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Vacuum Tubes for Amps
Sovtek 5881 data
Someone in the past asked for Sovtek 5881/6L6WGC tube data. Well now
that I've figured out how much to pay the president ;-) I have a
some time to post this. The following is from a tube characteristics
sheet received with these tubes directly from New Sensor.
If someone has the initiative, I would appreciate a followup post that
compares (where possible) data on key attributes with a Tung-Sol
5881 (or Phillips, Sylvania, etc.) - seems like there are discussion
frequently enough about what can be used to substitute the Sovtek
5881/WGC.
LK
PS - Did I see that someone out there was doing some characteristic curve
traces on these?
PSS - Data suggests these can be operated at very high accelerations,
so how 'bout some groovin tube amps for space shuttle/ MIG crews ;-)
============================= begin ==================================
Made in Russia
Tube 6H36 E {<---- Cryllic overwritten with
58816L6WGC}
1. GENERAL
----------
Beam tetrode in a glass envelope with a base insert and
indirectly heated cathode designed for use in final stages of Cryllic
low-frequency amplifiers of radiotechnic devices, type 6H36 E {<- overwritten}
{drawings of bottom and side view of tube with dimensions}
Mass max-80g.
Terminal Connections
Pin Electrode
2 and 7 Heater
3 Plate
4 The second grid
5 The first grid
8 Cathode and beamforming screen
o 3
|
|
=====
// \\
// \\
| |
4 o_____ | _ _ _ _ |
| _ _ _ _ | _____o 5
| |
|-=======-|
2 o------- | -------o 7
|
o 8
2. SERVICE CONDITIONS
---------------------
Sinous vibration (prolonged):
frequency range, Hz 1-300
acceleration amplitude, m/s*2 29.4
Sinous vibration (short term):
frequency range, Hz 1-300
acceleration amplitude, m/s*2 58.8
Mechanical shock:
of a single order
pick shock acceleration, m/s*2 1471
shock duration, ms 2 +- 1
of a multiple order
pick shock acceleration, m/s*2 147
shock duration, ms 8 +- 3
Linear acceleration, m/s*2 981
High ambient operating temperature, K 358
Low ambient operating temperature, K 213
High relative humidity at temperature 308K
without moisture condensation, % 98
Low atmosphere pressure, Pa 666
High air or other gas pressure, Pa 297198
Temperature variation, K:
from 453
up to 2123
White frost effect with its subsequent
melting {value not given}
Salt fog {value not given}
Mould (for tropical version) {value not given}
3. BASIC SPECIFICATIONS
-----------------------
3.1. Electric Characteristics At Delivery
Parameters, units Rate Notes
--------------------------------------------------------------
Heater current, mA: 1
min 840
max 920
Plate current, mA: 1,2,3
min 60
max 86
Plate current at the origin of
characteristic, mA, max 10 1,2,4
The first grid reverse current, uA, max 0.5 1,2,3,5
The second grid current, mA, max 6 1,2,3
Output power, W, min 5.8 1,2,3,6
Output power at underheating, W, min 5 2,3,6,7
Transconductance, mA/V 1,2,3
min 5.2
max 6.8
Cathode-to-heater insulation
resistance, Mohms, min 4 1,8
The first grid- (cathode+heater)
insulation resistance, Mohms, min 200 9,11,12
Internal resistance, kohms, max 65 1,2,3
Nonlinear distortion factor, % , max 15 1,2,3,6
Input capacitance, pF, nominal 11
Output capacitance, pF, nominal 6.7
Transfer capacitance, pF, max 1
Cathode-to-heater cap, pF, nominal 11
Readiness time, s, max 50 1,2,3
Notes:
1. Heater voltage 6.3V
2. Plate and the second grid voltage 250V
3. The first grid voltage -14 V
4. The first grid voltage -35 V
5. Resistance in the first grid circuit 0.5 Mohms
6. The first grid alternative current, effective, 9.8V;
resistive in a plate tuned circuit 2.5 kohms
7. Heater voltage 5.7 V
8. Cathode-to-heater voltage +- 250V
9. Heater voltage 7 V
10. The first grid voltage -100 V
11. The first grid voltage -200 V
12. All the other electrodes are free
3.2 Electric Characteristics Changing During Operation
Parameters, units Rate
----------------------------------------------------
The first grid reverse current, uA, max 4
Output power at normal ambient temp, W, min 4.5
Plate current instability at high ambient
temperature 358 K, % , max +- 25
3.3 Maximum Ratings
Rate Rate
up to up to
Parameters, units 500 hrs 5000 hrs
------------------------------------------------------------------------
Heater voltage, V:
min 5.7 6
max 7 6.6
Plate voltage, V, max 250 250
The second grid voltage, V, max 250 250
Cathode-to-heater voltage:
of positive polarity V, max 90 90
of negative polarity V, max 200 200
Cathode current, mA, max 90 90
Plate dissipated power, W, max 20.5 20.5
The second grid dissapted power, W, max 2.75 2
Resistance in the first grid circuit, Mohms, max 0.5 0.5
Envelope temperature in the most heated
part against the plate, K, max 483 483
4. OPERATING INSTRUCTION
------------------------
4.1 It is not advisable to use the tube in heater series connection
circuit in order to secure tube reliability.
4.2 Heater voltage should not exceedits nominal value in order to
increase parameter instability and operating time.
4.3 The second grid voltage must never exceed (even for a short
time) the maximum rating and voltage applied to the plate at
a given moment.
4.4 If it is possible one should use automatic bias by means of
including resistance of an appropriate value in the cathode circuit.
4.5 In any case resistance in control grid circuit must be confined
to the possible minimum.
4.6 When mounting panels one should provide free floatinging of terminals
in sockets. Panel mounting must be realized by means of a mounting
gadget inserted in a panel; or one may use a tube with straight and
parallel pins.
4.7 It is not allowed to use tube free socket lugs as support mounting
points.
4.8 It is recommended to provide the minimum envelope temperature (e.g.
ventilation improvement, practical tube placement in units, appli-
cation of heat sinking panels and screens).
4.9 When operation the tube it is recommended to keep within the values
specified by the absolute maximum ratings. Otherwise the tube will
become inoperative.
4.10 It is not allowed to combine envelope temperature more than 453 K
and heater voltage more than 6.3 V.
5. STORAGE
----------
5.1 Tubes should be kept in depots at temperature 213-323K and relative
humidity as high as 90%.
5.2 Acid vapour, alkali and other chemical agents as well as gases
easily diffusing through glass, especially helium, must not be
present in the room where there are tubes.
6. CERTIFICATE
--------------
The tube 6H36 E {Cryllic overwritten} is tested by the Technical
Control Department; it is fit for operation.
OTK Stamp { OTK - 12 }
============================= end ======================================
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