Re: Sticky Request: Seymour Duncan Tube Guide
Pretty harsh words...but maybe I don't get it.
What are you proposing that does not already exist on several sites.?.....this one for example...
http://tubedata.itchurch.org/index.html
No, you don't get it. Harsh words? Perhaps, but it reflects the kind of frustration a person builds get from dealing with people who just don't get it. I don't know if this will work, but sometimes the only way to get through to people is being a bit harsh.
The following is from your link to information:
European system after 1934 (pro-electron)
See also: Type Designation Code from "Preferred Types of Electron Tubes 1967".
1st letter heater indication
0 tubes without filament
A 4 V AC parallel connection
B 180 mA DC
C 200 mA AC/DC series or parallel connection
D <= 1.4 V DC dry-battery, parallel connection
E 6.3 V AC or carbattery, parallel connection
F 13 V carbattery
G 5V AC parallel connection
H early: 4V DC battery. later: 150mA AC/DC series connection
I 20V AC/DC parallel connection
K 2 V battery
O 150 mA AC/DC series connection
P 300 mA AC/DC series connection
U 100 mA AC/DC series connection
V 50mA AC/DC series connection
X 600 mA AC/DC series connection
Y 450 mA AC/DC series connection
2nd+next letters tube systems
A single detection diode
B double detection diode
C small-signal triode
D power triode
E small-signal tetrode (or 2nd emmission tube EE1)
F small-signal pentode
H hexode or heptode
K octode
L power pentode or power tetrode
M indicator tube
N thyratron
Q enneode
W single gasfilled rectifier diode
X double gasfilled rectifier diode
Y single vacuum rectifier diode
Z double vacuum rectifier diode
digits socket & order
x P (some are V) (except U-series (e.g.UBL1), those are octal)
1x Y8A
2x W8A, Loctal (except D-series (e.g. DL21), those are octal)
3x K8A, A08, octal
4x A8A, B8A, Rimlock
5x T9A, B9G, Enne-al and C2R and some special bases
6x Subminiature
7x Subminor8p
8x, 18x, 8xx B9A, noval
9x, 19x, 9xx B7G, miniature-7p (Exception: The ECC99 is a poorly chosen tube type number, as it comes with a noval base.)
2xx, 2xxx decal
5xx B9D, magnoval
Examples Description
CBL1 output pentode with dual detection diode, heater 200mA, P base
EABC80 tripple signal diode with triode, heater 6.3V, noval base
ECC83 dual triode, heater 6.3V, noval base
GZ34 dual vacuum rectifier, heater 5V, octal base
PFL200 pentode and power pentode, heater 300mA, decal base
UCH21 triode and heptode, heater 100mA, base loctal
Philips system before 1934
1st letter heater current
A 0.06 to 0.10 A
B 0.10 to 0.20 A
C 0.20 to 0.40 A
D 0.40 to 0.70 A
E 0.70 to 1.25 A
F > 1.25 A
2nd digit or 2nd+3rd digits heater voltage
x heater voltage < 10 V
xx heater voltage >= 10V
last 2 digits description
xx amplification factor for triodes
41, 51 etc tetrode with spacecharge grid (2nd grid is control grid)
42, 52 etc tetrode with screen grid (1st grid is control grid)
43, 53 etc power pentode
44, 54 etc triode with diode or tetrode with diode
45, 55 etc hf tetrode with variable gain
46, 56 etc hf pentode
47, 57 etc hf pentode with variable gain
48, 58 etc hexode frequency changer
49, 59 etc hexode with variable gain
Suffix letter Description
H ?
N ? New, later version
S ? Series connection allowed
T ?
Examples Bases usually: A or O
E499 triode, If=1A , Vf=4V, gain=99
F443N power pentode, If=2A, Vf=4V
B2046 hf pentode, If=0.18A, Vf=20V
MAZDA NUMBERING SYSTEM Signal valves
First number indicates heater or filament rating
1 1.4V (parallel or series)
6 6.3V (parallel or series)
10 0.1A (series)
20 0.2A (series)
30 0.3A (series)
Following letter or letter sequence indicates class of valve
C Frequency changer with special oscillator section
D Signal diode(s)
F Voltage amplifier tetrode or pentode
FD Voltage amplifier tetrode or pentode with diode(s)
FL Voltage amplifier tetrode or pentode with voltage amplifier triode
K Small gas triode or tetrode
L Voltage amplifier triode or double triode including oscillator triode
LD Voltage amplifier triode with diode(s)
M Tuning indicator
P Power amplifier valve, tetrode or pentode
PL Power amplifier valve, tetrode or pentode with voltage amplifier triode
Final number distinguishes between different valves in the same class
MAZDA NUMBERING SYSTEM Power rectifier valves
Letters indicates heater or filament rating
U High vacuum half-wave
UU High vacuum full-wave
Final number distinguishes between different valves in the same class
RUSSIAN NUMBERING SYSTEM
The regulation GOST 5461-59 applies to tubes manufactured from 1959 and semiconductors manufactured from 1959 to 1963. Every symbol consists of four elements. If an element is absent, a dash should be written at its place.
Note: There are exceptions. Not all Russian tubes are numbered according this system.
First element
Generator (transmitting) tubes up to 25 MHz
UKF generator (transmitting) tubes 25-600 MHz
Centimeter range generation (transmitting) tubes
Modulator tubes
High power rectifiers
Voltage stabilizers
Current stabilizers
Thyratrons
Gas-discharge rectifiers
Mercury gas-discharge rectifiers
, Photocells and photomultipliers
Approximate (usually full volts) heater voltage Receiving tubes
Screen diameter in cm Picture tubes
Semiconductor diodes
Transistors
Second element
Diodes
Double diodes
Triodes
Tetrodes
Power pentodes and tetrodes
Remote cut-off pentodes
Sharp cut-off pentodes
Secondary emission pentodes
Mixing tubes with two signal grids
Pentodes with one or two diodes
Triodes with one or more diodes
Tuning indicators
Triodes with hexode, heptode or octode
Double triodes
Double tetrodes and pentodes
Triode - pentodes
Rectifiers
Type sequence number Gas-discharge tubes, power rectifiers
Gas thyratrons
Mercury thyratrons
Cold cathode thyratrons
Oscillograph tubes with electrostatic deflection
Oscillograph tubes with electromagnetic deflection
TV picture tubes
Type sequence number Semiconductors
Third element
Receiving, picture, generator and modulator tubes
voltage and current stabilizers
photocells and photomultipliers
cold cathode thyratrons Type sequence number
Semiconductors Subtype, group (letter)
Fourth element
none Metal Receiving tubes; voltage and current stabilizers
Glass
HF glass, side leads
Ceramic
Miniature glass 19 and 22.5 mm
Subminiature > 10 mm
Subminiature 10mm
Subminiature 4 mm
Subminiature 6 mm
lock-in-key
Disc leads
Water cooled Generator (transmitting) and modulator tubes
Air cooled
letter Luminophor color code Picture tubes
X/Y X = average current in A
Y = reverse voltage amplitude in kV Thyratrons (non cold cathode), Gas-discharge, power rectifiers
After symbol dash and postfix of one or more letters may be added:
high reliability tube (military)
long life tube (military)
designed for impulse operation
vibration resistant
Current Regulators
[A][V1-V2] [A] is the current (in amperes) and [V1-V2] is voltage range
Brimar type designation code for Receiving Valves
First Number Indicates the Construction
1 Half Wave Rectifiers
2 Diodes. Single
3 Triodes, Output
4 Triodes, High-mu
5 Tetrodes, Straight
6 Tetrodes, Vari-mu
7 Pentodes, Power and Video
8 Pentodes, R.F. Straight
9 Pentodes, R.F. Vari-mu
10 Diodes, Double
11 Triodes with Double Diode
12 Pentodes, A.F. with Double Diode
13 Triodes Double, High-mu
14 Triodes Double, Class B Output
15 Heptodes
16 Triodes Output, D.C. Coupled
17 Pentodes R.F. with Double Diode
18 Pentodes with Triode
19
20 Hexode/Heptode with Triode
Letter Indicates the heater rating
A 3.6 to 4.4V Indirectly Heated
B 2V Directly Heated
C Directly Heated other then 2 or 4V
D All other heater ratings Indirectly Heated other then 4V
Number Serial number
Serial Numbers are allocated in chronological order as new valve types are introduced
TESLA NUMBERING SYSTEM
leading digits heater indication
Approximate (usually full volts) heater voltage
middle letters tube systems (a subset of European system)
A single detection diode
B double detection diode
C small-signal triode
F small-signal pentode
H hexode or heptode
L power pentode or power tetrode
M indicator tube
Y single vacuum rectifier diode
Z double vacuum rectifier diode
trailing digits socket and order
1x octal K8A, A08
2x loctal W8A
3x heptal B7G
4x noval B9A
5x special; mostly, 9 out of 10 pins 1.25mm on a circle diameter 25mm
6x submagnal B11A (no actual tube in this system known)
7x duodecal B12A (no actual tube in this system known)
8x diheptal B14A (no actual tube in this system known)
9x free wires
Examples Description
35Y31 Single rectifier, heptal (7pin miniature) socket; 35V/150mA series heater; otherwise, European UY1N in heptal format
4L20 HF power pentode; filament 2x2.4V / 325mA, Soviet 4П1Л; German RL4,2P6 in loctal format
6CC42 VHF double triode; 6.3V/350mA heater, noval; equivalent to 2C51
6F24 Telecom pentode, 6.3V/450mA heater, loctal; not similar to later Mazda's 6F24
1M90 Subminiature indicator tube, 1.4V/25 mA filament, European DM70
leading 2 digits screen specification
Approximate screen diameter or diagonal, in centimeters
3rd digit type order
middle letters focusing and deflection
QP magnetic focusing, magnetic deflection (early TV tubes)
QQ electrostatic focusig, magnetic deflection (later TV tubes)
QR electrostatic focusing and deflection (oscilloscope tubes)
trailing digits screen color and persistence
Examples Description
7QR20 Oscilloscope tube, 7cm diameter, green fluorescence, middle persistence
430QP44 TV tube, 43cm diagonal, magnetic focusing and deflection, white fluorescence, pentode system, 90 degrees deflection angle
430QQ44 TV tube, 43cm diagonal, electrostatic focusing, magnetic deflection, white fluorescence, tetrode system, 110 degrees deflection angle
431QQ44 Identical to 430QQ44, except with metal-backed screen
1st letter tube category
R HF tube
Z modulator tube
U gas-filled power rectifier
2nd letter tube systems
see receiving tubes
digits power level
Anode dissipation in watts or kilowatts
trailing letters cooling system (optional 1st letter), tube order
X air cooling
Y water cooling
Examples Description
RA0007B Ballast diode controlled by filament current; max anode current 0.7mA
RD1,5XA Air-cooled power triode up to 30MHz, 1.5kW anode dissipation
RE40AK KT88 by Tesla Vršovive (in production)
