THe acronym PTO stands for permeability tuned oscillator. That means
it is a sliding slug in a coil that is responsible for the tuning of
the VFO instead of a variable capacitor. THis method lends itself to
the mechanical process of a tuning dial but apparently is more
susceptible to thermally-induced drift.
All TT rigs have the same basic VFO design: a PTO! --that is until
the OmniV and Paragon rigs.
My Omni-D/B and Omni/C both drift after a cold start. And yes I am
thinking of putting an appropriately sized heat source inside to fix
it. Or maybe a timer on the power supply.
Grant K7GT
73 de K7GT Grant Taylor
email: k7gt@hotmail.com or k7gt@qsl.net or k7gt@usa.net !
web page: http://www.qsl.net/k7gt
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