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PC900 Pinout
basing pinout


PC900 Substitutes
Close or identical 4HA5
Different filament voltage 2HA5, 2HM5, 3HA5, 3HM5, 4HM5, 6HA5, 6HM5

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.


PC900 Ratings
Vh Ih Cgk Cak Cga
3.9 0.3 3.3 0.08 0.35


PC900 Application Data
Va Vg1 Ia Ra S
135 -1.0 11.5 5,250 14.5


PC900 Data sheet links
National Valve Museum PC900: html
oldradio.qrz.ru PC900: MAZDA Valves & Picture Tubes Data, MK buizen handboek
Frank Philipse PC900: .gif file, 010/p/PC900.pdf
Virtual Valve Museum PC900: HTML page
WPS 4HA5: html page


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