kt88 sed2001 .pdf


Nom original: kt88-sed2001.pdf
Titre: KT88.PDF
Auteur: Administrator

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KT88 BEAM POWER
TETRODE

The Svetlana™ KT88 is a beam power tetrode having
a large standard octal base and glass envelope. With a
gold-plated molybdenum alloy grid and carbon-coated
screen grid, the Svetlana KT88 is the finest power tube
of its type being manufactured today. Its exclusive
screen-grid radiator fins reduce a major source of
failure in audio amplifiers, especially when operated in
ultralinear or triode connection. All ratings of the
Svetlana KT88 meet or exceed those of the original
version; top-quality cathode materials and extensive
aging yield outstanding performance in high-fidelity
amplifiers. The Svetlana KT88 is made exclusively at
the Svetlana Electron Devices factory in St. Petersburg,
Russia, and is marketed worldwide by PM Components
Ltd. and in the USA by PM of America Inc.

TYPICAL MECHANICAL AND ELECTRICAL PARAMETERS
Exact replacement for:
Heater:
Cathode:
Capacitances:
control grid to anode
control grid to cathode
Mounting and basing
Height
Diameter
Mass

6550, 6550A, KT88, KT90,
KT99, KT100
6.3v AC or DC, 1.65 amps
oxide-coated high-purity nickel sleeve
1.4 pF
16.5 pF
large octal, metal ring conn. to pin 1,
device operable in any position
120 mm (4.7 in)
52 mm (2.0 in)
95 g (3.4 oz)

____________________________________________________________
HEADQUARTERS:
CERAMIC TUBE DIVISION:
1687 Shelby Oaks Drive
895 B. Street PMB #481
Suite 8
Hayward, CA 94541
Memphis, TN 38134
Phone / Fax: 510-885-1247
Phone: 901-388-2424
Fax: 901-388-2405
www.svetlanausa.com

ABSOLUTE MAXIMUM RATINGS
Cathode-heater maximum DC voltage
Allowable spot temperature on envel.
Plate voltage, DC (at idle)
Plate voltage, DC, in triode connection
Screen voltage, DC, at idle
Control grid voltage, DC, at idle
Cathode current, DC, at idle
Plate dissipation, peak or idle
Screen grid dissipation, peak or idle
Control grid resistance, fixed bias
TYPICAL OPERATION

+-250v
250 degrees C
820 v
610 v
610 v
-350 v
235 mA
44 watts
10 watts
220k ohms

Push-pull class AB1 tetrode connection, cathode bias
Plate voltage
560v DC
Screen voltage
300v DC
Plate current, idle
120 mA
Plate current, full power
150 mA
Cathode bias resistor, common
350 ohms 25w
Load resistance, plate-to-plate
9000 ohms
Output power
50 watts
Total harmonic distortion at 50w output 3%
Push-pull class AB1 tetrode connection, fixed bias
Plate voltage
560v DC
Screen voltage
300v DC
Plate current, idle
120 mA
Plate current, full power
290 mA
Grid bias
-45 v DC
Load resistance, plate-to-plate
4500 ohms
Output power
100 watts
Total harmonic distortion at 100w out
2.5%

____________________________________________________________
HEADQUARTERS:
CERAMIC TUBE DIVISION:
1687 Shelby Oaks Drive
895 B. Street PMB #481
Suite 8
Hayward, CA 94541
Memphis, TN 38134
Phone / Fax: 510-885-1247
Phone: 901-388-2424
Fax: 901-388-2405
www.svetlanausa.com

Push-pull class AB1 ultralinear connection, cathode bias
Plate voltage
500v DC
Screen taps
40%
Plate plus screen current, idle
180 mA
Plate plus screen current, full power
200 mA
Cathode bias resistor, common
400 ohms 25w
Load resistance, plate-to-plate
6000 ohms
Output power
50 watts
Total harmonic distortion at 50w out
1.5%

Push-pull class AB1 triode connection, fixed bias
Plate and screen voltage
480v DC
Plate plus screen current, idle
120 mA
Plate plus screen current, full power
150 mA
Grid bias
-65 v DC
Load resistance, plate-to-plate
4000 ohms
Output power
30 watts
Total harmonic distortion at 30w out
1.5%

____________________________________________________________
HEADQUARTERS:
CERAMIC TUBE DIVISION:
1687 Shelby Oaks Drive
895 B. Street PMB #481
Suite 8
Hayward, CA 94541
Memphis, TN 38134
Phone / Fax: 510-885-1247
Phone: 901-388-2424
Fax: 901-388-2405
www.svetlanausa.com


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