Gil, a good technique is to make a copy of the schematic, maybe even with magnification, to see more easily where the leads of the connector go, (to which components). Then, with a colored pencil, trace out each pin to what it is connected to (component), and evaluate what the reversed voltage situation was, and then, if it could have failed the component connected to the pin.
For example, consider that a capacitor might be connected to the pin you are tracing. If it is a ceramic disk, it is not polarity sensitive and likely would also be rated at a voltage high enough to withstand anything mis-connected to it. But, if the capacitor had been electrolytic, and the wiring problem placed a negative voltage on the positive side of the capacitor, you likely would want to change it, in case it has been compromised or stressed, even if it is not showing short or open at this time. In a like manner, you can find what active components, (transistors or ICs) might need to be swapped if they endured reversed voltages, or overvoltage, such as an input being connected to a DC bus voltage. GL and 73, Stuart K5KVH _______________________________________________ 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
