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PL500 Pinout
basing pinout
Note: Pin 9 is an internal connection


PL500 Substitutes
Close or identical 27GB5, CV10725
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.


PL500 Ratings
Vh Ih VaPeak PaMax Pg2Max Notes
27 0.3 7,000 12 5.0 pa/pg2 maximums not simultaneous


PL500 Application Data
Class Va Vg2 Ia Ig2
Line output 230 200 100 10.0


PL500 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: html, html2
oldradio.qrz.ru PL500: html page, MAZDA Valves & Picture Tubes Data, MK buizen handboek
Frank Philipse (Wildcat mirror - Jörg Jan Münter) PL500: 6GB5.pdf (411522 bytes), 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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