Like D O I used to believe that Crystals are Crystals My main use of crystals since the late 70's was Microprocessors
About 10 years ago I purchased some Microprocessors that suggested using a series resistor but did not suggest a precise value. I used the lower of the range of selected resistors and the recommended small capacitors and went on with my coding and debugging. After a couple of days the Microprocessor stopped working. After a day of troubleshooting I replaced the crystal and was back in business. Then a couple of days later the crystal broke. Replaced it and upped the Resistor value. I cut the metal can off the broken Crystals and found they were fractured. Next I cut the cans off about half a dozen good crystals and found (much to my horror) no 2 alike in physical appearance. Data from the manufacturer is mostly non existent. I remember reading something from Karlton on this list a few years ago about him testing batches of these Multiplex Crystals. He said that he rejected a batch of them because they were not on frequency. I got a warm feeling from that. Ross Lewis RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED] Please note that subscribe and unsubscribe messages must be sent in text only format with MIME turned off.
