CM-S217D
Vacuum tube output transformer
L12 50% Nickel alloy laminations (same as Peerless S217D)
•
•
•
•
Replacement for Peerless S217D but with different mounting arrangement
Excellent bandwidth & excellent phase shift
Tertiary windings closely coupled to other windings
Layer wound
The original Peerless S217D transformers are nearing their end of life. Many are exhibiting current leakage
between windings which can cause low level pops which progressively get worse over time. The CM-S217D
has been carefully engineered to replicate the performance characteristics of the Peerless part. The S217D
used L12 laminations. That tooling was scrapped out many years ago when the company that originally
manufactured them was bought out. CineMag produced its own tooling at very great expense to make these
laminations, using the original drawings. The mu-metal used to produce these laminations come from the
same original company and the alloy is the same.
CM-S217D
Parameter
Conditions
Typ
Turns Ratio
22.2 : 4.96 : 1
Primary Inductance
f=1kHz
Test Circuit 1
38.1H
Leakage Inductance
f=1kHz
Test Circuit 1
19mH
Voltage Gain
12,500:600/300 + tertiary
3125:150/75 + tertiary
Distortion (THD+N%)
1kHz +0.0dBu
20Hz +0dBu
Max output level
Rs=600 RL=600
Test Circuit 1
+20dBm
Phase Shift at 20 Hz
Phase Shift at 20 kHz
Rs=600 RL=600
Test Circuit 1
nil
-1E
CMRR
60 Hz Test Circuit 2 per IEE Std 389-1996 ¶19 1
kHz Test Circuit 2 per IEE Std 389-1996 ¶19
Operating Temp Range
Operation and storage
CineMag, Inc.
9050 Independence Ave.
Canoga Park, California 91304
REV A
F (818) 993-4644
Rs=600 RL=600
Test Circuit 1
0.02%
0.1%
-115dBu
-102dBu
0E C Min
J [email protected]
70E C Max
http://www.cinemag.biz
Copyright 2016 CineMag Inc. All rights reserved
CM-S217D Amp v Phase Rs=10K RL=10K RLT=1.5K
+10
+80
+9
CM-S217D Amp v Phase Tertiary Winding Rs=10K RL=10K RLT=1.5K
-0
+80
-1
+70
+8
+70
-2
+60
+60
-3
+7
+50
+6
+5
+4
+50
-4
-5
+40
+40
-6
+30
+30
-7
+3
+20
+20
-8
+2
+10
+1
d
B
u
Phase
-0
-1
+0
Amplitude
+10
-9
d
e
g
-10
Phase
d
B -10
u
-11
+0
Amplitude
-10
-12
-2
-20
-20
-13
-3
-30
-4
-6
-30
-14
-40
-5
-40
-15
-16
-50
-50
-17
-7
-60
-60
-18
-8
-70
-9
-10
10
20
50
100
200
500
1k
2k
5k
10k
20k
50k
100k 200k
-70
-19
-20
10
-80
20
50
100
200
500
1k
CM-S217D Amp v Phase Rs=10K RL=600 RLT=1.5K
+10
2k
5k
10k
20k
50k
100k 200k
CM-S217D Amp v Phase TERTIARY Rs=10K RL=600 RLT=1.5K
-0
+80
+9
+80
-1
+70
+70
-2
+8
+60
+60
-3
+7
+50
+6
+5
+50
-4
-5
+40
+4
+40
-6
+30
+3
+30
-7
+20
+20
+2
-8
+10
+1
Phase
-0
+0
Amplitude
-1
-10
-2
d
e
g
+10
-9
d
B -10
u
-11
Phase
+0
-3
-10
-20
-13
-30
-4
-40
-5
-6
-50
-7
-30
-14
-40
-15
-16
-50
-17
-60
-8
-60
-18
-70
-9
20
50
100
200
500
1k
2k
5k
10k
20k
50k
100k 200k
-80
Amplitude
-20
10
20
50
100
200
500
1k
2k
5k
10k
20k
50k
100k 200k
+80
+9
+70
CM-S217D Amp v Phase Tertiary Winding Rs=600 RL=10K RLT=1.5K
-0
+80
-1
+70
-2
+8
+60
+60
-3
+7
+6
+5
+50
-4
+40
-5
+50
+40
-6
+4
+30
+30
-7
+3
+20
+20
-8
+2
Amplitude
+1
-0
Phase
-1
+10
d
+0 e
g
-10
Amplitude
-9
d
B -10
u
-11
+10
+0
Phase
-10
-12
-2
-20
-20
-13
-3
-4
-5
-30
-14
-40
-15
-30
-40
-16
-6
-50
-50
-17
-7
-60
-60
-18
-8
-9
-10
10
-80
Hz
Hz
CM-S217D Amp v Phase Rs=600 RL=10K RLT=1.5K
+10
-70
-19
Hz
d
B
u
d
e
g
-12
-20
-10
10
-80
Hz
Hz
d
B
u
d
e
g
20
50
100
200
500
1k
2k
Hz
5k
10k
20k
50k
100k 200k
-70
-19
-80
-20
10
-70
20
50
100
200
500
1k
2k
Hz
5k
10k
20k
50k
100k 200k
-80
d
e
g
CM-S217D Amp v Phase Rs=600 RL=600 RLT=1.5K
+10
CM-S217D Amp v Phase Tertiary Winding Rs=600 RL=600 RLT=1.5K
-0
+80
+9
+80
-1
+70
+70
-2
+8
+60
+60
-3
+7
+50
+6
+5
-5
+40
+4
+40
-6
+30
+30
-7
+3
Amplitude
+2
+20
+20
-8
+10
+1
d
B
u
+50
-4
-9
d d
+0 e B
g u
-0
Phase
-1
Amplitude
-10
+10
+0
Phase
-11
-10
-2
-10
-12
-20
-20
-3
-13
-30
-4
-6
-30
-14
-40
-5
-40
-15
-16
-50
-7
-50
-17
-60
-60
-8
-18
-70
-9
-10
10
20
50
100
200
500
1k
2k
5k
10k
20k
50k
100k 200k
-70
-19
-80
-20
10
20
50
100
200
500
1k
2k
Hz
CM-S217D THD @ Fixed Freq. Rs=10K RL=600
1
5k
10k
20k
50k
100k 200k
Hz
CM-S217D THD @ Fixed Freq. Rs=600 RL=10K
1
0.5
0.5
20Hz
30Hz
0.2
0.2
40Hz
50Hz
0.1
0.1
60Hz
20Hz
%
%
0.05
0.05
30Hz
40Hz
0.02
0.02
50Hz
60Hz
0.01
0.01
0.006
0.006
+0
+5
+10
+15
+20
+0
+25
+5
+10
CM-S217D THD @ Fixed Freq. Rs=600 RL=600
1
+15
+20
+25
dBu
dBu
CM-S217-D THD vs Freq Rs=10K RL=10K NOTE: thd goes down with amplitude
1
+0dBu
0.5
+6dBu
0.5
0.2
0.1
0.2
+12dBu
+18
dBu
0.05
+24dBu
0.02
0.1
20Hz
%
%
0.05
0.01
0.005
30Hz
0.002
40Hz
0.02
0.001
50Hz
60Hz
0.0005
0.01
0.0002
0.006
+0
+5
+10
+15
dBu
+20
+25
0.0001
20
50
100
200
500
1k
Hz
2k
5k
10k
20k
-80
d
e
g
CM-S217-D THD vs Freq Rs=600 RL=10K NOTE: thd goes down with amplitude
1
0.5
0.5
0.2
0.2
0.1
0.1
0.05
0.02
Bu
+12dBu
+18
%
dBu
0.005
+0dBu
+12
dBu
0.02
0.01
%
+6d
0.05
+0dBu
+6dBu
CM-S217-D THD vs Freq Rs=600 RL=600 NOTE: thd goes down with amplitude
1
+18
0.01
dBu
0.005
+24dBu
+24dBu
0.002
0.002
0.001
0.001
0.0005
0.0005
0.0002
0.0002
0.0001
20
50
100
200
500
1k
2k
5k
10k
0.0001
20
20k
50
100
Hz
-5
-10
-15
-20
-25
-30
-35
-40
-45
-50
-55
d
B
u
-60
-65
-70
-75
-80
-85
-90
Secondary
-95
-100
-105
-110
Tertiary
-115
-120
20
50
100
200
500
1k
2k
5k
10k
20k
Hz
CM-S217D FFT Rs=10K RL=10K
-10
+0
-15
-10
-20
-25
-20
-30
-30
-35
-40
-40
-45
-50
-50
-55
-60
-60
-70
-65
-70
d
B
u
-80
-75
-90
-80
-85
RED = Secondary
GREEN = Tertiary
-90
-100
-95
-110
-100
-120
-105
-110
-130
-115
-140
-120
-125
-150
-130
-160
-135
-140
-170
-145
-150
2k
4k
6k
8k
500
1k
Hz
CM-S217D CMRR Rs=10K RL=600 + 600
+0
200
10k
12k
Hz
14k
16k
18k
20k
22k
24k
-180
d
B
u
2k
5k
10k
20k
CM-S217D FFT Rs=10K RL=600
-10
+0
-15
-5
-20
-10
-25
-15
-20
-30
-25
-35
-30
-40
-35
-45
-40
-50
-45
-55
-50
-60
d
B
u
-55
-65
-60
-70
-65
-75
-70
-80
-75
-85
-80
-90
-85
d
B
u
-90
-95
-95
-100
RED = Secondary
GREEN = Tertiary
-105
-110
-100
-105
-110
-115
-115
-120
-120
-125
-125
-130
-130
-135
-135
-140
-140
-145
-150
-145
2k
4k
6k
8k
10k
12k
14k
16k
18k
20k
22k
24k
-150
Hz
CM-S217D FFT Rs=600 RL=10K
-10
+0
-15
-10
-20
-25
-20
-30
-30
-35
-40
-40
-45
-50
-50
-55
-60
-60
-70
-65
-70
d
B
u
-80
-75
-90
-80
-85
RED = Secondary
GREEN = Tertiary
-90
-95
d
B
u
-100
-110
-100
-120
-105
-110
-130
-115
-140
-120
-125
-150
-130
-160
-135
-140
-170
-145
-150
2k
4k
6k
8k
10k
12k
14k
16k
18k
20k
22k
24k
-180
Hz
CM-S217D FFT Rs=600 RL=600
-10
+0
-15
-10
-20
-25
-20
-30
-30
-35
-40
-40
-45
-50
-50
-55
-60
-60
-70
-65
-70
d
B
u
-80
-75
-90
-80
RED = Secondary
GREEN = Tertiary
-85
-90
-100
-95
-110
-100
-120
-105
-110
-130
-115
-140
-120
-125
-150
-130
-160
-135
-140
-170
-145
-150
2k
4k
6k
8k
10k
12k
Hz
14k
16k
18k
20k
22k
24k
-180
d
B
u
CM-S217D
BOTTOM VIEW