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Labworks PA-141 Linear Power Amplifier
The Labworks PA-141 Linear Power Amplifier is
a high quality, air-cooled, direct-coupled audio amplifier primarily
intended for use with vibration systems. Although this amplifier has been
designed to directly drive low impedance loads, it can be used in any
application requiring continuous duty, high quality, audio power.
There are two operational modes. The
amplifier can be used as either a wide-band, highly damped voltage source,
or as a high impedance current source. DC and AC coupled signal inputs are
provided.
Features:
-
Linear output stage provides low noise
and distortion.
-
Automatic over temperature and over
current protection.
-
Direct coupled input and output allows DC
operation.
-
External interlock circuitry.
-
Two operational modes, voltage or current
source.
-
Optional internal shaker field supplies.
| Output
Voltage (continuous) |
| |
10
Hz to 20 KHz |
| |
open
circuit |
62.0
V rms |
| |
4Ω
load |
49.0 |
| |
2Ω
load |
40.0 |
| |
1Ω
load |
20.0 |
| |
DC
to .1 Hz |
| |
open
circuit |
87.5
Vdc/pk |
| |
4Ω
load |
69.0 |
| |
2Ω
load |
56.5 |
| |
Ω
load |
28.0 |
| Random
Voltage Output |
| |
2.5
sigma peak volts |
| |
open
circuit |
36.0
V rms |
| |
4Ω
load |
30.0 |
| |
2Ω
load |
28.0 |
| |
1Ω
load |
20.0 |
| |
3.0
sigma peak volts |
| |
open
circuit |
30.0
V rms |
| |
4Ω
load |
25.0 |
| |
2Ω
load |
23.0 |
| |
1Ω
load |
20.0 |
| Maximum
continuous dissipation |
| |
Ambient
Temp = |
40°C
50
60 |
900W
450
0 |
| Frequency
response (DC coupled input) |
| |
DC
to 10 KHz |
-0.6
dB |
| |
DC
to 20 KHz |
-2.5 |
| |
AC
coupling @ 1.0 Hz |
-0.5 |
| Slew
rate |
6.0
V/msec |
| Harmonic
distortion |
|
| |
(10V,
DC-10k) |
<0.65%
@ 1W |
| Signal/noise
ratio |
|
| |
(ref
50V out) |
100
dB minimum |
| Input
impedance |
| |
DC
coupled |
10
kΩ |
| |
AC
coupled |
47
uF in series with 10 kΩ |
| DC
offset |
| |
Voltage
mode |
5
mV max |
| |
Current
mode |
3
mA max |
| Voltage
mode gain |
96
(40 dB) max |
| Current
mode gain |
22
Amps/Volt max |
| Voltage
source regulation |
<0.1 dB ( ∞ - 2Ω load,
30 Hz/20 V rms) |
| Current
source regulation |
<0.1 dB (0-2Ω load,
30 Hz/10 A rms) |
| Front
panel metering |
| |
Type |
(2)
19 seg. horiz. bar graphs |
| |
Scale |
| |
Voltage |
0-72V
pk |
| |
Current |
0-20
A rms |
| |
Resolution |
| |
Peak
voltage |
5%
of full scale |
| |
True
rms current |
5%
of full scale |
| |
Accuracy
(voltage & current) |
±5%
absolute |
|
