Toa P-150M Instruction Manual

TOA ELECTRIC CO, LTD.
KOBE, JAPAN
TOA PROFESSIONAL POWER AMP
Operating Instruction Manual
Model P-150M, P-300M

Contents
Precautions................................................ 2
General Description........................................ 2
Features................................................... 3
Speci ications ........................................... 4~5
Per ormance Graphs ..................................... 6~9
Front Panel............................................... 10
Rear Panel................................................ 11
Input/Output Connections.............................. 12~14
Installation Precautions ................................ 15~17
25/70 Volt Distribution Systems ........................ 18~19
Appearance ............................................... 20
— 1 —

1. XLR type audio connectors are actory wired as ollows.
Pins 1 and 2 are ground (shield); pin 3 is hot (high, plus).
The connector wiring changes with use o an optional matching trans ormer.
(Model No. PU-101T)
Pin 1 is ground (shield), Pin 2 is cold (low, minus), and pin 3 is hot (high,
plus).
2. Care should be taken in making connections, selecting signal sources and
controlling the output level to avoid any damage to loads.
3. Never place the two ampli ier outputs parallel to each other.
4. Do not operate the ampli ier rom a power mains which exceeds the
indicated mains voltage by more than 10%.
5. Never connect the output o the ampli ier to any other power source.
6. Do not expose the ampli ier to corrosive chemicals or liquids, such as so t
drinks, salt water, etc.
7. Always re er the ampli ier to quali ied technical service personnel. There
are no user servicable parts inside.
The P-150M and P-300M are pro essional quality single channel (mono) power
ampli iers, with 8 ohm outputs and built-in output trans ormers or 25-volt and
70-volt lines, designed or commercial and pro essional sound applications.
The P-150M and P-300M deliver 150 watts and 300 watts, respectively, with 8 ohm
loads or with 25-volt or 70-volt distributed system loads.
Both eature provisions or octal socket mounting o matching trans ormers to
convert unbalanced inputs to balanced, magnetic circuit breakers, calibrated
input attenuators short circuit protection circuitry, 3-second turn-on delay,
current limiter protection circuitry, protection indicator LED's ground terminal
strip and high pass ilter. These eatures combine to ensure an extremely high
level o reliability and durability.
Each ampli ier is mechanically rein orced with a rugged ront panel made o
3mm(l/8") thick cast-aluminum, and urther strengthened by use o 3mm(l/8")
thick steel liner, thus enabling them to withstand even the roughest use.
For easy maintenance and service, the ampli iers are built with modular, plug-in
boards on a sub-chassis that can be quickly removed or repair or replacement.
General Description
Precautions
— 2 —

Features
1. Ma netic Circuit Breaker Power Switch
Both the primary mains (A.C. line) overload protection and the on/o switch
are combined into a rocker-actuated, magnetic circuit breaker whose
operation, unlike uses, is predictable and independent o temperature.
Returning the switch to the "on" position resets the system.
2. Calibrated Input Attenuator
A 22-step detented input attenuator is provided or easy, accurate input
sensitivity adjustment. The attenuators are in 2dB steps rom 0dB
attenuation to -34dB, then in steps o -37dB, -42dB, -50dB, in inity. This
arrangement provides a smooth, noise ree transition rom the highest to the
lowest audio level.
3. Short-Circuit Protection Circuitry
Speaker protection is provided with relay circuitry that disconnects the load
whenever a short-circuit or harm ul D.C. current is present across the output
terminals.
4. 3-Second Turn-On Delay
To help eliminate annoying clicks or pops which can occur upon turn-on in
large sound systems, a three second mute/delay circuit is incorporated. The
mute/delay circuit actuates the relay, and then disconnects the speaker the
instant the circuit breaker is shut o .
5. Current Limiter Circuitry
Protection against shorted and low impedance loads is provided with
dependable current limiting as well as protection against overloaded power
supplies and input overload.
6. Protection Indicator LED (Includin Thermal Warnin )
The LED illuminates when the protection relay is activated in the ollowing
situations.
1) Short-circuit
2) D.C. dri t
3) Turn-on delay
The LED also lashes when either o two heat sinks reaches more than 105°C
in temperature.
7. Si nal Presence Indicator LED
The LED glows when a signal greater than -30dB level is ed to the inputs
regardless o the input attenuator setting and output power level. The LED is
help ul in assuring su icient input signal is ed to drive the ampli iers.
8. Peak Indicator LED
The LED is actuated by means o an input/output comparator, and glows
when the output signal is clipped.
9. Ground Terminal Strip
Provision or isolating chassis ground rom signal ground is provided on the
rear panel.
10. Heavy Aluminum Die-Cast Panel
The power ampli iers are constructed to withstand even the roughest use on
the road. Their aluminum die-cast ront panels are mountable in standard
19-inch rack. A pair o sturdy carrying handles provides protection or the
ront panel controls and easy handling.
11. Built-in Matchin Transformer
The matching trans ormer is provided or a constant voltage distribution
system o 70 volts or 25 volts.
— 3 —

(DIRECT OUTPUT)
Power Output
150 watts minimum sine wave continuous average power
output with 8-ohms loads over a power band rom 20Hz to
20kHz. The maximum Total Harmonic Distortion (THD)
at any power level rom 250 milliwatts to 150 watts shall
be not more than 0.1%.
220 watts minimum sine wave continuous average power
output with 4-ohm loads over a power band rom 20Hz to
20kHz. The maximum Total Harmonic Distortion (THD)
at any power level rom 250 milliwatts to 220 watts shall
be not more than 0.15%.
160 watts continuous average sine wave power into 8
ohms with less than 0.1% THD, at 1 kHz.
Frequency Response
+0dB, -0.5dB, 20Hz to 20kHz
Total Harmonic Distortion
Less than 0.01% at 150 watts, 8-ohms, 1kHz
Less than 0.1% at 150 watts, 8-ohms, 20Hz to 20kHz
Intermodulation Distortion
0.05% using requencies o 60Hz and 7kHz, mixed in a ratio
o 4:1, at power output o 50 watts into 8-ohms
Input Sensitivity
An input o +4dB (1.23V), ±0.5dB, produces an output o
150 watts into 8-ohm, INPUT ATTENUTOR set or
maximum level
Input Impedance
10k-ohms (unbalanced)
Dampin Factor
Greater than 150 at any requency rom 20Hz to 1kHz
Greater than 70 at any requency rom 20Hz to 20kHz
Impedance Actual Output
Less than 0.06 ohms at any requency rom 20Hz to 1kHz
Less than 0.12 ohms at any requency rom 20Hz to 20kHz
Hum and Noise
110dB below rated output (20Hz — 20kHz)
115dB below rated output (IHF-A weighted)
Rise Time
10 microseconds, or better (10% -90% o 1 volt at 1kHz
square wave output)
Slew Rate
10 volts per microsecond, or better (at 50 watts into 8-ohm,
200kHz square wave input)
Phase Shift
20Hz to 20kHz, ±15 degrees
Offset Volta e
Less than ±10mV DC
Input Connectors
One "male" and one " emale" XLR connector in parallel,
pin 2 "cold", pin 3 "hot", and pin 1 "shield". XLR's are
unbalanced and parallel to two tip-sleeve (standard)
phonejacks.
Accessory Socket
8-pin octal socket accepts an optional matching trans-
ormer module or balanced input, or user options (pins
include ±VCC, signal input/output and circuit ground)
Output Connectors
Barrier Strip Terminal
Ground Terminal Strip
2 lug terminal block with removal shorting strap
Indicators
Green LED or signed presence
Red LED or output clipping
Red LED or circuit protection and thermal warning
Green LED or power ON.
Specifications (P-150M)
Controls
Input Attenuator
22-position, log-linear, detented and dB-calibrated input
attenuator attenuates input signal in 2dB steps rom 0dB
attenuation to -34dB, then in steps o -37dB, -42dB,
-50dB, in inity.
Circuit Breaker AC Switch
Accessory Switch (IN/OUT)
Bypass or octal socket
Overall Protection
AC line is protected by circuit breaker.
Protection LED lash when heat sink temperature reaches
more than 105°C.
Protection LED come on when the relay is activated by the
DC current low to output or by short circuit.
Turn On/Turn Off
No turn o transient. Three second delay turn on with
minimum thumps and no dangerous transients
AC Line Volta e
AC mains. 50Hz/60Hz
Power Consumption
400 watts maximum
Finish
Black painting
Dimensions (W×H×D)
483 × 133 × 475 (mm)
19 × 5-1/4 × 18-3/4 (inches)
Wei ht
18kg (40 lbs)
SPECIFICATION (TRANSFORMER OUTPUT)
Power Output
150 watts minimum sine wave continuous average power
output with either a 25-volt or 70-volt distribution system
over a power band rom 30Hz to 15kHz.
The maximum THD at any power level 250 milliwatts to
150 watts shall be not more than 0.6%.
Output Impedance
Designed or load impedances o 4.2-ohms (25 volts) or 33-
ohm (70 volts).
— 4 —

Specifications (P-300M)
(DIRECT OUTPUT)
Power Output
300 watts minimum sine wave continuous average power
output with 8-ohm loads over a power band rom 20Hz to
20kHz. The maximum Total Harmonic Distortion (THD)
at any power level rom 250 milliwatts to 300 watts shall
be not more than 0.1%.
480 watts minimum sine wave continuous average power
output with 4-ohm loads over a power band rom 20Hz to
20kHz. The maximum Total Harmonic Distortion (THD)
at any power level rom 250 milliwatts to 480 watts shall
be not more than 0.15%.
320 watts continuous average sine wave power into 8
ohms with less than 0.1% THD, at 1kHz.
Frequency Response
+0dB, -0.5dB, 20Hz to 20kHz
Total Harmonic Distortion
Less than 0.01% at 300 watts, 8-ohms, 1kHz
Less than 0.1% at 300 watts, 8-ohms, 20Hz to 20kHz
Intermodulation Distortion
0.05% using requencies o 60Hz and 7kHz, mixed in a ratio
o 4:1, at power output o 100 watts into 8-ohms
Input Sensitivity
An input o +4dB (1.23V), ±0.5dB, produces an output o
300 watts into 8-ohm, INPUT ATTENUATOR set or
maximum level
Input Impedance
10k-ohms (unbalanced)
Dampin Factor
Greater than 260 at any r equency r om 20Hz to 1kHz
Greater than 95 at any requency rom 20Hz to 20kHz
Impedance Actual Output
Less than 0.03 ohms at any requency rom 20Hz to 1kHz
Less than 0.08 ohms at any requency rom 20Hz to 20kHz
Hum and Noise
109dB below rated output (20Hz — 20kHz)
114dB below rated output (1HF-A weighted)
Rise Time
10 microseconds, or better (10% –90% o 1 volt at 1kHz
square wave output)
Slew Rate
10 volts per microsecond, or better (at 100 watts into 8-
ohm, 200kHz square wave input)
Phase Shift
20Hz to 20kHz, ±15 degrees
Offset Volta e
Less than ±10mV DC
Input Connectors
One "male" and one " emale" XLR connector in parallel,
pin 2 "cold", pin 3 "hot", and pin 1 "shield". XLR's are
unbalanced and parallel to two tip-sleeve (standard)
phonejacks.
Accessory Socket
8-pin octal socket accepts an optional matching
trans ormer module or balanced input, or user options
(pins include ±VCC, signal input/output and circuit
ground)
Output Connectors
Barrier Strip Terminal
Ground Terminal Strip
2 lug terminal block with removal shorting strap
Indicators
Green LED or signal presence
Red LED or output clipping
Red LED or circuit protection and thermal warning
Green LED or power ON
Controls
Input Attenuator
22-position, log-linear, detented and dB-calibrated input
attenuator attenuates input signal in 2dB steps rom 0dB
attenuation to -34dB, then in steps o -37dB, -42dB,
-50dB, in inity.
Circuit Breaker AC Switch
Accessory Switch (IN/OUT)
Bypass or octal socket
Overall Protection
AC line is protected by circuit breaker.
Protection LED lash when heat sink temperature reaches
more than 105°C.
Protection LED come on when the relay is activated by the
DC current low to output or by short circuit.
Turn On/Turn Off
No turn o transient. Three second delay turn On with
minimum thumps and no dangerous transients
AC Line Volta e
AC mains. 50Hz/60Hz
Power Consumption
850 watts maximum
Finish
Black painting
Dimensions (W×H×D)
483 × 222 × 475 (mm)
19 × 8-3/4 × 18-3/4 (inches)
Wei ht
28kg (62 lbs)
SPECIFICATION (TRANSFORMER OUTPUT)
Power Output
300 watts minimum sine wave continuous average power
output with either a 25-volt or 70-volt distribution system
over a power band rom 30 Hz to 15kHz.
The maximum THD at any power level rom 250
milliwatts to 300 watts shall be no more than 0.5%.
Output Impedance
Designed or load impedances o 2.1-ohms (25 volts) or 16-
ohms (70 volts).
— 5 —

Performance Graphs (P-150M)
P-150M DIRECT OUTPUT
POWER BANDWIDTH POWER OUTPUT vs LOAD IMPEDANCE
FREQUENCY RESPONSE
T.H.D. vs FREQUENCY T.H.D vs POWER OUTPUT
INTERMODULATION DISTORTION
VS POWER OUTPUT
MEASURED WITH A 4 : 1 MIX AT 60Hz and 7kHz
DAMPING FACTOR vs FREQUENCY
AT 8 LOAD IMPEDANCE
ACTUAL OUTPUT IMPEDANCE
vs FREQUENCY
PHASE RESPONSE
— 6 —

P-150M TRANSFORMER OUTPUT
T.H.D. vs FREQUENCY
T.H.D. vs POWER OUTPUT (at 1kHz)
FREQUENCY RESPONSE
POWER CONSUMPTION POWER EFFICIENCY
Performance Graphs (P-150M)
— 7 —

Performance Graphs (P-300M)
P-300M DIRECT OUTPUT
POWER BANDWIDTH
POWER OUTPUT vs LOAD IMPEDANCE FREQUENCY RESPONSE
T.H.D. vs FREQUENCY T.H.D vs POWER OUTPUT
INTERMODULATION DISTORTION
VS POWER OUTPUT
MEASURED WITH A 4 : 1 MIX AT 60 Hz and 7 kHz
DAMPING FACTOR vs FREQUENCY
AT 8 LOAD IMPEDANCE
ACTUAL OUTPUT IMPEDANCE
vs FREQUENCY
PHASE RESPONSE
— 8 —

P-300M TRANSFORMER OUTPUT
T.H.D. vs FREQUENCY
T.H.D. vs POWER OUTPUT (at 1kHz)
FREQUENCY RESPONSE
POWER CONSUMPTION
POWER EFFICIENCY
Performance Graphs (P-300M)
— 9 —

Front Panel
P-150M
P-300M
Input Attenuator
Calibrated in dB, detented input attenuator decrease input signal levels be ore the ampli ier stage.
Power Indicator LED
The green LED glows when the power switch is "on".
Si nal Presence Indicator LED
The LED glows when a signal greater than -30dB is ed to the input regardless o the input attenuator
setting and output power level.
Peak Indicator LED
The LED glows when the output signal is clipped. In such a case, lower the input attenuator level.
Protection Indicator LED
This LED remains lit or 3 seconds a ter the power switch has been turned on. It also comes on when the
protection circuit is activated, and lashes when the temperature o the heat sink exceeds 105°C.
Circuit Breaker Power Switch
This is a combined switch o circuit breaker and a power mains ON/OFF switch. I the circuit breaker
trips, it may be reset by irst setting to the "OFF" position and then returning to the "POWER ON"
position. Always check the ampli ier and associated wiring be ore resetting the circuit breaker.
— 10 —

Rear Panel
P-150M
P-300M
Input connectors
The two XLR input connectors are unbalanced and wired parallel to each other with two phone jacks that
can accept both a tip/sleeve and a tip/ring/sleeve type o plug.
Accessory
To convert the XLR input connectors to balanced operation, remove the octal socket cover and insert the
matching trans ormer (PU-101T). Then loosen the screw and set the In/Out switch to "In" a ter removing
the L-shaped metal itting. You can prevent accidental change in switch position by attaching the metal
itting to the OUT side.
Output Connectors
Barrier strip terminals are provided or output connections o amp out (more than 4 ohms), 25-volt and 70-
volt distribution systems. When applying the amp out, remove the U-shaped jumper on the strip
terminals.
Ground Terminal Strip
Remove the strap to isolate chassis ground rom signal ground. This may help prevent any ground loop
hums caused by multiple ground paths.
AC Power Cord.
— 11 —

Input/Output Connections
P-150M Typical Hookup
All XLR type connectors are unbalanced connec-
tion.
The pins 1 and 2 are ground (shield) the pin 3 hot
(high, plus).
All phone jacks are unbalanced connection.
• Low Impedance Loud Speaker Hookup
Remove U-shaped Jumper
• Balanced Input Connection
BALANCED SIGNAL
FROM PREAMPLIFIER,
MIXER, ETC.
25 Volt Distribution System
With PU-101T
The pin 1 ground (shield)
The pin 2 cold (low, minus)
The pin 3 hot (high, plus)
The total impedance should be
more than 4.2 ohms
UNBALANCED SIGNAL
FROM PREAMPLIFIER
MIXER, ETC.
OPTIONAL INPUT TRANSFORMER
model PU-101T
UNBALANCED SIGNAL
FROM PREAMPLIFIER
MIXER, ETC.
4~16 ohm
— 12 —

P-150M Typical Hookup
70 Volt Distribution System
Input/Output Connections
UNBALANCED SIGNAL
FROM PREAMPLIFIER
MIXER, ETC.
P-300M Typical Hookup
All XLR type connectors are unbalanced
connection. The pins 1 and 2 are ground
(shield) the pin 3 hot (high, plus)
All phone jacks are unbalanced connection.
Low Impedance Loud Speaker Hookup
UNBALANCED SIGNAL
FROM PREAMPLIFIER
MIXER, ETC.
Balanced Input Connection
BALANCED SIGNAL
FROM PREAMPLIFIER,
MIXER, ETC.
With PU-101T
The pin 1 ground (shield)
The pin 2 cold (low, minus)
The pin 3 hot (high, plus)
OPTIONAL INPUT TRANSFORMER
model PU-101T
Remove U-shaped Jumper
The total impedance should be
more than 33 ohms
4~16 ohm
— 13 —

70 Volt Distribution System
UNBALANCED SIGNAL
FROM MIXER,
PREAMPLIFIER, ETC.
FROM MIXER,
PREAMPLIFIER, ETC.
UNBALANCED SIGNAL
The total impedance should be more
than 16 ohms
The total impedance should be
more than 2.1 ohms
P-300M Typical Hookup
25 Volt Distribution System
Input/Output Connections
— 14 —

Installation Precaution
Input and output cables
In view o high power output produced, separate the input cable rom the output cable when
installing the P-150M or P-300M. I they are in close proximity to each other, oscillation may occur.
Particular care should be given to the wiring when mounting unit in a rack cabinet.
Ground Loop
In any audio system, there are numerous ways by which ground loops can be created. For example,
they may occur when the P-150M and P-300M are mounted in a rack cabinet, or through AC ground
when the amps are connected with preamps and mixers. These ground loops may cause hum and
noise i care is not taken during connection. An increase in noise rom ground loops may be
minimized by breaking the ground loop. Generally, the chassis ground o the signal line should be
broken as shown below.
Main AC Ground
When a Y cord is used, shorten the wiring to minimize noise.
A ground li t terminal is provided on the rear o the P-150M and P-300M. Removing the bar in the
terminals li ts ground.
Since the P-150M and P-300M are high power ampli iers, be care ul with ventilation when they are
installed. Do not block vents on the top panel. See sketch.
Rack Cabinet
Path o
ground
Loop
— 15 —

On the road use.
The P-150M and P-300M are sturdily constructed with an aluminum die-cast ront panel that is
rein orced by means o an iron plate attached to its back. To ensure that strength is maintained
during their transportation rom one place to another, however, you should also rein orce each unit
rom the back o the rack with a special support bracket. This can be accomplished by removing
cord-hangers on the rear panel, and screws that hold the rear panel to chassis, and itting the special
support brackets through the holes.
Mountin in an enclosed rack cabinet
The P-150M and P-300M are mountable in a standard 19" rack. When mounting, insert a 1-unit-sized
per orated panel between the units mounted, and place the same at the bottom o the rack. Be sure to
mount a per orated panel larger than 1 unit size at the top o the rack. This is required to allow
adequate heat ventilation. See illustration.
Installation Precaution
P-150M, P-300M
P-150M, P-300M
Special support bracket
Top view
Side view
— 16 —

Installation Precaution
Source Resistance and Dampin Factor vs. Len th and Size of Output
Leads
The ollowing igure indicates that a 100 oot length o # 14 AWG annealed copper wire (two
conductor) yields a combined ampli ier/cable source impedance o 0.5 ohms. A typical 8 ohms load
impedance is indicated, and this results in an e ective damping actor o 15. (This damping actor is
less than the rated one o each model obtained with zero ohms cable resistance). Larger diameter
(lower wire gauge number) should be used or longer cable.
Load Protection Methods
The most common o all load protection methods
is a use in series with the load. The use may be
single, using the overall system, or (in the case o
multi-element speaker systems), may be multiple
with one use or each speaker. Fuses help prevent
damage due to prolonged overload, but provide
essentially no protection against damage that may
be done by large transients. To minimize the
problem, high speed instrumentation uses are
recommended. For a nomograph showing use size
vs. loudspeaker ratings, re er to the ollowing
igure.
— 17 —

Primary windings o certain trans ormers are rated in ohms instead o watts. To select a trans ormer
or a speci ic power level, the ollowing ormula can be used:
where Z is the impedance o the primary winding o the trans ormer (ohms)
E is the constant voltage level o the system
P is the desired power (watts)
For a 70 volt system, where 5 watts are desired at a particular speaker, the primary winding o the
trans ormer must have an impedance o :
A constant voltage distribution system is a method o connecting loudspeakers to an ampli ier where
the output voltage o the ampli ier and the amount o power delivered to loudspeakers remain
constant.
A constant voltage distribution system is similar to a power generating station that delivers
electrical power to your home. Just as appliances can be turned on and o without a ecting the
operation o other appliances connected to the electrical system, speakers can be added to, or
subtracted rom, the distribution system without a ecting its overall operation. However, the total
number o speakers connected to the ampli ier is limited by the ampli ier output power capability.
The most common voltages used in a constant voltage distribution are 25 volts and 70 volts. In most
areas o the USA, 70 volts is the maximum voltage that a pair o wires may carry without being
enclosed in metal conduit. An ampli ier that is designed or use is such a system that must
develop 70 volts across the output terminal when driven to its ull rated power. Actually, the
output o the ampli ier swings rom 0 to 70 volts in response to changes in its input signal.
In a constant voltage distribution system, "Pre-Packages" speakers with matching trans ormers
with several taps are normally utilized. (Each tap is designated in watts.) You may simply connect
the output terminal o the ampli ier to the tap o the power rating desired. However, i speakers
without trans ormers are selected, the correct trans ormers must be care ully chosen to match the
speakers. Trans ormers are usually designed or a speci ic constant voltage level (i.e. 70 volts and 25
volts), and have primary winding taps rated in watts, and secondary winding taps rated in ohms.
They may have several primary and secondary winding taps.
Primary windings o the trans ormer are connected in parallel across the output terminals o the
ampli ier, while secondary windings are connected across a loudspeaker or loudspeaker system.
Secondary winding taps are chosen to match the impedance o the loudspeaker. Primary winding
taps should be selected to match the power that a speaker receives. An ampli ier's output voltage will
determine the power delivered to a speaker.
Trans ormers are connected in parallel across the output terminals o the ampli ier.
25/70 Volt Distribution Systems
Note: 70
2
is approximately 5000
— 18 —

25/70 Volt Distribution Systems
Two important actors must be considered when setting up a constant voltage distribution system.
1. The rated power o an ampli ier must be higher than the total power that the speakers receive.
2. The total impedance o the speaker system must be kept above the minimum value to ensure
constant voltage operation. This impedance can be calculated by the ollowing ormula:
where Z is the total impedance o the speaker system (ohms)
E is the output voltage o the amp at ull power
P is the ull rated power o the ampli ier (watts)
For a 50-watt ampli ier to power a 70 volt system, the minimum impedance is:
CONSTANT VOLTAGE LINES
WATTS VS OHMS VS VOLTS
To use chart you will have two o the known values: ohm, volts or watts. On the irst horizontal line
select one known value-watts, constant volts or resistance. Then move down the column until you
ind the second known value. Then move horizontally to the unknown value.
Example 1 70V constant line and 49 ohms = 100 watts
Example 2 16 ohms and 60 volts = 225 watts
E = volts
P= watts
R = resistance
E
P
R
(70)
2
is approximately 5000
WATTS
25
50
75
100
125
150
175
200
225
250
300
400
500
600
700
750
800
25V
25.0
12.5
8.33
6.25
5.00
4.17
3.57
3.13
2.78
2.50
2.08
1.56
1.25
1.04
0.89
0.83
0.78
70V
196.0
98.0
65.3
49.0
39.2
32.7
28.0
24.5
21.8
19.6
16.3
12.3
9.8
8.2
7.0
6.5
6.1
100V
400.0
200. 0
133.3
100.0
80.0
66.7
57.1
50.0
44.4
40.0
33.3
25.0
20.0
16.7
14.3
13.3
12.5
10.0
14.1
17.3
20.0
22.4
24.5
26.5
28.3
30.0
31.6
34.6
40.0
44.7
49.0
53.0
54.8
56.6
14.1
20.0
24.5
28.3
31.6
34.6
37.4
40.0
42.4
44.7
49.0
56.6
63.3
69.3
74.8
77.5
80.0
20.0
28.3
34.6
40.0
44.0
49.0
52.9
56.6
60.0
63.3
69.3
80.0
89.5
98.0
105.8
109.5
113.1
Ohms Volts
— 19 —