.. But, the key > thing is that one must be aware of the need to consider this problem, whi= ch > does not arise with a simple oscillator. > > > Which brings us back to my original question. Where can I get a custom frequency crystal to use in a Colpitts or Pierce circuit. When I were a lad and into amateur radio it was easy to buy custom crystals but, today, nuch harder --=20 __________________________________________ David C Brown 43 Bings Road Whaley Bridge High Peak Phone: 01663 733236 Derbyshire eMail: dcb.home@gmail.com SK23 7ND web: www.bings-knowle.co.uk/dcb --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .