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1、E I A 171-D 85 m 3234600 0028647 7 m ANSI/EIA-191-D-1984 APPROVED NOVEMBER 28, 1984 MEASUREMENT OF DIRECT INTERELECTRODE CAPACITANCES OF ELECTRON TUBES EI A- l 9 l -D (Revision of RS-191-C) JANUARY, 19 8 5 Engineering Department. I ELECTRONIC INDUSTRIES ASSOCIATION Copyright Electronic Components, A
2、ssemblies b ) it contains a method of measuring capacitance using standard commercial equipment sockets; and c it contains a technical statement added in para. 1.4 to define when to use the audio frequency method i n lieu of the RF or transmission methods, particularly when measuring low capacitance
3、s in an electron tube wherein exceptionally high shunting tube capacitances simultaneously exist in the same tube. These differences have been called.to the attention of the U.S.N.C. Technical Advisory Group (TAG) for IEC Technical Committee 39 (Electronic Tubes), and resolution of these differences
4、 will be sought in future meetings of TC39, their voluntary use by those other than EIA members, whether the . . A . Published by . Electronic Industries Association Engineering Department 2001 Eye Street, N.W. Washington, D.C. 20006 Copyright 1985 ,Electronic Industries Association PRICE: $9.00 . .
5、 Q NOTE: The prefix “RS“ is being deleted in favor of “EIA.“ eventually be reflected in all EIA Standards. editorial change to provide more positive identification of the source for the standard - there is no technical significance to the change. This change will This is simply an Copyright Electron
6、ic Components, Assemblies . . . . . . 5 . . . . . . . . . . 5 . . . . . . . . . . 6 . . . . , . . . . . 7 . , . . . . . . . . 9 . . . . . . . . . . 3, Standard Shields . . . . . . . . . . . . . . . . . . . . . . 1 0 4. Standard Cap Connectors . . . . . . . , , . . . . . . . . . . . . 15 5. SpecialTy
7、pes . . . . , . . . . , . . . . . . . . . 15 i Copyright Electronic Components, Assemblies capacitance to other objects shall be kept at a minimum. On all types, for elements terminated in two or more pins or leads, all such pins or leads shall be connected together. In those cases where two or more
8、 elements are internally connected,. the combination shall be treated as the major element of the combination. For example, a suppressor grid internally connected to the cathode shall be considered the cathode in the tables of connections, For directly heated filament types, the filament is the cath
9、ode electrode. The application of these principles to the capacitance normally measured in various types of tubes are indicated in Tables I to V inclusive. applications. TABLES OF CONNECTIONS OF ELECXRODES OF TUBE SEClTONS FOR MEASURING DIRECT INTERELECTRODE CAPACITANCES TABLE 1-RECEIVING TUBES. Cap
10、acitance Measure Between Ground Indirectly Heated Heater-Cathode Heater and cathode All other elements, Cathode Types Diode Plate-All Illate and (cathode Other units shields, metal parts, etc. -f- heater + shields + metal parts, etc. ) e Copyright Electronic Components, Assemblies (contct) Input (2)
11、 Signalgrid (2) and (all other elementa, shields, metal parta, etc.) output Plate and (all other elementa, shields, metal parts, etc.) Coupling Signal grid (I) and Ail other elements, signalgrid (2) shields, metal Signal Grid-Mixer Signal grid and All other elements, Plate mixer plate shields, metal
12、 parts, etc. R . F . Input Signal grid and (all other elements, shields, metal parts, etc.) Mixer plate and (all other elements, shields, metal parts, etc.) parts, etc. Mixer Output Converter Osc. Grid-Osc. Plate Osc. Input Osc. grid and (cathode Osc. plate Osc. grid and osc. plate All other element
13、s, shields, metal parts, etc. + heater -t- mixerplate + signal grid + shields + metal parts, etc.) + heater + mixer plate + signal grid + shields + metalparts, etc.) osc. output Osc. plate and (cathode Osc. grid O Osc. Input* Oso. grid and (all other elements, shields, metal parts, etc.) osc. output
14、* Cathode and (heater + Ose. grid mixer plate + signal grid + osc. plate + shields + metalparts etc,) Osc. Grid-Cathode* Osc. grid and cathode All other elements, shields, metal parts, etc. Osc. Grid-Mixer Plate* Osc. grid and mixer All other elements, plate shields, metal parts, etc. Osc. Grid-All
15、Except Osc. grid and (mixer Cathode Cathode plate + signalgrid + osc. plate + heater + shields + metal parts, etc,) Coupling Osc. double- sided deflection , parts, tc.) ._-. -.- Grid 1 - All Grid 1 and (all other elements, shields, metal . parts, etc.) D1 -c D2 D1 and D2 A l l other elements, D3-D4
16、D 3 and D4 All other elements, f s l d hll D1 and (all other elements, shieds, shields, metal parts, etc., except D1 and D2 rrhields, metal parts, etc, except D 3 and D4 - D 3 and (all other elements, shields, dements, shields, metal Pam, etc. ) Electros single+ metal parts, eh.) sided deflection _-
17、_-._F_ .,- 0% - Alt DI and (ail other dements, shields, metal parts, etc.) , . _- - nk-Alt Da and (all other elements, shields, metal parts, etc.) -_I -.: - i-wLc. I* 1) For ctbodc mg tubee t b int+iiffeE aI all other dements except anode at ground, Copyright Electronic Components, Assemblies s, etc
18、.) Output Plate and (grid + (Grounded Grid) racreen l- upareesor -F shields + metalparb, -. etc). Twin Triode, Tetrode, Doupling between Grid of one unit All other and plate of other elements; shields, . Pentode units (grid to plate) metal parts, etc, Plate of one unit All other Coupling between and
19、 plate of other . elements,.shieldB, - plate) I. . metal parts, eta. units (plate to units (General) one section and = . - elements, shields, electrode of other - metal parts, etc. .-. . : -Output Plate and (cathode + Grid : ; . . heater + screen i- .- Cathode, heater .* , Coupling between -Electrod
20、e of . All other *For hleh Dowet vftcuum tme6 employing metal sleeve-type Mes with the aleeve not connected Internalb to iint W e Din or electrode, the aleere shall float for all measurcments und shall not be connected to any meamrement oltcoit an are other metal art ta. _ _ 1.3 Conditions of Tests
21、1.3.1. For all tubes, interelectrode capacitances shall be measured with the cathode cold and with no direct 1.3.2 For all tubes, interelectrode capacitances shall be measured using one of the three following methods: 1) with standard capacitance sockets, 2) with commercial equipment sockets, or 3)
22、with leads connected directly to the tube terminals. 1.3.2.1 Standard Capacitance Sockets Interelectrode capacitance may be measured,using the standard capacitance sockets and the standard capacitance connectors described in Section 2, 4, and 5, -. voltages present unless otherwise specified. ,. - “
23、 . 1-3.2.2 Commercial Equipment Sockets . . Interelectrode capacitance may be Qeasured using commercial iquipment sockets. In those cases, measurement of the capacitmce shall be taken prior to the insertion of the tube base pins into the socket. This initial reading shall be subtracted from the read
24、ing made with the tube inserted, togive the- tnie capacitance between the elements under test. . . . - . Copyright Electronic Components, Assemblies and the capacitance from$ to ground is across a closely coupled low-impedance winding which does not affect the capacitance balance or the voltage supp
25、lied to the bridge. i - Fig, 1 (RF Bridge) Fig, 2 (Transmiasion) . 1,4.2 Transmission Method A circuit for measuring the direct interelectrode Figure 2. The radio frequency oscillator voltage current in the unknown tube capacitance is amplified and equivalent. The amplifier input is attenuated in va
26、rious ranges may be obtained. The oscillatwout operated from a coinmon control and calibrated in large capacitances are required across the input tances shunted across the input .and output is ne.gligible. standard capacitance or a resistor of negligible shunt capacitance which may be calibrated in
27、posi- tion. e isshown schematically in ng to the range desired. The y a tube voltmeter or its oscijator -output so that the nput attenuators may be steps. ft is to be noted that ffect of the tube capci- ev3ce is c.alibrated by using a known Copyright Electronic Components, Assemblies 3-8. Also doubl
28、e-ended outlines same aa 3-4 except for added top lead. 319 2-1, 2-2, 2-6, and 2-6. 320 6979, 7034, 7036 321 6979, 7034, 7035. 323 6166 324 6668, 6946, 6161, 6383 325 6181 326 7D21, 6613 327 6039 328 6618 329 6261 330 6181 Applicable Tube Types or Tube Outline Nos. e Copyright Electronic Components,
29、 Assemblies MAX. RADIUS ALLOWABLE ON ALL INTERNAL EOES No, 308 IITERHIL DOIS SOCKET FACEPLITE -.,- EITHER WIELD MAY DE IKOTlEO foR EASE f FIT No, 312 309 , - 6 o . .- J a . . NOTE: LOWER SHIELD MIY BE USE0 WITH WICLD .W. - . . NO. 31.1 c % F Copyright Electronic Components, Assemblies & Materials As
30、sociation Provided by IHS under license with ECA Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/30/2007 00:20:54 MDTNo reproduction or networking permitted without license from IHS -,-,- E I A 191-D 85 M 3234600 O028664 3 M No, 315 EIA- 191-D Page 13 No. 316 &MAX. RADIUS ALL
31、OWABLE ON ALL INTERNAL EOQEL No, 317 ALLOWAQLE ON ALL INTERNAL EDGES No. 318 1 I No. 319 Copyright Electronic Components, Assemblies & Materials Association Provided by IHS under license with ECA Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/30/2007 00:20:54 MDTNo reproduct
32、ion or networking permitted without license from IHS -,-,- ) - A 191-D 85 3234b00 0028bb5 5 = = EM-191-D Page 14 - No. 320 a 12“ . T 12“ I 1 c . 7 x -16 No. 323 -%.O05 DIA No. 321 I Copyright Electronic Components, Assemblies & Materials Association Provided by IHS under license with ECA Licensee=IH
33、S Employees/1111111001, User=Wing, Bernie Not for Resale, 03/30/2007 00:20:54 MDTNo reproduction or networking permitted without license from IHS -,-,- 5.1 The EIA-191-D Page 15 4 STANDARD GAP CONNECMIRS Standard cap connectors shall be made as ahown ia Figure 4, m m m CAP m“EcIyIBs Dsscriptbn A B C
34、 Medium %4 0.666 0.850 Smaii 2%4“=t %r 0.862 0.760 Miniature 944t* %4 0.242 0.760 (i) A thin insulating f i l m may be placed on surface Y. Acorn Tubes socket shown in & Figure4 v 5. SPECIAL TYPES Figure 6 shall be used to measure the capacitancm of p - I & MIN. 1 SLOT YAX. FMI pin WIDTH .OW* 8cOlTl tubes. , Copyright Electronic Components, Assemblies & Materials Association Provided by IHS under license with ECA Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/30/2007 00:20:54 MDTNo reproduction or networking permitted without license from IHS -,-,-