daylight Linear User Manual
R
470k
0.5W
R
4
12k 0.5W
C
R
470k
0.5W
R
470k
0.5W
120pF
8
9
7
6SN7
V
2a
R
11
47k
2W
R
47k
2W
12
560
a a
R
a a
V
10
0.5W
2b
6SN7
C
0.2µF
600V
R
330k
0.5W
R
330k
0.5W
C
0.2
600V
4
13
µ
14
5
F
2.2k
R
R
1k
0.5W
R
20
2W
15
350
17
C
100
50V
R
16
1k
0.5W
6
µF
C
R
0.2µF
600V
470k
0.5W
560k
0.5W
C
0.2
600V
19
R
R
22k
2
6
7
3
µF
1W
6SL7
V
1a
R
1
1k 0.5W
R
3
C
1
500µF
6V
a a
a a
V
R
2
220
0.5W
1b
100k
1W
R
100k
1W
4
5
6SL7
V
a a
10W
a a
V
3
4
6L6
6L6
Red
Gr
Grey
ey
Blue
Blue
T
1
osound
Acr
TO 300
6600 a-a
Output
16
8
4
0
Please r
The Hafler & Kero e s U l t ra-Linear Amplifier
The Hafler & Kero e s U l t ra-Linear Amplifier
from Audio Engineering 1951
from Audio Engineering 1951
Redrawn in the or i g i a n l American style layout
Redrawn in the or i g i a n l American style layout
by Keith Snook (1996 - updated 2008)
by Keith Snook (1996 - updated 2008)
eport any inaccuracies
or omissions to:
info@dc-daylight.ltd.uk
d.c. ~ daylight ltd
d.c. ~ daylight ltd
.
.
C
20
µF
450V
8
C
20µ
450V
9
F
315mA
L
a.c.
mains
in
N
T
2
F
1
AS
370V
@ 150mA
370V
@ 150mA
5V@ 3A
5V4
V
C
5
10
40µ
450V
F
L
1
10H > 150mA
C
11
40
µF
450V
a
6.3V@4A
a
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