It's probably a software bug in the NSA monitoring system that keeps
dropping some of the message content.
:)
----- Original Message -----
From: "ed breya" <e...@telight.com>
To: <time-nuts@febo.com>
Sent: Sunday, June 30, 2013 3:05 PM
Subject: Re: [time-nuts] wwvb 60 khz tuning fork crystals Some insights
If you're talking about the email processing, I think something's
going on. It sometimes take two or even three tries to get one
through, while the most recent one I just sent (about regulators)
went OK the first time. Let's see if this one does. B
BTW how do you guys get the thread to continue on from the current
message? I have only been able to copy and paste parts into the new
email, and that loses some of the links and formatting in some way. I
don't think this is the cause of the email problem above, since it
seems uncorrelated with any editing or whether I send a brand new
topic. I'm using an old version of Eudora (7.1.0.9), if that matters.
Ed
Ed strange no body and you sent it 3 days ago.
On Thu, Jun 27, 2013 at 12:13 AM, ed breya
<<https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts>eb at
telight.com> wrote:
> I presume you used the regular 74HC04 or 74HCU04 inverter, not the 74HC14
> Schmitt trigger input type?? If the '14 is actually used, that may
explain
> the problems around setting the feedback biasing resistor value - you may
> be overriding the built-in hysteresis to get it in the linear region.
> Usually that R isn't very critical with regular crystals, but maybe
tuning
> fork types need more gain, or, if it's actually a '14, the input
impedance
> is probably lower than a regular gate, so it's loading the resonator.
>
> Ed
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