Krohn-Hite Corporation DCA-10 Amplifier
Manufacturer:
Image 1 of 1
If you have any other photos or manuals for the
Krohn-Hite Corporation DCA-10 you can upload the files here .
Model:
DCA-10
Date:
0
Category:
Group:
Description:
WIDE-BAND · DC-1MC 10 WATT AMPLIFIER
Information
TECHNICAL SUMMARY
POWER OUTPUT: 10 volt-amperes (20 volt-ampere peaks},
continuous, from dc to 500 kc into a 1,000 ohm resistive or
reactive load; 10 watts (Z0 watt peaks}, continuous, from 1
cps to 1 me into a 600 ohm resistive load. See Note 2 on
Page 7 and Figure II.
OUTPUT VOLTAGE: Greater than 105 volts rms (300 volts peak
to peak) open circuit from dc to 1 me; 100 volts rms (280
volts peak to peak) across 1, 000 ohms from dc to 500 kc; 78
volts rms (218 volts peak to peak) across 600 ohms from I
cps to 1 me.
OUTPUT CURRENT: Above 1 cps, greater than 210 ma rms (£300
ma peak) through 10 ohms; 130 ma rms (±180 ma peak) through
600 ohms; 100 ma rms (±140 ma peak) through 1,000 ohms.
Below 1 cps, 42 ma rms (±60 ma peak) through 10 ohms; 52
marms.(afc75 mapeak) through 600 ohms; 100 ma rms (±140 ma
peak) through 1, 000 ohms,
OUTPUT REGULATION (from no load to full resistive load):
Less than 2% from 10 cps to 100kc, less than 5% over the
entire frequency range.
INTERNAL IMPEDANCE: Less than 10 ohms from 10 cps to 50 kc,
less than 50 ohms from dc to 100 kc and less than 100 ohms
above 100 kc.
LOAD IMPEDANCE: Matching, nominal 600 ohms from 1 cps to I
me; below 1 cps, 1, 000 ohms minimum load for full power
output. See Figure 8. Minimum load, 10 ohms. See Figure 10.
LOAD POWER FACTOR: Unity to zero, lagging or leading,
OUTPUT DC LEVEL: Zero volts at capacitor-coupled AC OUTPUT
terminals; nominal zero volts at the DC OUTPUT terminals.
OUTPUT DC LEVEL STABILITY {typical, after initial warm up,
expressed in per cent of peak output voltage): ±0. 02% in
any one-hour period at fixed line voltage and ±0. 2% for
±10% line voltage change in all positions of the INPUT
SELECTOR switch except the X1Ö DC and POT DC positions where
±0. 1% and ±1% apply,
VOLTAGE GAIN: Maximum of 10, variable continuously, fixed
gain of i0± 10% (20±1 db), or fixed gain of 1 ± 10% (0 ± 1
db) as determined by the INPUT SELECTOR switch. Less than
±0. 25 db change in gain for a 10% change in line voltage
within the operating range.
FREQUENCY RESPONSE; Flat within ±1 db from dc to 1 me under
all specified operating conditions; approximately 3 db down
at 2 me. See Figure 10.
PHASE SHIFT: Zero ±1 degree from dc to 10 kc in the XI0 and
POT positions of the INPUT SELECTOR switch. See Figure 13,
In the XI position the phase shift is 180 ±1 degrees.
HARMONIC DISTORTION (rms): At full power output, less than
0. 1% from 20 cps to 50 kc, less than 0. 5% from near dc to
100 kc and less than 3% above 100 kc. In the XI positions of
the INPUT SELECTOR switch the distortion is less than 5%
above 100 kc. See Figure 12.
DC linearity is within +1% with loads above 500 ohms.
HUM AND NOISE (referred to output): Less than 10 mv with the
input shorted and less than 20 mv with an open circuit input.
DYNAMIC RANGE: Approximately 80 db*
SQUARE WAVE RESPONSE: See Figure 9.
INPUT IMPEDANCE: Greater than 1 megohm in parallel with
approximately 50 uuf in the fixed gain positions; 5, 000
ohms in parallel with approximately 50 uuf in the variable
gain positions.
INPUT COUPLING: Either direct coupling or capacitor coupling
with a low cut-off frequency o£ 1 cps,_
INPUT SENSITIVITY: 7. 8 volts rms with a 600 ohm load and 10
volts rms with a I» 000 ohm load for 10 watts output at
maximum gain (XI0).
INPUT VOLTAGE LIMITS: 4.00 volt maximum dc component in the ac
coupled {1 CPS) fixed gain positions; combined input signal
voltages (ac and dc) must not cause more than 2 watts
dissipation in the
5, 000 ohm GAIN potentiometer in either variable gain position,
AMBIENT TEMPERATURE AND DUTY CYCLE; Continuous duty at full
10 watt output up to 5G°C (122°F) ambient.
FRONT PANEL CONTROLS:
INPUT SELECTOR switch.
GAIN control.
OUTPUT DC LEVEL control (screwdriver adjust).
POWER ON switch.
TERMINALS: Two multi-purpose binding posts for the INPUT
(signal and
ground)and three for the OUTPUT (DC signal, AC signal and
ground).
POWER REQUIREMENTS: 105-125 or 210-250 volts; single phase;
50-60 cycles; 250 watts.
FUSE PROTECTION:
Line: 2. 5 ampere slow-blow.
Plate supply: 3/16 ampere slow-blow.
TUBE COMPLEMENT (furnished with instrument): 2-6GT5, 2-6CL6,
1-6AQ5, 1-12AX7, 1-6AS7-GA, 1-6BK7-B, I-5R4-GYB.
FORM: Furnished in an attractively styled perforated steel
cabinet with a.
cast aluminum front panel and frame. Front panel finished in
gray enamel; frame and cabinet in blue enamel. Other
finishes available on special order. Over-all dimensions
Model DCA-IO: 7 I /Zu wide, 10” high, 15" deep. Weight 35
lbs. net, 40 lbs. shipping.
Manual type:
Service and User Manual
Pages:
64
Size:
3.22 Mbytes (3374568 Bytes)
Language:
english
Revision:
Manual ID:
Date:
Quality:
Scanned document, reading partly badly, partly not readable.
Upload date:
2015 09 06
MD5:
a818f75a8173212ab02a1e54e6c4b5ca
Downloads:
592
Information
OPERATING AMD MAINTENANCE MANUAL
1. Technical
Summary, ... 5
2,
Description ... 8
SECTION II - OPERATION
1. Controls. .
... *
. . . 9
2. Load
Impedance ... 10
3. Line
Voltage ... 10
4. Terminals
... 11
5. Test Jack Voltage and Output DC
Level ... 11
6. Fuses and Indicators.
...
. II
SECTION III - CIRCUIT DESCRIPTION
1. Input
Stage ... 12
Z, Driver Stage
... 13
3. Output
Stage ... 14
4. Over-all Feedback
Network ...
. 16
5. Input Selector
Switch ... 16
6. Stabilization
... 18
7. ' Power
Supply ... 19
SECTION IV - MAINTENANCE
1. Fuse Failure.
... 21
2. Tube Replacement. . .
, ... 22
3. Power supply
Description ... 23
4. Power supply Maintenance ...
... 24
5. Amplifier
Description ... 27
6. Amplifier Maintenance ...
... 28
7. Amplifier Gain vs.
Frequency ... 30
8. Air Filter
...
, ... 35
SECTION V - 500 HOUR
CHECK ... 35
SECTION VI - ACCEPTANCE AND PERFORMANCE TESTS ... 39
1. Power Output ...
... 41
2. Output
Regulation ... 42
3. Internal
Impedance ... 42
4. Output DC Level
Stability ... 43
5. Frequency
Response ... 43
6. Phase
Shift ... 43
7. Harmonic
Distortion ... 43
8. Hum and
Noise ... 47
9. Dynamic Range.
... 47
10. Square-Wave Response. .
... 48
SECTION VII - SERVICE AND
WARRANTY ... 48
SECTION VIII - TYPICAL PERFORMANCE
CURVES ... 49
SECTION IX - PARTS LIST ... .. . c?