17GT5

A nine-pin Novar beam-power pentode for television horizontal-deflection output stages, incorporating a 16.8-volt, 450-milliampere heater with controlled warm-up. It offers high-voltage pulse capability, 17.5-watt maximum plate dissipation, and efficient operation in demanding television line-sweep amplifier circuits.

Directly heatedCold cathodeCommon cathodeDissimilar

Sections: 1
Base: 9NZ
Socket code: -
Base pins: 9
Nominal heater: 16.8 V / 450 mA

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: 9NZ
Socket code: -
Base pins: 9
Nominal heater voltage: 16.8 V
Nominal heater current: 450 mA
Parallel heater voltage: -
Parallel heater current: -
Series capable: No

9NZ - Terminal pinout

Electrical assignments shared by every tube using this base designation.

Terminal	Section	Connection	Evidence
PIN1Base Pin	—	G2 — Screen Grid Literal chart label G2; manufacturer confirmation pending	Unverified EIA Base Connections printed p134, 9NZ
PIN2Base Pin	—	G1 — Control Grid Literal chart label G1; manufacturer confirmation pending	Unverified EIA Base Connections printed p134, 9NZ
PIN3Base Pin	—	G3 — Suppressor GridGroup 9NZ3 Literal chart label G3; manufacturer confirmation pending	Unverified EIA Base Connections printed p134, 9NZ
PIN3Base Pin	—	K — CathodeGroup 9NZ3 Literal chart label K; manufacturer confirmation pending	Unverified EIA Base Connections printed p134, 9NZ
PIN4Base Pin	—	H — Heater Literal chart label H; manufacturer confirmation pending	Unverified EIA Base Connections printed p134, 9NZ
PIN5Base Pin	—	H — Heater Literal chart label H; manufacturer confirmation pending	Unverified EIA Base Connections printed p134, 9NZ
PIN6Base Pin	—	G1 — Control Grid Literal chart label G1; manufacturer confirmation pending	Unverified EIA Base Connections printed p134, 9NZ
PIN7Base Pin	—	G2 — Screen Grid Literal chart label G2; manufacturer confirmation pending	Unverified EIA Base Connections printed p134, 9NZ
PIN8Base Pin	—	IC Literal chart label IC; manufacturer confirmation pending	Unverified EIA Base Connections printed p134, 9NZ
PIN9Base Pin	—	P — Plate (Anode) Literal chart label P; manufacturer confirmation pending	Unverified EIA Base Connections printed p134, 9NZ

Section ratings

1 physical section, each with unique specifications.

Section 1

Beam Power

X-ray radiationInterelectrode capacitances

Plate resistance: 15000 Ω
Transconductance: 0.0071 S
Amplification factor: 4.4
Max plate voltage: 770 V
Max screen voltage: 220 V
Max plate dissipation: 17.5 W
Max screen dissipation: 3.5 W
Max cathode current: 550 mA

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 01

1970 Sylvania Technical Manual

Published operating points and test conditions from this source.

SECTION 1

Beam Power

Characteristics

Plate Voltage
250 V
Screen Voltage
150 V
Grid Bias
-22.5 V
Plate Current
70 mA
Screen Current
2.1 mA

Other

Peak positive pulse plate voltage
6500 V
peak positive plate voltage; Sylvania 1970
Peak negative pulse plate voltage
-1500 V
peak negative plate voltage; Sylvania 1970
Average cathode current
175 mA
average cathode maximum; Sylvania 1970
Peak cathode current
550 mA
peak cathode maximum; Sylvania 1970
Heater warm-up time
11 s
heater warmup; Sylvania 1970
Grid #1 voltage
-42 V
cutoff Ib1mA; Sylvania 1970
Plate voltage
60 V
knee plate voltage; Sylvania 1970
Plate current
390 mA
knee plate current; Sylvania 1970
Grid #2 current
32 mA
knee screen current; Sylvania 1970
Bulb Temperature (At hottest point)
240 degC
max bulb temperature; Sylvania 1970
Peak Heater-Cathode Voltage
200 V
heater negative DC+peak; Sylvania 1970
Peak Heater-Cathode Voltage
100 V
heater positive DC; Sylvania 1970
Peak Heater-Cathode Voltage
200 V
heater positive DC+peak; Sylvania 1970

Capacitance

Grid-to-plate capacitance
0.26 pF
grid-plate capacitance; Sylvania 1970
Input capacitance
15 pF
input capacitance; Sylvania 1970
Output capacitance
6.5 pF
output capacitance; Sylvania 1970