Yaesu FL2100B Instruction Manual page 29

Characteristics
Electrical
Filament:
Voltage (AC or DC)
Current
Amplification factor (average)
Direct interelectrode capacitances:
Grid to plate
Grid to filament
Plate to filament
Maximum frequency for full ratings
Mechanical
Cooling
Base
Plate cap Standard medium cap 14 mm dia. with ceramic thermal insulation
Plate connector
Socket
Operating position-Axis vertical, base down or horizontal w/ pins 1 and 4 in vertical plane
Nominal dimensions:
Diameter
Base to plate cap
Overall height
Net weight
Linear RF Power Amplifier, Class B Grounded Grid, Maximum ratings
DC plate voltage
DC plate current
Plate dissipation
DC Plate input
DC Grid current
*Intermittant commercial and ameteur service
Svetlana
E L E C T R O N D E V I C E S
SVETLANA TECHNICAL DATA
he Svetlana
T
and class C RF and Audio amplifiers. The Svetlana 572B features a massive graphite
anode for high peak overload capability and a high average plate dissipation of 160
Watts. The Svetlana 572B also features a low loss ceramic base and a bonded-
ceramic plate cap thermal insulator for high power RF transmitting tube capability.
The Svetlana 572B has a superior getter system based on titanium adhered to the external
surface of the graphite anode. The titanium coating covers the entire anode area extended by
the inherent micro surface roughness of graphite. The Svetlana 572B envelope is fabricated
from hard glass intended specifically for the high-temperature operation of transmitting tubes.
The internal tube parts are supported by low loss ceramic insulators for high-temperature
operation and high voltage hold-off. The internal structure is well supported and is aligned with
respect to the base pins to avoid internal shorts in equipment designed for horizontal tube
mounting.
The Svetlana 572B may be used as a direct drop-in replacement in equipment designed for
the 811A, T160L or 572B.
Ceramic, standard small four pin
Svetlana SK4A, Standard small, four contact
Headquarters:
8200 South Memorial Parkway
Huntsville, AL 35802
USA
Phone: 205 882 1344
Fax: 205 880 8077
www.svetlana.com
572B
High-Mu Power Triode
™
572B is a high-mu power triode intended for use in class AB, class B
Thoriated-tungsten
6.3 V 0.3V
4 A
170
6.0pF
5.9 pF
0.8 pF
30 MHz
Radiation and forced air
Svetlana PC-1A or equivalent
45.7 mm (1.8 in.)
147.3 mm (5.8 in.)
162.6 mm (6.4 in.)
113 gm
ICAS*
2750 V
275 mA
160 W
600 W
50 mA
Marketing & Engineering:
3000 Alpine Road
Portola Valley, CA 94028
USA
Phone: 415 233 0429
Fax: 415 233 0439
8/97
Svetlana Outline drawing
Plate connection
45.7 mm
standard medium cap,
14 mm Dia.
147.3 mm
162.6 mm
P
NC
2 3 G
Base pin connections,
bottom view
1 4
F F
Notes:
The internal structure is aligned with
respect to the base pins to avoid
internal shorting problems in equip-
ment designed for horizontal tube
mounting.
Ceramic
thermal
insulation
Low loss
ceramic
base, small
four pin