I would be interested, I think. Planning ahead for if the one I have for my
Thunderbolt fails, I guess. Are there different models or would a photo of the
input ports on mine be useful?
PS: Funny running into you here! :)
-Original Message-
From: time-nuts [mailto:time-nuts-boun...@
> On Aug 30, 2016, at 9:26 PM, Mark Sims wrote:
>
> The -12V is used to drive the RS-232 signals... it also eventually gets to
> the EFC dac so it can swing below ground. Also, the +12V gets to the DAC.
> Pay close attention to generating noise on these lines.
I’ve designed a prototype. I
I recently added code to Lady Heather to precisely calculate the sun position,
sunrise/solar noon/sunset times and the Equation of Time... Egad, what a deep,
dark rabbit hole that leads one down. And woe be unto thee that trusts any of
the online calculators. Results can be over 10 minutes of
The -12V is used to drive the RS-232 signals... it also eventually gets to the
EFC dac so it can swing below ground. Also, the +12V gets to the DAC. Pay
close attention to generating noise on these lines.
Also, when I did Lady Heather's temperature control PID (with great help from
Warren S
A little board to generate -12 and +5 from a 15 watt 12 VDC input wouldn’t be
too hard to design. If I put one out for $25, would anyone like one?
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A friend gave me an Efratom M-100 Rubidium standard to check out and
calibrate. I found a couple manuals to download, and they appear to be
pretty complete. Even have schematics!!
The unit belonging to my friend is p/n 70502-7. The manuals appear to be
for p/n 70502-1. Close to the front of