[time-nuts] What is the best way to multiply a 10 Mhz

[Bill Hawkins]

So, two doublers for 40 MHz and a tripler for 30 and then
mix to get 70? What happens to phase noise when you do that?
Is it as bad as a PLL?

Seems like you ought to get adequate harmonic rejection.

What about six mixers to get 20, 30, 40, 50, 60, and 70 MHz?

Chips and tank coils are cheap, no?

Bill Hawkins


-----Original Message-----
From: Burt I. Weiner
Sent: Tuesday, December 21, 2010 1:39 PM

It would seem the most jitter free way to do it would be to simply 
multiply it up like we used to do.  Some reasonably Hi-Q LC circuits 
could make a nice flywheel and filter out other signals at the same 
time.  Once you have it to the desired signal frequency you could 
condition it to clock your DDS.

Am I missing something here?  Wouldn't be the first time, ya know!

Burt, K6OQK


>Subject: Re: [time-nuts] what is the best way to multiply a 10 Mhz
>         signal?
>
>
>On 21/12/10 16:35, Stephen Farthing wrote:
> > Hi everyone,
> >
> > I want to multiply the output from my Efratom 101 (10Mhz) to clock a DDS
at
> > 70 Mhz. Has anyone tried this?
> >
> > Regards,
> >
> > Steve G0XAR