Data set 01
1961 Tung Sol
Published operating points and test conditions from this source.
SECTION 1
Cathode Ray
Capacitance
Heater Cathode Capacitance
5 pF
Approximate
Specialized - Cathode Ray ·CathodeRay
27LP4
Twenty-seven-inch direct-view monochrome television picture tube with magnetic deflection and high-voltage operation. Manufacturer documentation provides focusing, optical, and electrical characteristics for large-screen receiver display service.
Directly heatedCold cathodeCommon cathodeDissimilarSpecialized
- Sections
- 1
- Base
- 12N
- Socket code
- DUODECAL5
- Base pins
- 12
- Nominal heater
- 6.3 V / 600 mA
Description
Direct-view cathode-ray picture tube intended for television display service. The supplied Tung-Sol datasheet provides electrical ratings, operating conditions, capacitances, optical characteristics, focusing and deflection information. Features an aluminized screen where specified by this designation.
Socket description
Small-shell Duodecal 5-contact CRT base
General specifications
Tube and section characteristics
Properties common to every published source and operating point.
Heater and base
- Base
- 12N
- Socket code
- DUODECAL5
- Base pins
- 12
- Nominal heater voltage
- 6.3 V
- Nominal heater current
- 600 mA
- Parallel heater voltage
- -
- Parallel heater current
- -
- Series capable
- No
12N - Terminal pinout
Electrical assignments shared by every tube using this base designation.
No verified pinout is recorded for this base designation.
Section ratings
1 physical section, each with unique specifications.
Section 1
Cathode Ray
X-ray radiationInterelectrode capacitances
- Max plate voltage
- 22000 V
- Max screen voltage
- 0 V
Direct-view television CRT; high-voltage electrode rating mapped to MaxPlateVoltage as the section high-voltage limit.
Source-dependent data
Operating conditions by source
Each block preserves the test conditions and published values from one reference. Values from different sources are intentionally kept separate.
Data set 02
1966 Tung Sol Electronic Tubes 4 of 4
Published operating points and test conditions from this source.
SECTION 1
Cathode Ray
Characteristics
MAGNETIC FOCUS AND DEFLECTION
10
Published CRT datasheet value; multiple values on one source row represent separate conditions, limits, or nominal values.
DIRECT INTERELECTRODE CAPACITANCES (APPROX.)
1
Published CRT datasheet value; multiple values on one source row represent separate conditions, limits, or nominal values.
GRID #i TO ALL OTHER ELECTRODES — value 1
1
Published CRT datasheet value; multiple values on one source row represent separate conditions, limits, or nominal values.
GRID #i TO ALL OTHER ELECTRODES — value 2
0
Published CRT datasheet value; multiple values on one source row represent separate conditions, limits, or nominal values.
MINIMUM EXTERNAL CONDUCTIVE COATING TO ANODE
0
Published CRT datasheet value; multiple values on one source row represent separate conditions, limits, or nominal values.
PHOSPHOR NUMBER
4
Published CRT datasheet value; multiple values on one source row represent separate conditions, limits, or nominal values.
HEATER VOLTAGE
6.3 V
Published CRT datasheet value; multiple values on one source row represent separate conditions, limits, or nominal values.
HEATER CURRENT
0 mA
Published CRT datasheet value; multiple values on one source row represent separate conditions, limits, or nominal values.
HEATER POSITIVE WITH RESPECT TO CATHODE — value 1
1 V
Published CRT datasheet value; multiple values on one source row represent separate conditions, limits, or nominal values.
HEATER POSITIVE WITH RESPECT TO CATHODE — value 2
0 V
Published CRT datasheet value; multiple values on one source row represent separate conditions, limits, or nominal values.
DC ANODE S GRID #3 VOLTAGE — value 1
3 V
Published CRT datasheet value; multiple values on one source row represent separate conditions, limits, or nominal values.
DC ANODE S GRID #3 VOLTAGE — value 2
20000 V
Published CRT datasheet value; multiple values on one source row represent separate conditions, limits, or nominal values.
DC GRID #2 VOLTAGE — value 1
2 V
Published CRT datasheet value; multiple values on one source row represent separate conditions, limits, or nominal values.
DC GRID #2 VOLTAGE — value 2
300 V
Published CRT datasheet value; multiple values on one source row represent separate conditions, limits, or nominal values.
DC GRID #1 VOLTAGE S — value 1
1 V
Published CRT datasheet value; multiple values on one source row represent separate conditions, limits, or nominal values.
DC GRID #1 VOLTAGE S — value 2
33 V
Published CRT datasheet value; multiple values on one source row represent separate conditions, limits, or nominal values.
DC FOCUSING COIL CURRENT (APPROX.)
14 mA
Published CRT datasheet value; multiple values on one source row represent separate conditions, limits, or nominal values.
ION TRAP MAGNET FIELD INTENSITY — value 1
10
Published CRT datasheet value; multiple values on one source row represent separate conditions, limits, or nominal values.
ION TRAP MAGNET FIELD INTENSITY — value 2
1
Published CRT datasheet value; multiple values on one source row represent separate conditions, limits, or nominal values.
ION TRAP MAGNET FIELD INTENSITY — value 3
45
Published CRT datasheet value; multiple values on one source row represent separate conditions, limits, or nominal values.
BVI SU AL EXTINCTION OF UNDEFL EC TEO FOCUSED SPOT.
0
Published CRT datasheet value; multiple values on one source row represent separate conditions, limits, or nominal values.
Other
MAXIMUM EXTERNAL CONDUCTIVE COATING TO ANODE
400
Published CRT datasheet value; multiple values on one source row represent separate conditions, limits, or nominal values.
MAXIMUM DC ANODE S — value 1
3 V
Published CRT datasheet value; multiple values on one source row represent separate conditions, limits, or nominal values.
MAXIMUM DC ANODE S — value 2
22000 V
Published CRT datasheet value; multiple values on one source row represent separate conditions, limits, or nominal values.
MAXIMUM DC GRID #2 VOLTAGE — value 1
2 V
Published CRT datasheet value; multiple values on one source row represent separate conditions, limits, or nominal values.
MAXIMUM DC GRID #2 VOLTAGE — value 2
0 V
Published CRT datasheet value; multiple values on one source row represent separate conditions, limits, or nominal values.
MAXIMUM GRID #i VOLTAGE
1 V
Published CRT datasheet value; multiple values on one source row represent separate conditions, limits, or nominal values.
MAXIMUM GRID #i CIRCUIT RESISTANCE — value 1
1 Mohm
Published CRT datasheet value; multiple values on one source row represent separate conditions, limits, or nominal values.
MAXIMUM GRID #i CIRCUIT RESISTANCE — value 2
1 Mohm
Published CRT datasheet value; multiple values on one source row represent separate conditions, limits, or nominal values.