On Thu, 26 Feb 2004 02:29:28 GMT, "Robert C Monsen"
wrote:

Using a crystal oscillator would obviously be better, but it sounds like he
is having trouble getting the range he needs out of it.

I'm mutiplying up and mixing down this time so getting enough spread
should be a piece of cake this time. The problem with your LC solution
is stability. This will be used for far field measurements at about an
eventual half-Watt output. I don't want to risk straying out of band,
but I do need to probe right up to the edges of it. The sweep
frequency will be controlled by a DC triangle generator voltage
applied to a varicap used as part of the crystal loading. I've
contrived it this way so I can carry out the mods on the filter
without having to keep going back and forth to the TX to vary the
output frequency. Yeah, maybe it's overkill but I've got the time
right now and nothing better to do. :-)

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