Valve Bases - Eddystone Short Wave Manual

EDDYSTONE SHORT WAVE MANUAL 43
BASE CONNECTIONS FOR 4 Pim, 5 FIN s 7 PIN VALVES.
43
I
4 Fim
5 PIN.
4
Valve bases viewed Prom flee ends oP socket's.
NOTE :-
A - Anode
G,
Control Grid
Ao= Oscillator Anode G3- Screen Grid
C = Cathode
G3- Suppressor Grid
D, - Diode No. I
Go= Oscillator Grid
D3= Diode No. 2
H
Heater
-, Filament
M
Metallising
4 -PIN BASE
DESCRIPTION MAKER
VALVE TYPE
PIN NUMBER
TOP
CAP
1
2 3
4
General Purpose Battery Triode
Mazda HL2
A
G,
MI
F
-
Battery Power Valve
Mazda
Osram
Mullard
P220
LP2
PM2A
A
G,
F F
-
Battery Screen -Grid Valve
Mazda SG2I5
G,
G. F
F
A
5 -PIN BASE
DESCRIPTION
MAKER VALVE
TYPE
PIN NUMBER
TOP
CAP
I
-,
_
3
i
5
Battery Double Diode Triode
Mazda
1_21/DD
A
D, FctM
I-
0,
G,
Battery L.F. Pentode
..
Osram
Mazda
Mullard
PT2
Pen. 220
PM22A
A
G.
F
F
C
-
General Purpose Mains Triode
Mullard
354V
A
C,
H
H
C&NI
-
7 -PIN BASE
I.II-:SCR I PTION MAKER VALVE
TYPE
PIN NUMBER
TOP
CAP
I
'
-
:t
4
i
6
7
'Mains V M H F. Pentode
Mullard
VP{
M
G, G3 H
H
C
G,
A
vP4B
M A
G,
H H
C
G,
G,
Battery V.M H.F Pentode
..
Mazda
VP2I0
M
G.
G,
F
F
-
G2 A -
"Mains' H.F Pentode
.
..
Mullard SP4
MG,G,HHCG,A
Batter
H.F. Pentode
y
Mazda SP2I0
M
G,
C,
F F
-
G,
A
Mullard
SP2
M
G,
G
3
F F
-
G,
A
Mains Triode Hexode Freq. C.
Battery
..
..
..
Osram
X41
A.
G.
G,
H H
CAM
A
G.
X21
A.
Go
C.,
F
F M
A
G,
Mains Double Diode Triode ..
Mullard TDD4
D,
M D 2 H H
C A
G,
I.H. Mains Output. Pentode ..
Mullard
Pen 4VB
-
C,
G,
H
H C A
-
Class B Double Triode Valve ..
Osram
B21 G,(a) G,(b)
A(b)
F
F
-
A(a)
-
Fig.
Colour
Fig.
Colour
0
Black
5 Green
1
Brown
6 Blue
2
Red
7
Violet
3
Orange
8
Grey
4
Yellow
9
White
R.M.A. RESISTANCE
COLOUR CODE
CHART.
RESISTANCE
VALUE BODY
TIP
DOT
100 ohms
1,250 ohms
10,000 ohms
250,000 ohms
7 Megohms
Brown
Brown
Brown
Red
Violet
Black
Red
Black
Green
Black
Brown
Red
Orange
Yellow
Green
BODY COLOUR.
First
figure
of resistance
value.
TIP COLOUR.
Second figure.
DOT COLOUR.
No. of O's following
first
two figures.
Examples are
shown in table
to left