INCH-POUND

MIL-PRF-1/1204G
29 June 1999
SUPERSEDING
MIL-E-1/1204F
9 April 1975

PERFORMANCE SPECIFICATION SHEET

ELECTRON TUBE, CATHODE RAY

TYPE 1DP1

This specification is approved for use by all Depart-

ments and Agencies of the Department of Defense.

The requirements for acquiring the electron tube described herein

shall consist of this document and the latest issue of MIL-PRF-1.

DESCRIPTION: Miniature 1-inch, electrostatic deflection and focus.

PIN CONNECTIONS AND DIMENSIONS. See figure 1.

ABSOLUTE RATINGS:

Parameter: Ef Ec1 Ed Eb1 Eb2 Rg Zd Rd Alt

Unit: V V dc V V dc V dc Meg Meg Meg ft

Maximum: 6.9 0, -100 400 300 1,000 2 2 2 60,000

Minimum: 5.7 --- --- --- --- --- --- --- ---

Test conditions: 6.3 Adjust --- Focus 800 --- --- --- ---

See footnotes at end of table I.

GENERAL:

First article inspection: Required. 4/

AMSC N/A 1 of 5 FSC 5960

DISTRIBUTION STATEMENT A. Approved for public release; distribution is unlimited.
 MIL-PRF-1/1204G

TABLE I. Testing and inspection.

Limits
Inspection Method Notes Conditions Symbol Min Max Unit

Conformation inspection,
part 1

Voltage breakdown 5201 --- --- --- --- ---

Voltage breakdown 5201 --- --- --- --- ---

(electrostatic types)

Bulb, screen, and face- 5106 --- --- --- --- ---
plate quality

Modulation 5223 --- Light = 5 fL ∆Ec --- 40 V dc

Spot position (electro- 5231 --- Disp1 --- 4 mm

static deflection)

Grid cutoff voltage 5241 --- Ec1 --- -95 V dc

Grid No. 1 leakage current 5251 --- --- --- 5 µA dc

Anode No. 2 leakage 5251 --- --- --- 15 µA dc

current

Gas "cross" 5206 1/ Light = 5 fL --- --- --- ---

Spot displacement 5231 --- Disp1 --- 3 mm

(leakage)

Light output 5221 2/ Light 5 --- fL

Conformance inspection,
part 2

Heater current 1301 --- If 180 220 mA dc

Stray light emission 5216 --- Eb2 = 1,000 V dc --- --- --- ---
(conventional types)

Line width A 5226 --- Ik = 50 µA dc, Width --- 0.25 mm

(electrostatic deflection) 12 lines

Line width B 5226 --- Ik = 50 µA dc, Width --- 0.35 mm

(electrostatic deflection) 12 lines

Electrode current 5201 --- Ib1 -10 +10 µA dc

(anode No. 1)

Electrode current 5201 --- Light = 5 fL Ik --- 1 mA

(cathode)

Deflection factor 5248 --- ID2 DF 350 450 V dc/inch

Deflection factor 5248 --- 3D4 DF 250 350 V dc/inch

Angle between traces 5101 --- --- --- --- ---

Focusing voltage at cutoff 5246 --- Eb1 175 275 V dc

Base alignment 5101 --- ID2 between pin numbers 2 --- --- --- ---
(electrostatic types) and 3

Permanence of marking 1105 --- --- --- --- ---

See footnotes on next page.

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 MIL-PRF-1/1204G

TABLE I. Testing and inspection - Continued.

Limits
Inspection Method Notes Conditions Symbol Min Max Unit

Conformance inspection,
part 3

Life test --- --- Group C; Eb2 = 800 V dc; --- --- --- ---
t = 500 hours minimum;
light = 5 fL

Life test end points: ---

Grid No. 1 leakage 5251 --- --- --- 5 µA dc

current
Anode No. 2 leakage 5251 --- --- --- 15 µA dc
current
Stray light emission 5216 --- --- --- --- ---
(conventional types)
Line width A 5226 --- Width --- 0.50 mm
Line width B 5226 --- Width --- 0.75 mm
Modulation 5223 --- ∆Ec --- 50 V dc
Light output 5221 2/ Light 4 --- fL

Cathode illumination 5216 3/ --- --- --- ---

Barometric pressure, 1002 3/ 54 ± 5 mmHg --- --- --- ---

reduced

Pressure 1141 3/ --- --- --- ---

Direct-interelectrode 1331 3/ k to all Ck --- 2.5 pF

capacitance g1 to all Cg1 --- 5 pF
D1 to D2 C1D2 --- 1.25 pF
D3 to D4 C3D4 --- 1 pF
D1 to all CD1 --- 3 pF
D2 to all CD2 --- 4 pF
D3 to all CD3 --- 3 pF
D4 to all CD4 --- 3 pF

Vibration 5111 3/ Width --- 1.0 mm

Shock 5115 3/ --- --- --- ---

Base strain 1121 3/ --- --- --- ---

1/ This test is to be performed at the conclusion of the holding period.

2/ The light output shall be taken using a .500 by .500 inch (12.7 by 12.7 mm) raster of 35 to 105 lines and 60 frames per second. Ik =
500 µA dc.

3/ This test shall be performed during the initial production and once each succeeding 12-calendar months in which there is
production. A regular double sampling plan shall be used, with the first sample of three tubes with an acceptance number of zero,
and a second sample of three tubes with a combined acceptance number of one. In the event of failure, the test will be made as a
part of conformance inspection, part 2, code level D, with an acceptance level of 6.5. The regular "12-calendar month" double
sampling plan shall be reinstated after three consecutive samples have been accepted.

4/ First article inspection shall consist of performing all tests listed in this tube specification sheet. The sample size and allowable
defects shall be in accordance with MIL-PRF-1, qualification, samples, and acceptance criteria. Three copies of the test report,
prepared in accordance with MIL-STD-831, shall be forwarded to the purchasing activity for evaluation by the preparing activity.
Invitation for bids should provide that the preparing activity reserves the right to waive the requirements for first article samples as to
those bidders offering a product which has been previously acquired or tested by the Government, and that bidders offering such
products who wish to rely on such production or test, must furnish evidence with the bid that prior Government approval is presently
appropriate for the pending acquisition.

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 MIL-PRF-1/1204G

Dimensions Pin No Element

Ltr Inches Millimeters
Min Max Min Max 1 Grid No. 1
Qualification inspection 2 Deflector plate D1
F Base: E9-1 except for pin length 3 Deflector plate D3
Conformance inspection, part 2 4 Heater
A 2.917 3.004 74.09 76.30 5 Heater cathode
6 Deflector plate D2
B .750 .875 19.05 22.23
7 Anode No. 2
C 2.687 2.749 68.25 69.82
8 Anode No. 1
D .230 .255 5.84 6.48 9 Deflector plate D4
E .350 --- 8.89 ---

NOTE: Useful screen radius.

FIGURE 1. Outline drawing of electron tube type 1DP1.

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 MIL-PRF-1/1204G

Custodians: Preparing activity:

Army - CR DLA - CC
Navy - EC
Air Force - 11 (Project 5960-3532)
DLA - CC

Review activities:
Navy - AS, CG, MC, OS, SH
Air Force - 99