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VR502 Pinout
basing pinout

 
VR502 Substitutes
Close or identical CV1287, CV1502, KT32
Different rating or performance 25L6, 25L6GT, CV552, CV553, VT201, VT201C

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.

 
VR502 Ratings
Vh Ih VaMax Vg2Max PaMax
26 0.3 135 135 10.0

 
VR502 Application Data
Class Va Vg2 Vg1 Ia Ig2 Ra S Rk Zout Pout THD
A 200 110 -8.0 50.0 7.0 30,000 9.5 160 3,000 4.3 10
A 110 110 -7.5 49.0 4.0 13,000 9.0 2,000 2.1
A S/E 110 110 -6.0 60.0 4.0 95 1,600 2.3 6.5
A S/E 80 80 -4.5 44.0 4.0 95 1,600 1.2 9.5
AB1 P/P 135 135 -10.0 50.0 4.0 200 2,500 7.5 5

 
VR502 Data sheet links
Duncan''s Amp Pages KT32: Acrobat PDF
National Valve Museum KT32: html
oldradio.qrz.ru 25L6: Brans Vademecum, MK buizen handboek
Frank Philipse (Wildcat mirror - Jörg Jan Münter) KT32: KT32.pdf (63746 bytes)  25L6: 25L6.pdf (172763 bytes), 25L6.pdf (45146 bytes), 25L6.pdf (63037 bytes) (fr)  25L6GT: 25L6GT.pdf (171333 bytes), 25L6GT.pdf (341055 bytes), 25L6GT.pdf (69118 bytes), 50C5.pdf (246817 bytes), 6J7GT.pdf (111793 bytes) (fr)

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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