TDSL Tube data [6688]

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6688 Pinout


Note: pin 6 is an internal connection

6688 Substitutes

Close or identical	CV3998, E180F
Different rating or performance	EF861

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.

6688 Ratings

Vh V	Ih A	Cgk pF	Cak pF	Cga pF
6.3	0.3	7.5	3.0	0.018

6688 Application Data

Class	Va V	Vg2 V	Vg1 V	Ia mA	Ig2 mA	Ra Ω	S mA/V
Pentode	180	150	-1.3	13.0	3.3	90,000	16.5

6688 Data sheet links

Duncan''s Amp Pages	E180F: Acrobat PDF
The Valve Museum	E180F: html
oldradio.qrz.ru	E180F: html page, MK buizen handboek
Frank Philipse (Wildcat mirror - Jörg Jan Münter)	E180F: E180F.pdf (1069717 bytes) (cs), E180F.pdf (211981 bytes) (de), E180F.pdf (286327 bytes), E180F.pdf (286361 bytes) (de), E180F.pdf (839113 bytes)

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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