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![]() What's a "hound dog crystal"? How to deal with butlers: http://etext.library.adelaide.edu.au...chapter41.html Best regards, Spehro Pefhany Thanks Spehro. Delightful! I wondered what it had to do with things until down the page a bit. Sorry for the lack of definition, I was referring to crystals not specifically treated to enhance overtone operation. When a manufacturer makes a crystal for overtone use, he/she treats it to suppress spurious responses close by the desired overtone so the crystal "likes" to operate properly. An untreated crystal often will have those responses and oscillate on one or more of them instead of the desired frequency unless the feedback and tuned circuit are carefully managed to ignore them. The higher impedance of Stephensens schematic make that a bit easier to do. Regards W4ZCB |
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