Gary Schafer wrote:
On Thu, 23 Feb 2006 21:51:09 -0500, Ken Scharf
wrote:
Gary Schafer wrote:
I have a homebrew project that I need some crystals for. Need the
following:
3.300 mhz
3.500 mhz
10.5 mhz
17.5 mhz
24.5 mhz
Prefer HC6 holders if you have them. Any help out there?
Thanks!
Gary K4FMX
Please reply to
Building a 2B clone eh?
Kind of. It is a converter for a BC453 (Q5er) that I built many years
ago. It now uses only one 3.5 Mhz crystal, dual conversion, for all
bands. Trying to clean up some of the image problems.
73
Gary K4FMX
Since all the frequencies in question are harmonics of 3.5mhz
(except 3.3mhz) you could use a PLL to generate them by phase
locking a vco to the harmonics of a 3.5mhz oscillator.
Use a divide by N circuit to divide down the vco output to
3.5mhz and have a phase detector compare the output of the
divider with the 3.5mhz oscillator. Properly shielded,
this pll would be as clean as the crystal oscillator.