7086

voltage (AC) v & « v ¢ ¢« « v « « « « 2.5 % 5% volts

5 V

voltage (AC) v & « v ¢ ¢« « v « « « « 2.5 % 5% volts

X-ray tube control cir- Current at 2.5 volts . + . & « & & &

92 V

X-ray tube control cir- Current at 2.5 volts . + . & « & & & 92 amp

the tubes are operated Grid to filament « o « « & v o & & &

7.5 pF

the tubes are operated Grid to filament « o « « & v o & & & 7.5 uuf

2 seconds and an '"off" Maximum Critical Grid Current for

2 s

2 seconds and an '"off" Maximum Critical Grid Current for

period of %4 seconds, instantaneous anode volts = 650

50 V

period of %4 seconds, instantaneous anode volts = 650 . . 50 wamp

Under conditions: 10000-ohm grid

10000 ohm

Under conditions: 10000-ohm grid

400 amperes and an average anode current of |[27 resistor, returns to filament

27 A

400 amperes and an average anode current of |[27 resistor, returns to filament

at FS?, anode voltage between

100 V

at FS?, anode voltage between 100

mits the control of 280 amperes rms through the and 700 volts, and plate load

700 V

mits the control of 280 amperes rms through the and 700 volts, and plate load

of 2000 OhMS v & v v ¢ & & o & « « &

100 ohm

of 2000 OhMS v & v v ¢ & & o & « « & 100

of 100 milliamperes at a voltage suitable for operating Position « « & ¢« v ¢ & & v v v ¢ 4 « « 4 .

4 V

of 100 milliamperes at a voltage suitable for operating Position « « & ¢« v ¢ & & v v v ¢ 4 « « 4 . JADY

anode current of 160 amperes and a maximum nozzle located about 12 inches from the anode end of

12 A

anode current of 160 amperes and a maximum nozzle located about 12 inches from the anode end of

average anode current of 40 amperes, the anode cup and permitted to flow freely around the

40 A

average anode current of 40 amperes, the anode cup and permitted to flow freely around the

surface) . . . . . 300 max. o anode voltages should be 900 out of phase for optimum

900 V

surface) . . . . . 300 max. o anode voltages should be 900 out of phase for optimum

Weight (Approx.) e e e e e e e 3 1bs voltages between 600 and 120° out of phase. In poly

120 V

Weight (Approx.) e e e e e e e 3 1bs voltages between 600 and 120° out of phase. In poly-

Forward. . « « + + 4 . 650 max. 650 max. volts "Standard on Electron Tubes: Methods of Testing,

1950 V

Forward. . « « + + 4 . 650 max. 650 max. volts "Standard on Electron Tubes: Methods of Testing, 1950

Inverse. . . . . . . . 650 max. 650 max. volts (50 IRE 7.52)" available from The institute of Radio

7.52 V

Inverse. . . . . . . . 650 max. 650 max. volts (50 IRE 7.52)" available from The institute of Radio

GRID VOLTAGE: Englneers, 1 East 79 St, New York 21, N. Y. Also

21 V

GRID VOLTAGE: Englneers, 1 East 79 St, New York 21, N. Y. Also

conduction . . . . . -—150 max. -150 max. volts invelve anode supply voltage (Epp) of 300 volts, gri

300 V

conduction . . . . . -—150 max. -150 max. volts invelve anode supply voltage (Epp) of 300 volts, grid

Average, during tube supply voltage (Ecc) of -150 volts, grid resistor rq)

-150 V

Average, during tube supply voltage (Ecc) of -150 volts, grid resistor rq)

conduction . . . . . -10 max. —-10 max. volts of 5000 ohms and anode current (Ip) of

23 V

conduction . . . . . -10 max. —-10 max. volts of 5000 ohms and anode current (Ip) of 23 amperes.

Peak « « « ¢ « « o . . 160 max. 400 max. amp decay in amperes per microsecond just before conduction

400 A

Peak « « « ¢ « « o . . 160 max. 400 max. amp decay in amperes per microsecond just before conduction

AVErage. « « « o & o 10 max.®O 7 max. amp ceases and the rate of inverse voltage rise in volts

7 V

AVErage. « « « o & o 10 max.®O 7 max. amp ceases and the rate of inverse voltage rise in volts

0.1 second maximum . %000 max. 4000 max. amp Continuous Service is defined as service where

4000 A

0.1 second maximum . %000 max. 4000 max. amp Continuous Service is defined as service where

Average positive . . . 2.0 max. 2.0 max. amp

2 A

Average positive . . . 2.0 max. 2.0 max. amp

anode negative . . . 0.1 max. 0.1 max. amp conduction does not take place as often as every cycle

100 mA

anode negative . . . 0.1 max. 0.1 max. amp conduction does not take place as often as every cycle

RANGE . . . . =55 to +75 -55 to +75 oc Averaged over any period of 15 seconds maximum

15 s

RANGE . . . . =55 to +75 -55 to +75 oc Averaged over any period of 15 seconds maximum.

Averaged over any period of 36 seconds maximum

36 s

Averaged over any period of 36 seconds maximum.

Power Utilizing Inverse-Parallel Circuit of Fig.6: Averaged over the "on" period of

2 s

Power Utilizing Inverse-Parallel Circuit of Fig.6: Averaged over the "on" period of 2 seconds

AC Anode-Supply voltage (RMS). . . . . 220 volts average or the rms load current is reduced buf the

220 V

AC Anode-Supply voltage (RMS). . . . . 220 volts average or the rms load current is reduced buf the

Grid-Bias voltage. . . « . . + « « .+ -50 volts severity of duty on the 7086 is not reduced

7086 V

Grid-Bias voltage. . . « . . + « « .+ -50 volts severity of duty on the 7086 is not reduced.

Grid-Pulse voltage . + v v « & o o « & 60 volts the time at which the incoming and outgoing tubes ha

60 V

Grid-Pulse voltage . + v v « & o o « & 60 volts the time at which the incoming and outgoing tubes have

Peak « v ¢ v v ¢ v v e e e e e e e 400 amp oidal supply

400 A

Peak « v ¢ v v ¢ v v e e e e e e e 400 amp oidal supply.

Average‘ [ T

127 A

Average‘ [ T 127 amp

Load RMS Demand Current. + o « o o o«

280 A

Load RMS Demand Current. + o « o o o« 280 amp

Grid-Circuit Resistance. . . « . + .« . 0.1 max. megohm of the 7086 may be impaired from the viewpoi

7086 ohm

Grid-Circuit Resistance. . . « . + .« . 0.1 max. megohm of the 7086 may be impaired from the viewpoint of

Filament Current . . . . . 1 87

97 A

Filament Current . . . . . 1 87 97 amp

Peak Tube voltage Drop . . 1,2 - 40 volts never be exceeded under any usual condition of

40 V

Peak Tube voltage Drop . . 1,2 - 40 volts never be exceeded under any usual condition of

Critical Anode Voltage . . 1,3 - 100 peak volts supply-voltage variation, load variation, or

100 V

Critical Anode Voltage . . 1,3 - 100 peak volts supply-voltage variation, load variation, or

Note t: With 2.5 volts rms on filament

2.5 V

Note t: With 2.5 volts rms on filament.

Note 2: With peak anode current of 400 amperes provided The maximum fault anode current rating shown

400 A

Note 2: With peak anode current of 400 amperes provided The maximum fault anode current rating shown

tied to anode through a 10,000~-ohm resistor. second maximum) that should pass through the

10000 ohm

tied to anode through a 10,000~-ohm resistor. second maximum) that should pass through the

Note 3: The voltage at terminal F is in phase with the tube under the most adverse conditions of ser

3 V

Note 3: The voltage at terminal F is in phase with the tube under the most adverse conditions of ser-

FS. Grid resistor = 0 to 100,000 ohms. equipment designer in a choice of circuit com

100000 ohm

FS. Grid resistor = 0 to 100,000 ohms. equipment designer in a choice of circuit com-

of the filamentand for maximum tube 1ife, the voltage at approximating a short circuit. It is not in

1 V

of the filamentand for maximum tube 1ife, the voltage at approximating a short circuit. It is not in-

RANGE IS FOR CONDITIONS WHER lead should be hard soldered to a

225 A

RANGE IS FOR CONDITIONS WHER lead should be hard soldered to a 225-ampere

E£=25 VOLTS AC £5%.CIRCUIT RETURNS TO FILAMENT TERMI

5 V

E£=25 VOLTS AC £5%.CIRCUIT RETURNS TO FILAMENT TERMI-

GRID RESISTOR = 0 TO (

0 ohm

GRID RESISTOR = 0 TO (00000 OHMS

rents may reach a value as high as {

20 A

rents may reach a value as high as {20 amperes

E¢= 2.5VOLTS AC PHASE CIRCUIT

2.5 V

E¢= 2.5VOLTS AC PHASE CIRCUIT

same manner as other tube ratings. The tempera- GRID RESISTOR=I0000 OHMS CURVE| A\GLE¥ | RETURN TO

0 ohm

same manner as other tube ratings. The tempera- GRID RESISTOR=I0000 OHMS CURVE| A\GLE¥ | RETURN TO

conveniently be measured with temperature-sensi- ANODEVOLTAGE (WITH B

1805 V

conveniently be measured with temperature-sensi- ANODEVOLTAGE (WITH B 1805 F

RESPECT TO VOLTAGE AT c 0° F

0 V

RESPECT TO VOLTAGE AT c 0° F

stud so that I-1/2 inches of the free end extends DC GRID SUPPLY VOLTS 92CS

-9426 V

stud so that I-1/2 inches of the free end extends DC GRID SUPPLY VOLTS 92CS -9426

not less than 60 seconds after application of range, and independent of grid bias. Conduction

60 s

not less than 60 seconds after application of range, and independent of grid bias. Conduction

tions of operation to prevent exceeding the HGRID RESISTOR =

0 ohm

tions of operation to prevent exceeding the HGRID RESISTOR = 0 OHMS

The anode voltages at which the %7086 1s o

1 V

The anode voltages at which the %7086 1s o

tube and its associated apparatus, especially all C A AMPEREIS]=

771 A

tube and its associated apparatus, especially all C A AMPEREIS]= 771 ,n

housing is opened, and should prevent the closing DC GRID VOLTS

92 V

housing is opened, and should prevent the closing DC GRID VOLTS 92CS

The 7086 has a critical grid voltage which

7086 V

The 7086 has a critical grid voltage which

E¢= 2.5VOLTS AC GRID CIRCUIT | puase values shownin Fig.l. From them he can determine

2.5 V

E¢= 2.5VOLTS AC GRID CIRCUIT | puase values shownin Fig.l. From them he can determine

VOLTAGE (WITH RE= | A 0.0l FS o

0 V

VOLTAGE (WITH RE= | A 0.0l FS o

SPECT TO VOLTAGE| B 0.1 FS 0 prevent conduction until it is desired, but also

0 V

SPECT TO VOLTAGE| B 0.1 FS 0 prevent conduction until it is desired, but also

~-?5 -20 -5 ~10 -5 [+] The anode voltage for the 7086 may be obtained

7086 V

~-?5 -20 -5 ~10 -5 [+] The anode voltage for the 7086 may be obtained

7086 may be accomplished by varying the amplitude to 180° minus the angle of lag. Maximum dc out

180

7086 may be accomplished by varying the amplitude to 180° minus the angle of lag. Maximum dc out-

phasing a peaked grid voltage with respect to the to 180°, no conduction occurs

180 V

phasing a peaked grid voltage with respect to the to 180°, no conduction occurs.

180°, change inamplitude of the grid voltage will adequate to swing the grid weli{ into the positive

180 V

180°, change inamplitude of the grid voltage will adequate to swing the grid weli{ into the positive

than 180°, change in amplitude of the grid voltage IW, N

180 V

than 180°, change in amplitude of the grid voltage IW, N

half-cycle of anode voltage. Initiation of con

4 V

half-cycle of anode voltage. Initiation of con- 3 4

connect the load to the anode voltage supply for

3 V

connect the load to the anode voltage supply for 3

to control the output voltage over a wider range, DUTY-PER CENT

-9435 V

to control the output voltage over a wider range, DUTY-PER CENT 02C5-9435

the anode voftage by about I7OO, conduction 7086 in AC Voltage Control Service

7086 V

the anode voftage by about I7OO, conduction 7086 in AC Voltage Control Service.

that the grid voltage lags the anode voltage by tude and lagging the anode vottage by about

900 V

that the grid voltage lags the anode voltage by tude and lagging the anode vottage by about 900,

less than 170°, tube conduction is initiated over to provide control of the dc output voltage from

170 V

less than 170°, tube conduction is initiated over to provide control of the dc output voltage from

peaked grid voltage is a preferred method in that circuit of Fig.6. When the timed gate provides

6 V

peaked grid voltage is a preferred method in that circuit of Fig.6. When the timed gate provides

voltage lags the anode voltage up to 1800, tube amperes which when multipliedby the value of

2.22 V

voltage lags the anode voltage up to 1800, tube amperes which when multipliedby the value of 2.22

in the positive half-cycle. The conduction angle, amperes. Starting at the 89-ampere,

100 A

in the positive half-cycle. The conduction angle, amperes. Starting at the 89-ampere, 100%-duty

AC Voltage Control TABLE

1 V

AC Voltage Control TABLE 1

60 CPS H lay = Average DC Output Current Pp = Peak Load Volt-amperes

60 V

60 CPS H lay = Average DC Output Current Pp = Peak Load Volt-amperes

Q O * k= 1/2 number of turns in secondary of transformer To

2 s

Q O * k= 1/2 number of turns in secondary of transformer To

(ACVoltage Controb 460

40 V

(ACVoltage Controb 460 - - - 40‘

(DC Voltage Control) 460 205 40

8 V

(DC Voltage Control) 460 205 40 8 -

(DC Voltage Control) 460 410 80

32.5 V

(DC Voltage Control) 460 410 80 32.5 -

’ Averaged over any period of 36 seconds max imum

36 s

’ Averaged over any period of 36 seconds max imum.

seconds and "off" period of 34 seconds. & Averaged over any period of 15 seconds max i mum,

15 s

seconds and "off" period of 34 seconds. & Averaged over any period of 15 seconds max i mum,

this 45° line, the average current through each amperes (left horizontal line of Fig

5 A

this 45° line, the average current through each amperes (left horizontal line of Fig.5}

supply voltage is 220 Direct Interelectrode Capacitances

220 V

supply voltage is 220 Direct Interelectrode Capacitances

Grid-Circuit Resistance. . . . . . . . 0.1 megohm The angle of phase retard is the angle by which th

0.1 ohm

Grid-Circuit Resistance. . . . . . . . 0.1 megohm The angle of phase retard is the angle by which the

Sufficient anode-circuit resistance, includ- MEf=2.5VOLTS AC

2.5 V

Sufficient anode-circuit resistance, includ- MEf=2.5VOLTS AC

control is available. If the grid voltage lags Fig.5 — Current Demand Characteristic of Type

5 V

control is available. If the grid voltage lags Fig.5 — Current Demand Characteristic of Type