> What specifically were the details of the supposed issue with older > K3's? Does the RS-232 line in the K3 reverse bias the emitter junction > (exceed BVebo) of that transistor?
No. The KIO3 uses a twin-tee oscillator to generate to required negative voltage. This is to eliminate the typical charge pump as a source of receiver noise. About a year ago we changed the transistor used in this oscillator to a higher-gain device because a small number of KIO3 modules had marginal negative voltage. There is no degradation with time that I am aware of. 73, Lyle KK7P (guilty of designing the KIO3 module) ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
