[time-nuts] 4046 replacement

donald collie donaldbcollie at gmail.com
Mon May 7 06:34:21 EDT 2018

Thankyou to all who responded to my querie - I`ve got 5  74HCT9046BCN on a
slow boat from China. They will retrofit the projects where I used a 4046
without much pcb surgery. PLL`s are fun, especially when yo can watch them
lock on a Tek 7834   :-) I interloaned the weighty tome again, and am
having another read - it is "Phase Locked Loops : Design, Simulation, and
Applications" sixth edition - a good bedtime read!


On Mon, May 7, 2018 at 6:11 AM, Magnus Danielson <magnus at rubidium.dyndns.org
> wrote:

> Hi Charles,
> On 05/06/2018 06:08 PM, Charles Steinmetz wrote:
> > Magnus wrote:
> >
> >> If you use it without care and knowledge, beware. That goes for any
> >> tool we apply
> >
> > Indeed!  The Cardinal Rule of design!  (So often unfollowed....)
> >
> > "An engineer is someone who can figure out what questions need to be
> > asked, figure out how to answer them, and tell when they are correctly
> > answered."
> Indeed. I don't claim to be expert on the 4046 family of PLL chips, but
> at least I can share my experience and let you know about the things I
> learned from being bitten.
> Then, reading Gardners book, and advancing to full PI loop, I feel more
> comfortable about mixer or S/R-gate loops. The "magic" of some detectors
> have become less of a benefit for many designs. In general, most of my
> designs have become much simpler and robust. However, it's always good
> to have alternatives.
> Cheers,
> Magnus
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