David -
No, the problem is not the crystal. It is the _oscillator_. The oscillator is usually a more or less square-wave type, which is rich in harmonics. These harmonics are then radiated by the circuitry in the offending device, and make their way to your station. The function of the crystal is to control (stabilize) the frequency on which the oscillator operates. Color burst oscillator crystals are used so much because they are both inexpensive and easy to use. They are inexpensive because literally hundreds of missions of them are manufactured. For this reason, there have been created a large selection of IC chips that use the color burst frequency as the primary timing function for whatever device into which they are incorporated. Many of these chips are very simple to use, in most cases requiring no components other a chip (manufactured specifically for the intended function) and the crystal itself to create the desired device. - Jim, KL7CC David Guernsey wrote: > I realize it is the 4th harmonic. I do not have any problems with any > harmonics > of 3579 KHz except the 14316 KHz (4th harmonic). Thus, I wonder if the > problem > is really from the color burst crystal. > > 73s de Dave KJ6CBS > > > ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
