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U709 Pinout
basing pinout
Note: pins 2, 6, 8, and 9 are internal connections


U709 Substitutes
Close or identical 6CA4, CV3996, CV5072, EZ81

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.


U709 Ratings
Vh Ih
6.3 1.0


U709 Application Data
Class RMSin Irect Rser
FW rectifier 350-0-350 150 270


U709 Data sheet links
Duncan''s Amp Pages EZ81: Acrobat PDF (4 pages)
Peter Millett 6CA4: Acrobat PDF 97K
National Valve Museum EZ81: html, html2, html3, html4
oldradio.qrz.ru EZ81: MAZDA Valves & Picture Tubes Data, MK buizen handboek
Frank Philipse (Wildcat mirror - Jörg Jan Münter) 6CA4: 6BY6.pdf (790979 bytes), 6CA4.pdf (100420 bytes), 6CA4.pdf (283397 bytes), 6CA4.pdf (513540 bytes)  EZ81: EZ81.pdf (175448 bytes), EZ81.pdf (188644 bytes), EZ81.pdf (470907 bytes) (cs), EZ81.pdf (55720 bytes), EZ81.pdf (56774 bytes) (fr), EZ81.pdf (608378 bytes) (fr), EZ81.pdf (652247 bytes), EZ81.pdf (73322 bytes) (de)  U709: U709.pdf (140025 bytes)
TubeZone 6CA4: pdf

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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