That's 60% more current capacity and twice the power dissipation for an additional 25 cents each (or one dollar for a set of four). If you have to replace the group, and you have 2N3055s and don't want to go to 2N5686s at least replace them with 2N3773s. And don't go down in ratings - if you find 2N3771s do not replace them with 2N3055s. Always replace a dead pass transistor with an identical part number, or if you can't find one, replace all four as a group. The emitter ballast resistors do their balancing act only when the transistors are similar. LOOK at the table on transistor ratings - in his article. Specifically, read Skipp May, WV6F comments on newer (rugged) pass transistors offerings (a bit more expensive), such as the 2N5696. On the Repeater Builders' web page - READ Mike Morris, WA6ILQ compilation of Notes for Astron/Linear Power supply construction and repair, HERE: Here is the SEITS original web page (back on Internet). 2VCEO = 40V IC = 0.7A 9.67 (0.381)All Semelab hermetically sealed products 9.38 (0.369)0.50 (0.020)0.26Ĭontinental Device India LimitedAn ISO/TS 16949, ISO 9001 and ISO 14001 Certified CompanyNPN SILICON PLANAR TRANSISTOR 2N3053 / 2N3053ATO-39Metal Can PackageGeneral Purpose TransistorsABSOLUTE MAXIMUM RATINGSDESCRIPTION SYMBOL 2N3053 2N3053A UNITCollector Emitter Voltage VCEO 40 60 VCollector Base Voltage VCBO 60 80 VEmitter Base Voltage VEBO 5.You are reading the PDF verison of David Metz, WA0AUQ's November 1996 SEITS article (I actually created this Adobe Acrobat, when the SEITS web site was 'off-line' for about six months).
0.127 (0.005)Reliability Applications 1 3Bipolar NPN Device.
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