Data set 01
1960 Mazda
Published operating points and test conditions from this source.
SECTION 1
Triode
Other
Maximum heater-cathode voltage
200 V
Voltage Radio Detector Converter ·Pentode-Triode
30C15
VHF triode-pentode frequency changer for AC/DC television receivers.
Directly heatedCold cathodeCommon cathodeDissimilar
- Sections
- 2
- Base
- B9A
- Socket code
- B9A
- Base pins
- 9
- Nominal heater
- 9 V / 300 mA
Description
VHF triode-pentode frequency changer for AC/DC television receivers. The supplied English-language Mazda/Thorn-AEI datasheet was used for the technical and descriptive extraction.
Socket description
Small-button Noval 9-contact
General specifications
Tube and section characteristics
Properties common to every published source and operating point.
Heater and base
- Base
- B9A
- Socket code
- B9A
- Base pins
- 9
- Nominal heater voltage
- 9 V
- Nominal heater current
- 300 mA
- Parallel heater voltage
- -
- Parallel heater current
- -
- Series capable
- No
B9A - Terminal pinout
Electrical assignments shared by every tube using this base designation.
No verified pinout is recorded for this base designation.
Section ratings
2 physical sections, each with unique specifications.
Section 1
Triode
X-ray radiationInterelectrode capacitances
- Transconductance
- 0.005 S
- Amplification factor
- 20
- Max plate voltage
- 250 V
- Max plate dissipation
- 1.5 W
- Max cathode current
- 14 mA
Published ratings and characteristics promoted where clearly stated; identical repeated sections compressed when applicable.
Section 2
Pentode
X-ray radiationInterelectrode capacitances
- Transconductance
- 0.0085 S
- Amplification factor
- 55
- Max plate voltage
- 250 V
- Max screen voltage
- 175 V
- Max plate dissipation
- 1.7 W
- Max screen dissipation
- 0.5 W
- Max cathode current
- 14 mA
Published ratings and characteristics promoted where clearly stated; identical repeated sections compressed when applicable.
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
1973 Mazda Valves Binder 2
Published operating points and test conditions from this source.
SECTION 1
Triode
Other
Heater Current Ih
3 A
Heater Voltage Vh
90 V
Maximum Anode Dissipation Pa(max) 1.5
1.7 W
Maximum Screen Dissipation Pg2(max)
0.5 W
Maximum Anode Voltage Va(max) 250
250 V
Maximum Screen Voltage Vg2(max)
175 V
Maximum Heater to Cathode Voltage (RMS) Vh-k(r.m.s.)max
200 V
Maximum Cathode Current Ik(max) 15
14 mA
Supply Voltage Vb
200 V
Characteristic
Grid 1 to all cin(p) 66 68
7.7 pF
Anode Pentode to all cout(p) 46 4.9
5.9 pF
Anode Pentode to Grid 1 cap-g1 0 013 0017
2 pF
Grid 1 to Grid 2 cg1_g2 23 23
23 pF
Grid Triode to Earth cgt-E 28 30
38 pF
Anode Triode to Earth cat-E 27 29
3.7 pF
Anode Triode to Grid Triode cat-gt 16 17
18 pF
Anode Triode to Anode Pentode cat-ap 0 016 0 022 0
26 pF
Anode Pentode to Grid Triode ca p-gt 0 003 0 005
0.006 pF
Grid 1 to Grid Triode cg1-gt 0 012 002
4 pF
Grid 1 to Anode Triode cg1-at 0 006 001 0
15 pF
Anode Voltage Va 100
170 V
Screen Voltage Vg2 —
170 V
Anode Current la 15
10 mA
Mutual Conductance gm 6
9 mA
Anode Voltage (Decoupling resistance=4 7kQ) Va
164 V
Screen Voltage (Rg2=27kf2) Vg2
138 V
Conversion Conductance gc
3.3 mA
Heterodyne Peak Voltage vhet(pk)
37 V
Anode Current (Approximate) la
76 mA
Screen Current (Approximate) Ig2
2.3 mA
Anode Voltage Va
120 V
Average Anode Current la(av)
6 mA