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27GB5 Pinout
basing pinout
Note: Pin 9 is an internal connection


27GB5 Substitutes
Close or identical CV10725, PL500
Different rating or performance CV10955, PL504
Different filament voltage EL500, EL504

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.


27GB5 Ratings
Vh Ih VaPeak VaMax Vg2Max PaMax Pg2Max IkMax
27 0.3 7,700 275 275 17.0 6.0 275


27GB5 Application Data
Class Va Vg2 Vg1 Ia Ig2
Line output 75 200 -10.0 440 37.0


27GB5 Data sheet links
Dave Cigna''s Pages (DuncanAmps mirror) PL504: html
Duncan''s Amp Pages PL500: Acrobat PDF (8 pages)  PL504: Acrobat PDF (3 pages)
National Valve Museum PL500: html2  PL504: html
oldradio.qrz.ru PL500: MAZDA Valves & Picture Tubes Data  EL500: html page, MK buizen handboek
Frank Philipse (Wildcat mirror - Jörg Jan Münter) 27GB5: 6GB5.pdf (411522 bytes)  PL500: PL500.pdf (32250 bytes), PL500.pdf (484292 bytes)  EL504: EL504.pdf (17062 bytes), EL504.pdf (478818 bytes) (fr)  PL504: PL504.pdf (275215 bytes), PL504.pdf (36661 bytes) (fr)  EL500: EL500.pdf (35312 bytes), EL500.pdf (470327 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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