I recently picked up a very old (~1962) HP 104AR oscillator. After
replacing three bad Tantalum capacitors, it's working fine. The
frequency is a few PPM low, but I'll leave it for a month or two before
I try to adjust it. ADEV is measuring < 5e-11 from 2 to > 2000 sec. as
compared to an
Tom,
Thanks very much, that's a great list and will keep me busy for some time.
At the hobbyist level, are there time interval counters or frequency
counters that are particularly popular, and/or that pair well with the
listed software?
Frank
On 3/25/20 2:30 PM, Tom Van Baak wrote:
Hi
The amplifier board was sitting in mid air with no shielding. Stray pickup from
who
knows where *is* a possibility.
Bob
> On Mar 25, 2020, at 6:32 PM, John Miles wrote:
>
>> -Original Message-
>> From: time-nuts [mailto:time-nuts-boun...@lists.febo.com] On Behalf Of
>>
> -Original Message-
> From: time-nuts [mailto:time-nuts-boun...@lists.febo.com] On Behalf Of
> kb...@n1k.org
> Sent: Wednesday, March 25, 2020 9:46 AM
> To: 'Discussion of precise time and frequency measurement'
> Subject: Re: [time-nuts] Noise Floor
>
> Phase noise looks pretty good.
Frank,
The software that most of us use to create Allan deviation plots is free
and not that hard to use.
You will need ascii numerical phase or frequency data, e.g., from a time
interval or frequency counter.
1) Stable32, by Bill Riley
See:
Hi
Gain without an input termination will very much depend on the source you are
driving it from. With a
"proper" 50 ohm source, the gain will be 6 db high without the input resistor.
If it's got more gain than
that, your source is not 50 ohms. There are a lot of OCXO's out there that are
Taka Kamiya wrote:
I've been playing around with Clifton amplifier as well. Mine, input is
terminated with 50 ohm register, and rest is unmodified, so it has 6dB gain. I
have a 10dB pad on input side. I, too, noticed there will be a severe clipping
with driving it too hard.* * * I
Big thanks to Attila, Frank, and Taka for your responses to my questions
on my Trimble Thunderbolt.
I'm inclined to follow Taka's advice and reset the antenna elevation
mask angle with LH's FE command to something between 10 and 20 degrees.
I'm guessing that this is entered in degrees (i.e.
Hey folks! Re. mains frequency can I modify the scanner here?
I think its one of the EM 240 units made by Brennenstuhl
It reads voltage and current somewhat accurately, but not frequency.
-Andre
From: time-nuts on behalf of
I've been playing around with Clifton amplifier as well. Mine, input is
terminated with 50 ohm register, and rest is unmodified, so it has 6dB gain. I
have a 10dB pad on input side. I, too, noticed there will be a severe clipping
with driving it too hard. I plan to zero the gain and retest.
> Does someone here have recordings of the mains frequency of the west
> European Grid from the last weeks and from the same time last year?
> There is something I've been told which I would like to fact-check.
> I wasn't able to find anything online.
Is this of any use to you?
past 30 days:
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