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6550 Pinout
basing pinout

 

6550 Substitutes
Close or identical CK6550
Different rating or performance CV5220, KT88, KT88S, KT88SC, KT90

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.

 

6550 Ratings

No information available

6550 Application Data
Class Va Vg2 Vg1 Ia Ig2 Ra S Rk Zout Pout THD Notes
A 400 225 -16.5 87.0 4.0 3,000 20.0
A 250 250 -14.0 140 12.0 15,000 11.0 1,500 12.5
AB1 U/L 40% 553 -75.0 2x50 4500 100 2.0
AB1 U/L 40% 453 -59.0 2x50 4000 70 2.0
AB1 U/L 40% 436 2x87 2x600 6000 50 1.5 B+ = 500V
AB1 U/L 40% 328 2x87 2x400 5000 30 1.0 B+ = 375V
AB1 triode 349 2x79 2x525 4000 17 1.5 B+ = 400V
AB1 triode 422 2x94 2x525 4000 31 1.5 B+ = 485V

 

6550 Data sheet links
Automatica 6550: html
Dave Cigna''s Pages (DuncanAmps mirror) 6550: html
Peter Millett 6550: Acrobat PDF 100K
Frank Philipse 6550A: 135/6/6550A.pdf
Triode Electronics 6550A: gif1, gif2, gif3, gif4, gif5, gif6, gif7
Virtual Valve Museum 6550: HTML page
WPS 6550: html page

 

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