[TenTec] TXCO unit [OT]

[Martin Ewing]

Cheap PLLs, yes.  A lot depends on the quality of the
controlled oscillator.  You can use a PLL to steer a
crystal oscillator (oh so gently), and get minimal
phase noise.  Effectively, the crystal filters the
noise sidebands.  It could be a lot better than the
excellent Orion VFO, for example, which has to work
over a wide frequency band.

73, Martin, AA6E

p.s. I guess this confirms Dave's later note, FWIW!

--- David McClafferty <ve1adh at yahoo.ca> wrote:

> I am only going by what I have experienced and read,
> PLL's produce more phase noise than xtals
> oscillators.
> 
> Dave, VE1ADH
> 
>  --- John Clifford <johnclif at ix.netcom.com> wrote: 
> > > But why would you want to do it? Changing to a
> PLL
> > will 
> > > increase the phase noise.
> > 
> > Are you saying that having PLL control over the
> BFO
> > xtals would increase
> > phase noise? 
> > 
> > How?
> > 
> >  - jgc
> > 
> > John Clifford KD7KGX
> > 
> > Elecraft K2 #1678
> > /KSB2/KIO2/KBT2/KAT2/KNB2/KAF2/KPA100
> > Ten-Tec Omni VI/Opt1, Centaur, 238B
> > Alinco DR-605TQ, DJ-V5
> > Icom T90A
> > 
> > IRLP #3978
> > 
> > email: kd7kgx at arrl.net
> > 
> > _______________________________________________
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> >
> http://lists.contesting.com/mailman/listinfo/tentec
> >  
> 
>
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