Check out Moyer Electronics for online versions of the NTE, ECG, and SK replacement guides, as well as free downloadable versions of the software. We have seen the SK software for sale, but it is an old DOS program hardly worth the trouble. The SK software does not appear to be available for download directly from TCE SK. The ECG software is no longer available for download from ECG following the acquisition of ECG by NTE. The NTE software can be downloaded on this NTE page. Make friends with a counter worker at your local parts house to get a free printed book (otherwise they charge a few bucks for them). Each company has traditionally published its own thick printed replacement guide or cross reference, and more recently computer software (the replacement guides and software also cross-reference each others part numbers). The universal replacement folks have always encouraged the use of their devices in new designs, but the relatively high cost of these devices has limited the practice.ĮCG and NTE use the same device numbering system, but the SK numbering system is completely different. When the Delco DTS line of power transistors were discontinued, SIE began using the ECG165 in their 300 volt downhole power supplies (the later schematics actually call for the ECG165). For example, the single most popular ECG and NTE transistor, the 123AP, replaces thousands of different OEM and industry standard ( JEDEC) part numbered transistors. The underlying concept is that each ECG, NTE, or SK numbered device can replace a group of other semiconductors. AnaLog on ECG, NTE, SK Replacement SemiconductorsĮCG / NTE / SK Replacement SemiconductorsĮCG, NTE, and SK are lines of universal replacement semiconductors.
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