sided carpet tape. Use a center punch to put a mark at the cross hairs of each turret, standoff, and hole. Use a 3/32" drill bit to drill all holes. Then enlarge holes as needed for screws and wire pass thru.

6 7/8"

3 1/

8"

Turret --- drill size is 3/32"

Hole for wire pass thru – drill size to fit

Standoff – drill size to fit

Dashed lines are underboard jumpers

0.68

µF 1

00v

+ +

330µ

F 25

V

+ +

22µF

500

V

0.68

µF 1

00v

470p

NFB

E

0.1µ

F

1N40

07

B C D

1Ω 1Ω

+ +

25µF

150

V

+ +

25µF

150

V

.022

µF 6

30v

.022

µF 6

30v

.022

µF 6

30v

.022

µF 6

30v

.002

2µF

630v

12

345

67

89

45

67

8 1

23

45

67

8 1

23

12

345

67

89

45

67

8 1

23

12

345

67

89

2.5" x 1.5"

1 1/4" 1"1 1/4"1 3/4"1 3/4"1 3/4"3 3/4"

2 1/2"

T

S

G

Presence5K-L

Master1M-A

Bass1M-A

Midrange1M-A

Treble250K-L

Bright1M-A

Normal1M-A

1 1/4"1 1/4"1 1/4"1 1/4"1 1/4"1 1/4" 1 1/4"1 1/4" 1 1/4"1 1/4"

2 3/4"

1'-1/2"

6

8

100

2

4 6

8

100

2

4 6

8

100

2

4 6

8

100

2

4 6

8

100

2

4 6

8

100

2

4 6

8

100

2

4

6

8

100

2

4 6

8

100

2

4 6

8

100

2

4 6

8

100

2

4 6

8

100

2

4 6

8

100

2

4 6

8

100

2

4NORMALBRIGHTTREBLEMIDDLEBASSMASTERPRESENCE INSTRUMENTPOWER

NORMALBRIGHTTREBLEMIDDLEBASSMASTERPRESENCE INSTRUMENTPOWER

1 1/4" 1 1/4" 1 1/4" 1 1/4" 1 1/4" 1 1/4" 1 1/4" 1 1/4" 1 1/4" 1 1/4"

1'-1/2"

2 AMP SLOWBIAS8Ω SPEAKER POWER

1 3/4" 1 1/2" 1 5/8" 1 1/2"

FUSE

2 AMP SLOWBIAS8Ω SPEAKER POWER

Cut to fit