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Rien Eradus PA0JME
Hi all, upon switching on the shack this morning my first check is always the UK beacons GB3MHZ (1296.830 2320.830 and 3400.830). The first two are practically always audible imo not bad at 280km
Turning on the laptop with PI-RX I noticed the CW signal is wobbling about with about 50 Hz pkpk deviation with +/- 12sec period. Both beacons show this behaviour.
I cannot check the 9cm one since not audible/too weak
Switching on my HP generator produces a nice straight line on the PI-RX waterfall, so my LO seems OK.
Btw PI4 detection does not seem to work either due to LF wobble.
Can anyone confirm this behaviour too?
Best regards Rien PA0JME
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Rein, They are controlled from a common GPS. It has temporarily lost lock. The effect usually last less than 30 minutes.
73 de Sam, G4DDK, Part of the MHZ beacon team
On 17 Nov 2020, at 11:34, Rien Eradus PA0JME <pa0jme1952@...> wrote:
Hi all, upon switching on the shack this morning my first check is always the UK beacons GB3MHZ (1296.830 2320.830 and 3400.830). The first two are practically always audible imo not bad at 280km
Turning on the laptop with PI-RX I noticed the CW signal is wobbling about with about 50 Hz pkpk deviation with +/- 12sec period. Both beacons show this behaviour.
I cannot check the 9cm one since not audible/too weak
Switching on my HP generator produces a nice straight line on the PI-RX waterfall, so my LO seems OK.
Btw PI4 detection does not seem to work either due to LF wobble.
Can anyone confirm this behaviour too?
Best regards Rien PA0JME
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Rien Eradus PA0JME
Hi Sam, I already noticed the 'shortlived' wobbling before, but
now it lasts from 8:59 UTC switch on up till now 12:29 UTC, so
much longer than normal
best regards Rien
Op 17-11-2020 om 12:46 schreef SAM
JEWELL via groups.io:
toggle quoted messageShow quoted text
Rein,
They are controlled from a common GPS. It has temporarily
lost lock. The effect usually last less than 30 minutes.
73 de Sam, G4DDK,
Part of the MHZ beacon team
Hi all, upon switching on the shack this
morning my first check is always the UK beacons GB3MHZ
(1296.830 2320.830 and 3400.830). The first two are
practically always audible imo not bad at 280km
Turning on the laptop with PI-RX I noticed the CW signal
is wobbling about with about 50 Hz pkpk deviation with +/-
12sec period. Both beacons show this behaviour.
I cannot check the 9cm one since not audible/too weak
Switching on my HP generator produces a nice straight line
on the PI-RX waterfall, so my LO seems OK.
Btw PI4 detection does not seem to work either due to LF
wobble.
Can anyone confirm this behaviour too?
Best regards Rien PA0JME
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Ohhh! Once the present Covid 'thing' is over, and we can access the site, we wil be able to investigate the beacons. The 10GHz one needs replacing and a better GPS solution is required. Meanwhile the 3.4GHz beacon can provide a useful source for all the new UK 9cm band enthusiasts to calibrate their antenna systems.
73 de Sam, G4DDK
On 17 Nov 2020, at 12:31, Rien Eradus PA0JME <pa0jme1952@...> wrote:
Hi Sam, I already noticed the 'shortlived' wobbling before, but
now it lasts from 8:59 UTC switch on up till now 12:29 UTC, so
much longer than normal
best regards Rien
Op 17-11-2020 om 12:46 schreef SAM
JEWELL via groups.io:
Rein,
They are controlled from a common GPS. It has temporarily
lost lock. The effect usually last less than 30 minutes.
73 de Sam, G4DDK,
Part of the MHZ beacon team
Hi all, upon switching on the shack this
morning my first check is always the UK beacons GB3MHZ
(1296.830 2320.830 and 3400.830). The first two are
practically always audible imo not bad at 280km
Turning on the laptop with PI-RX I noticed the CW signal
is wobbling about with about 50 Hz pkpk deviation with +/-
12sec period. Both beacons show this behaviour.
I cannot check the 9cm one since not audible/too weak
Switching on my HP generator produces a nice straight line
on the PI-RX waterfall, so my LO seems OK.
Btw PI4 detection does not seem to work either due to LF
wobble.
Can anyone confirm this behaviour too?
Best regards Rien PA0JME
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Sam Just to confirm, from a local observation, that there is wobble on 23 and 13cms, and 9cms is nice and wobble-free ! The wobble is more obvious on 13cms, as you would expect. John G4ZTR
From: UKMicrowaves@groups.io [mailto:UKMicrowaves@groups.io] On Behalf Of SAM JEWELL via groups.io
Sent: 17 November 2020 13:03
To: UKMicrowaves@groups.io
Subject: Re: [UKMicrowaves] GB3MHZ beacons wobbling on both 23 and 13 cm Ohhh! Once the present Covid 'thing' is over, and we can access the site, we wil be able to investigate the beacons. The 10GHz one needs replacing and a better GPS solution is required. Meanwhile the 3.4GHz beacon can provide a useful source for all the new UK 9cm band enthusiasts to calibrate their antenna systems.
On 17 Nov 2020, at 12:31, Rien Eradus PA0JME <pa0jme1952@...> wrote: Hi Sam, I already noticed the 'shortlived' wobbling before, but now it lasts from 8:59 UTC switch on up till now 12:29 UTC, so much longer than normal best regards Rien Op 17-11-2020 om 12:46 schreef SAM JEWELL via groups.io: Rein, They are controlled from a common GPS. It has temporarily lost lock. The effect usually last less than 30 minutes. Part of the MHZ beacon team Hi all, upon switching on the shack this morning my first check is always the UK beacons GB3MHZ (1296.830 2320.830 and 3400.830). The first two are practically always audible imo not bad at 280km
Turning on the laptop with PI-RX I noticed the CW signal is wobbling about with about 50 Hz pkpk deviation with +/- 12sec period. Both beacons show this behaviour.
I cannot check the 9cm one since not audible/too weak
Switching on my HP generator produces a nice straight line on the PI-RX waterfall, so my LO seems OK.
Btw PI4 detection does not seem to work either due to LF wobble.
Can anyone confirm this behaviour too?
Best regards Rien PA0JME
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John, Maybe because 9cm is not GPS controlled! 73 de Sam
On 17 Nov 2020, at 16:02, John Lemay <john@...> wrote
Sam Just to confirm, from a local observation, that there is wobble on 23 and 13cms, and 9cms is nice and wobble-free ! The wobble is more obvious on 13cms, as you would expect. John G4ZTR From: UKMicrowaves@groups.io [mailto:UKMicrowaves@groups.io] On Behalf Of SAM JEWELL via groups.io
Sent: 17 November 2020 13:03
To: UKMicrowaves@groups.io
Subject: Re: [UKMicrowaves] GB3MHZ beacons wobbling on both 23 and 13 cm Ohhh! Once the present Covid 'thing' is over, and we can access the site, we wil be able to investigate the beacons. The 10GHz one needs replacing and a better GPS solution is required. Meanwhile the 3.4GHz beacon can provide a useful source for all the new UK 9cm band enthusiasts to calibrate their antenna systems.
On 17 Nov 2020, at 12:31, Rien Eradus PA0JME <pa0jme1952@...> wrote: Hi Sam, I already noticed the 'shortlived' wobbling before, but now it lasts from 8:59 UTC switch on up till now 12:29 UTC, so much longer than normal best regards Rien Op 17-11-2020 om 12:46 schreef SAM JEWELL via groups.io: Rein, They are controlled from a common GPS. It has temporarily lost lock. The effect usually last less than 30 minutes. Part of the MHZ beacon team Hi all, upon switching on the shack this morning my first check is always the UK beacons GB3MHZ (1296.830 2320.830 and 3400.830). The first two are practically always audible imo not bad at 280km
Turning on the laptop with PI-RX I noticed the CW signal is wobbling about with about 50 Hz pkpk deviation with +/- 12sec period. Both beacons show this behaviour.
I cannot check the 9cm one since not audible/too weak
Switching on my HP generator produces a nice straight line on the PI-RX waterfall, so my LO seems OK.
Btw PI4 detection does not seem to work either due to LF wobble.
Can anyone confirm this behaviour too?
Best regards Rien PA0JME
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Rien Eradus PA0JME
Hi all, just looked once more and both beacons seem to have
restored themselves and PI4 copies ok again
Best regards Rien
Op 17-11-2020 om 17:05 schreef SAM
JEWELL via groups.io:
toggle quoted messageShow quoted text
John,
Maybe because 9cm is not GPS controlled!
73 de Sam
On 17 Nov 2020, at 16:02, John Lemay
<john@...> wrote
Sam
Just
to confirm, from a local observation, that there is
wobble on 23 and 13cms, and 9cms is nice and
wobble-free ! The wobble is more obvious on 13cms,
as you would expect.
John
G4ZTR
Ohhh!
Once the present Covid 'thing' is
over, and we can access the site, we wil be able to
investigate the beacons. The 10GHz one needs
replacing and a better GPS solution is required.
Meanwhile the 3.4GHz beacon can
provide a useful source for all the new UK 9cm band
enthusiasts to calibrate their antenna systems.
Hi Sam, I already noticed the 'shortlived'
wobbling before, but now it lasts from 8:59 UTC
switch on up till now 12:29 UTC, so much longer
than normal
best regards Rien
Op 17-11-2020 om 12:46
schreef SAM JEWELL via groups.io:
Rein,
They are controlled from
a common GPS. It has temporarily lost lock.
The effect usually last less than 30
minutes.
Part of the MHZ beacon
team
Hi
all, upon switching on the shack this
morning my first check is always the
UK beacons GB3MHZ (1296.830 2320.830
and 3400.830). The first two are
practically always audible imo not bad
at 280km
Turning on the laptop with PI-RX I
noticed the CW signal is wobbling
about with about 50 Hz pkpk deviation
with +/- 12sec period. Both beacons
show this behaviour.
I cannot check the 9cm one since not
audible/too weak
Switching on my HP generator produces
a nice straight line on the PI-RX
waterfall, so my LO seems OK.
Btw PI4 detection does not seem to
work either due to LF wobble.
Can anyone confirm this behaviour too?
Best regards Rien PA0JME
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