Yaesu FL2100B Instruction Manual - Svetlana Technical Data
Svetlana Outline drawing
Characteristics
T
SVETLANA TECHNICAL DATA
Marketing & Engineering:
Headquarters:
www.svetlana.com
E L E C T R O N D E V I C E S
Svetlana
8200 South Memorial Parkway
Huntsville, AL 35802
USA
Phone:
205 882 1344
Fax:
205 880 8077
3000 Alpine Road
Portola Valley, CA 94028
USA
Phone:
415 233 0429
Fax:
415 233 0439
he Svetlana
™
572B is a high-mu power triode intended for use in class AB, class B
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.
Electrical
Filament:
Thoriated-tungsten
Voltage (AC or DC)
6.3 V
±
0.3V
Current
4 A
Amplification factor (average)
170
Direct interelectrode capacitances:
Grid to plate
6.0pF
Grid to filament
5.9 pF
Plate to filament
0.8 pF
Maximum frequency for full ratings
30 MHz
Mechanical
Cooling
Radiation and forced air
Base
Ceramic, standard small four pin
Plate cap
Standard medium cap 14 mm dia. with ceramic thermal insulation
Plate connector
Svetlana PC-1A or equivalent
Socket
Svetlana SK4A, Standard small, four contact
Operating position-Axis vertical, base down or horizontal w/ pins 1 and 4 in vertical plane
Nominal dimensions:
Diameter
45.7 mm (1.8 in.)
Base to plate cap
147.3 mm (5.8 in.)
Overall height
162.6 mm (6.4 in.)
Net weight
113 gm
Linear RF Power Amplifier, Class B Grounded Grid, Maximum ratings
ICAS*
DC plate voltage
2750
V
DC plate current
275
mA
Plate dissipation
160
W
DC Plate input
600
W
DC Grid current
50
mA
*Intermittant commercial and ameteur service
572B
High-Mu Power Triode
8/97
147.3 mm
162.6 mm
45.7 mm
NC
P
2
3
1
4
G
F
Low loss
ceramic
base, small
four pin
Ceramic
thermal
insulation
Plate connection
standard medium cap,
14 mm Dia.
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.
Base pin connections,
bottom view