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VT201 Pinout
basing pinout

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

 
VT201 Ratings
Vh Ih VaMax Vg2Max PaMax Pg2Max Cgk Cak Cga
25 0.3 200 117 10.0 1.25 16.0 13.5 0.3

 
VT201 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

 
VT201 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) 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)  KT32: KT32.pdf (63746 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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