DIODE CV2398 NOISE GENERATOR VALVES TUNGSTEN FILAMENT … · 2014. 6. 13. · TUNGSTEN FILAMENT...
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VALVES DIODE NOISE GENERATOR TUNGSTEN FILAMENT CV2398 ISSUE 1 A diode noise generator with a flexible lead Noval base. Suitable for use up to 500 Mc/s. BASE CONNECTIONS AND VALVE DIMENSIONS Base: B9A/F Bulb: Tubular Max. bulb length : Max. diameter : Min. lead length : 49rnm 22rnm 35 mm View from underside of base. FILAMENT VI (range) If (at Vf=6V) 0-6 1·15 (approx) V A The value of the saturated anode current is regulated by variation of the filament voltage. MAXIMUM RATINGS (Absolute) Va 200 r, 85 pa 3·5 Vf 6 V rnA W V CAPACITANCES (Measured on a cold unscreened valve) Ca-I(m.x) 3 pF CHARACTERISTICS Va Ia(sat) (approx) VI (approx) 50 50 5·6 V rnA V TYPICAL OPERATION Noise diode for use up to 220Mc/s Va Ia(sat) (range) Vf (range) (approx) Rsource Noise Factor Measurement (range) (approx) When measuring receiver noise factor using with the diode a source resistance Rsource (to match the receiver input) and the technique of setting the value of Ia(sat) to double the noise output power from the receiver detector, the range of noise factor that can be measured with a given value of Rsource is as shown. Then, noise factor = 10 10glO (Ia(sat)X Rsource) db. No correction of noise factor measured is necessary up to 220 Mc/s, 50 50 50 0-70 0-70 0-70 0-6 0-6 0-6 50 70 300 V rnA V n 18·4 19·9 26·2 db THE GENE RALE LEe TRIC CO. LTD. 0 FEN GLAN 0 Head Office : Magnet House Kingsway London W.C.2 AUGUST, 1958
Transcript of DIODE CV2398 NOISE GENERATOR VALVES TUNGSTEN FILAMENT … · 2014. 6. 13. · TUNGSTEN FILAMENT...
VALVES
DIODENOISE GENERATOR
TUNGSTEN FILAMENT
CV2398ISSUE 1
A diode noise generator with a flexible lead Noval base. Suitable for use up to500 Mc/s.
BASE CONNECTIONS AND VALVE DIMENSIONS
Base: B9A/FBulb: TubularMax. bulb length :Max. diameter :Min. lead length :
49rnm22rnm35 mm
View from undersideof base.
FILAMENTVI (range)If (at Vf=6V)
0-61·15 (approx)
VA
The value of the saturated anode current is regulated by variation of the filamentvoltage.
MAXIMUM RATINGS (Absolute)Va 200r, 85pa 3·5Vf 6
VrnAWV
CAPACITANCES (Measured on a cold unscreened valve)
Ca-I(m.x) 3 pF
CHARACTERISTICSVaIa(sat) (approx)VI (approx)
50505·6
VrnAV
TYPICAL OPERATIONNoise diode for use up to 220Mc/s
VaIa(sat) (range)Vf (range) (approx)RsourceNoise Factor Measurement
(range) (approx)
When measuring receiver noise factor using with the diode a source resistanceRsource (to match the receiver input) and the technique of setting the value of Ia(sat) todouble the noise output power from the receiver detector, the range of noise factorthat can be measured with a given value of Rsource is as shown.
Then, noise factor = 10 10glO (Ia(sat)X Rsource) db.No correction of noise factor measured is necessary up to 220 Mc/s,
50 50 500-70 0-70 0-700-6 0-6 0-6
50 70 300
VrnAVn
18·4 19·9 26·2 db
THE G ENE RALE LEe T RIC CO. LTD. 0 FEN G LAN 0Head Office : Magnet House Kingsway London W.C.2
AUGUST, 1958
CV2398
INSTALLATION
The valve can be mounted in any position.A screening can, which also serves as a retainer, is necessary.Free air circulation around the can is preferable. The temperature of the hottest
part of the bulb must not exceed 200°C.Leads should not be soldered or bent less than 3 rnrn from the base.
8 o·N
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CV2398
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(vw) (lBS) BI
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CV2398
1107
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Va 5090
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10
00-6 0-7 0-8 0'9 1'0 I-I 1-2If ( A)
OV.4412 Printed in England. C.
