A1714

Low-noise planar triode for RF oscillator and amplifier service, characterized around 45 MHz.

Directly heatedCold cathodeCommon cathodeDissimilar

Description

The A1714 is a low-noise planar triode for radio-frequency oscillator and amplifier service, with characteristics specified around 45 MHz.

General specifications

Properties common to every published source and operating point.

Electrical assignments shared by every tube using this base designation.

No verified pinout is recorded for this base designation.

1 physical section, each with unique specifications.

Section 1

X-ray radiationInterelectrode capacitances

Planar VHF/UHF triode.

Source-dependent data

Each block preserves the test conditions and published values from one reference. Values from different sources are intentionally kept separate.

Data set 01

Published operating points and test conditions from this source.

SECTION 1

Noise factor*
2
Noise factor* 2 db
Teq noise ref gl
500
Teq noise ref gl 500
cg-k (heater earthed) [1]
22
cg-k (heater earthed) 22 3-6 pF
cg-k (heater earthed) [2]
3
cg-k (heater earthed) 22 3-6 pF
cg-k (heater earthed) [3]
-6
cg-k (heater earthed) 22 3-6 pF
Cg-all (less anode) [1]
2
Cg-all (less anode) 2:25 4-0 pF
Cg-all (less anode) [2]
25
Cg-all (less anode) 2:25 4-0 pF
Cg-all (less anode) [3]
4
Cg-all (less anode) 2:25 4-0 pF
Cg-all (less anode) [4]
0
Cg-all (less anode) 2:25 4-0 pF
Ca-k (heater earthed) [1]
0
Ca-k (heater earthed) 0-065 — pF
Ca-k (heater earthed) [2]
-65
Ca-k (heater earthed) 0-065 — pF
The circuit of fig
1
The circuit of fig. 1 will give good signal-to-noise ratio at frequencies of the order of
capacitors “ C " are of the feed-through type. For a frequency of
500 MHz
capacitors “ C " are of the feed-through type. For a frequency of 500 Mc/s the induct-
outputs at frequencies up to
1000 MHz
outputs at frequencies up to 1,000 Mc/s.

Data set 02

Published operating points and test conditions from this source.

SECTION 1

up to
1000 MHz
up to 1000 Mc/s or as a low noise amplifier at frequencies up to about
300 MHz
Vh-k(pk)
90 V
MAXIMUM RATINGS (Design centre)
rin (
45 MHz
a subsidiary of THE GENERAL ELECTRIC CO LTD OF ENGLAND
cg-all (
45 MHz
a subsidiary of THE GENERAL ELECTRIC CO LTD OF ENGLAND
cg-all (45 Mc/s)
5 pF
a subsidiary of THE GENERAL ELECTRIC CO LTD OF ENGLAND
Noise factor (
45 MHz
a subsidiary of THE GENERAL ELECTRIC CO LTD OF ENGLAND
Noise factor (45 Mc/s)
1.9 dB
a subsidiary of THE GENERAL ELECTRIC CO LTD OF ENGLAND