(Hopefully this is not a duplicate post... hotmail has been having issues)
The FA1 is a small, USB powered frequency counter. You supply it with a 10
MHz reference and an input frequency of 1 .. 80 MHz. It outputs a text string
of the measured frequency every second. They cost around $80
Could be. They sell a aluminum mounting rod for use with a magnetic base which
mates with the unit perfectly, so I sorta assumed it was intentional. Tapering
helps prevents over tightening / over extension which could damage the casing.
Denny
> On Aug 30, 2019, at 10:49, Bryan _ wrote:
>
>
Or a mfg. defect and thus why on the surplus market.
-=Bryan=-
From: time-nuts on behalf of Denny Page via
time-nuts
Sent: August 29, 2019 7:39 PM
To: Discussion of precise time and frequency measurement
Cc: Denny Page
Subject: Re: [time-nuts] GPS Antennas
In message <5d68c7ef.6080...@telight.com>, ed breya writes:
>I think there may be some confusion over the "super-capacitor" term.
I did some characterization of various kinds of large capacitors
some years back, and my conclusion was that environmental effects
scale super-linearly with
Actually the leakage of at least some standard electrolytic capacitors can be
quite low if one waits long enough. I've seen a leakage as small as a few
nanoamps after several minutes at room temperature with randomly selected 100uF
capacitors.
Bruce
> On 30 August 2019 at 18:53 ed breya
I think there may be some confusion over the "super-capacitor" term.
Over the years, I've seen two types.
The most commonly encountered are the ones in consumer gear, for storing
charge to keep CMOS RAM alive during power outage and such, for a
reasonable amount of time. These may be from 47
