Alberto wrote:
If you have a sound card capable of sampling at 192 kS/s, you don't need an SDR
to receive a signal at 60 kHz... just connect the output of an active antenna,
like
e.g. the mini-whip, directly to the Line-In of the sound card * * *
I used this method in the past to successful
Hi
The sample rate on a sound card is not always a good indication of it’s
performance. Some 192 KS/s cards have cutoff’s below 50 KHz. Others
have a noise spectrum that rises quite a bit past 30 or 40 KHz.
Lots to dig into ….
Bob
> On May 5, 2018, at 5:42 PM, Alberto di Bene wrote:
>
> If
If you have a sound card capable of sampling at 192 kS/s, you don't need an SDR
to receive a signal at 60 kHz... just connect the output of an active antenna,
like
e.g. the mini-whip, directly to the Line-In of the sound card, then use, for
example,
HDSDR as software, setting the sampling freque
Alex- how many turns on that loop?
Dana
On Sat, May 5, 2018 at 2:35 PM, Alexander Pummer wrote:
> tuned,[ fine-tuning with vari-caps remotely] large size frame antenna 1
> meter dia provides mV size 60kHz in the Livermore area in California from
> the Colorado WWVB TX
> 73
> KJ6UHN
> Alex
>
>
tuned,[ fine-tuning with vari-caps remotely] large size frame antenna 1
meter dia provides mV size 60kHz in the Livermore area in California
from the Colorado WWVB TX
73
KJ6UHN
Alex
On 5/5/2018 6:17 AM, Ulrich Rohde via time-nuts wrote:
I am trying to use the 60 KHz for synchronization of a
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I have found the proximity of my home computer has kept a bedroom projection
clock from locking to WWVB. Apparently the noise radiation from the computer
effectively jams the 60 kHz signal.
By setting the clock out on a deck about 30 feet further away from the
computer, the clock locks up ev
I have found the proximity of my home computer has kept a bedroom projection
clock from locking to WWVB. Apparently the noise radiation from the computer
effectively jams the 60 kHz signal.
By setting the clock out on a deck about 30 feet further away from the
computer, the clock locks up ev
Hi
If you want delay ( hardware delay and not propagation), calibrating a SDR
should not
be to nutty. Some boards ( the Lime SDR comes to mind) will generate a signal
as well
as receive one. That could be piped into a scope to make the measurement fairly
easy. Once you know what is going into th
Although it does not measure propagation delays, Lady Heather can now estimate
propagation delays. You can enter the lat/lon/alt of the station or specify
the station name. You can enter the ionosphere height, or Heather will
estimate it depending upon the month.
---
> I'd
Does anyone have a spare TAPR TNS-BUF amplifier which they would be willing to
sell? Many thanks.
Jim Robbins
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Hal,
Some SDRs can tune that low and should provide a means to determine
if noise is really the problem as well as give some clues as to the
character
of said noise. But they are much less likely to help with delay
determination,
unless you can figure out a practical way to ascertain the latency
Hi
Even if you get the 60 KHz process working, a $20 GPS module ( or maybe $50)
will
do a much better job. That’s not saying *don’t* do the WWVB stuff. Just realize
it’s
limitations. A second limitation is that the new phase modulation process makes
comparison a bit more complex.
60 KHz noi
contact me off list I have a couple Bert Kehren
In a message dated 5/5/2018 9:17:45 AM Eastern Standard Time,
time-nuts@febo.com writes:
I am trying to use the 60 KHz for synchronization of a Rb receiver. The local
NJ noise and the signal in dBuV are about the same with an active antenn
I am trying to use the 60 KHz for synchronization of a Rb receiver. The local
NJ noise and the signal in dBuV are about the same with an active antenna,
electric field. A better solution might be a ferrite selective antenna, H
field , if I find one.
73 de N1UL
In a message dated 5/5/20
Review/background: I have an UltraLink 333 WWVB receiver. It didn't work.
Several weeks ago. a discussion here mentioned that the phone cable between
the main box and antenna needs to be straight through rather than the typical
reversed. That was my problem. With the correct cable, the mete
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