TDSL Tube data [9A8]

Menu

Information

9A8 Pinout

9A8 Substitutes

Close or identical	CV8433, PCF80
Different filament voltage	17A8, 8A8

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.

9A8 Ratings

Vh V	Ih A	Cgk pF	Cak pF	Cga pF
9	0.3	2.5	1.8	1.5

9A8 Application Data

Class	Va V	Vg2 V	Vg1 V	Ia mA	Ig2 mA	Ra Ω	S mA/V
Triode	100		-2.0	14.0		4,000	5.0
Pentode	170	170	-2.0	10.0	2.8	400,000	6.2

9A8 Data sheet links

The Valve Museum	PCF80: html, html2, html3
oldradio.qrz.ru	PCF80: MAZDA Valves & Picture Tubes Data, MK buizen handboek
Frank Philipse (Wildcat mirror - Jörg Jan Münter)	9A8: 9A8.pdf (160444 bytes), 9A8.pdf (229329 bytes) PCF80: PCF80.pdf (139306 bytes) (fr), PCF80.pdf (1669106 bytes), PCF80.pdf (334080 bytes), PCF80.pdf (49758 bytes) (fr)

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

TDSL is advert free and is funded by voluntary donations. If you find the site useful, please consider making a small voluntary donation, thank you

Version: PHP release 1.16 22-Jan-2025