TDSL Tube data [12X4]

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12X4 Pinout

12X4 Substitutes

Different filament voltage

6X4, CV493, CV8203, CV8223, CV8237, EZ90, U78

Warning: Substitutes are given as a guide only - please refer to original manufacturers data sheets to ensure that a substitute is safe and appropriate for your application.

12X4 Ratings

Vh V	Ih A
12.6	0.3

12X4 Application Data

RMSin V	Irect mA	Notes
360-0-360	90	Ia pk = 245mA

12X4 Data sheet links

Peter Millett	12X4: Acrobat PDF 25K 6X4: Acrobat PDF 499K
The Valve Museum	6X4: html, html2
oldradio.qrz.ru	12X4: MK buizen handboek
Frank Philipse (Wildcat mirror - Jörg Jan Münter)	12X4: 12W6GT.pdf (35806 bytes), 12X4.pdf (148549 bytes), 12X4.pdf (56806 bytes), 6V6.pdf (565224 bytes), 6X4.pdf (376421 bytes) 6063: 6063.pdf (60980 bytes) 6X4: 6X4.pdf (145671 bytes), 6X4.pdf (47067 bytes), 6X4.pdf (486681 bytes), 6X4.pdf (551501 bytes) U78: U78.pdf (118422 bytes)
TubeZone	6X4: pdf

Bold designators are close or identical, Italic designators are different ratings, different pinouts or different filament voltages. Please see the substitutes at the top of the page for more details

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