Title imageTitle image

 Menu

Home
Tube data
Schematics
Software
Search engines

 

 Information

Help
Terms of use
News
Statistics
Credits
21LU8 Pinout
basing pinout

 
21LU8 Substitutes
Different filament voltage 16LU8, 16LU8A, 6LU8

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.

 
21LU8 Ratings
Vh
V		 Ih
A		 VaMax
V		 Vg2Max
V		 PaMax
W		 Pg2Max
W		 Notes
21 0.45 400 300 14.0 2.75 Pentode section
21 0.45 400 2.5 Triode section

 
21LU8 Application Data
Class Va
V		 Vg2
V		 Vg1
V		 Ia
mA		 Ig2
mA		 Ra
Ω		 S
mA/V		 Notes
A 135 120 -10.0 56.0 3.0 12,000 9.3 Pentode section
A 250 -4.0 2.3 16,000 3.6 Triode section

 
21LU8 Data sheet links
The Valve Museum 21LU8: html
Frank Philipse (Wildcat mirror - Jörg Jan Münter) 21LU8: 21LU8.pdf (82412 bytes), 6LU8.pdf (504376 bytes), 6LU8.pdf (83378 bytes)  16LU8A: 16LU8A.pdf (93184 bytes)  6LU8: 6LU8.pdf (549632 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

All content on this page is copyright 1997-2026 Duncan Amplification Limited.

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