Wednesday, April 14, 2010

Ceramic Resonators for VFO use

Not only crystals make suitable LOs, VXOs or super-VXOs, there are also VFOs designed with ceramic resonators. VFOs with ceramic resonators are not stable enough for QRSS or WSPR, however, CW or SSB do not require the same VFO stability as the digital mode.

Some resonator frequencies (MHz) I know about:
  • 2.00
  • 3.58
  • 4.00, 4.03, 4.16, 4.19, 4.50, 4.91
  • 5.00, 5.50, 5.74
  • 6.00, 6.50
  • 8.00, 8.64
  • 10.00, 10.70
  • 12.00
  • 16.00
In combination with some crystals, those resonators would make some awesome VFOs.


    3 comments:

    1. Box73 has 7.02 filters/resonators

      ReplyDelete
    2. True, with a filter made from 14.000 xtals, a nice CW-receiver is conceivable....

      ReplyDelete
    3. I have some 7.02 ceramic resonators sfe7,02
      Peter
      weak_signals at yahoo.ca
      ve3gyy

      ReplyDelete