Fred, First, keep resistance readings made with an analog ohmmeter far away from IC devices. The voltages used can turn on (saturate) circuits and not only cause incorrect/misleading readings, but in some cases could damage solid state devices. Even the inexpensive DMMs will provide good readings for you, and these range from the less than $10 DMMs from places like Harbor Freight Tools to expensive models - the inexpensive models are much slower to settle the reading and often have limited ranges, but they are adequate for the basic tasks.
Your questions on device bases (how the pins are numbered) can be best answered by referring you to basing diagrams. While ICs follow a standard convention, transistors vary in their basing designation. Look at the first sheet of the schematics in Appendix B of the K2 manual to see the basing diagrams for devices used in the K2. 73, Don W3FPR > -----Original Message----- > > I've started building K2 # 5422, and have finished > Control Board. > > Couple of dumb questions - might keep my "ship" on > course: > > 1. What is "numbering convention" of standard IC > packages - starting > with Pin 1 - does numbering go down that side and wrap > back on other > side, back to pin across from Pin 1? (I know this is > basic, but .....) > > 2. What is the "lettering convention" of standard > TO-92 > transistor packages - from front flat side? > (collector, > base, etc.) > > 3. Measuring all the ohmeter resistance checks at the > end of Control > Board section - I'm getting some resistance readings > much less than > manual's table values? (I'm using an analog meter VM) > > I might try to send Control Board (# 5422) back to > Elecraft's support > desk, for a checkup of this first board - for peace of > mind. > > _______________________________________________ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
