[time-nuts] TimeNuts Assistance Request (Didier Juges)
Baragwanath, Chris (TSG)
ChrisB at tsogosun.com
Mon Jul 21 03:07:08 EDT 2008
Hi Didier,
Yes, the 440Hz is primarily a reference for tuning musical instruments
or calibrating tuners (i.e. PC sound cad based). In doing a little
"market research" as to the free frequency service, this freq. was
preferred to the normal 500Hz or 600Hz and still just within analog
telephone bandwidth.
Kind Regards,
-----Original Message-----
From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
Behalf Of time-nuts-request at febo.com
Sent: 18 July 2008 14:15
To: time-nuts at febo.com
Subject: time-nuts Digest, Vol 48, Issue 47
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"Re: Contents of time-nuts digest..."
Today's Topics:
1. Re: Power splitter on the Thunderbolt units (Tom Van Baak)
2. Re: Power splitter on the Thunderbolt units (David Ackrill)
3. AUSTRON LORAN-C TRF RECEIVER MODEL 2082 (Stanley Reynolds)
4. Re: Lucent RFTG-m-RB (Scott Mace)
5. Re: Thunderbolt monitor (d.seiter at comcast.net)
6. Re: Thunderbolt monitor (d.seiter at comcast.net)
7. Re: Thunderbolt monitor (Neville Michie)
8. change in email address (billh40 at aol.com)
9. TimeNuts Assistance Request (Baragwanath, Chris (TSG))
10. Re: TimeNuts Assistance Request (Didier Juges)
----------------------------------------------------------------------
Message: 1
Date: Thu, 17 Jul 2008 09:31:51 -0700
From: "Tom Van Baak" <tvb at LeapSecond.com>
Subject: Re: [time-nuts] Power splitter on the Thunderbolt units
To: "Discussion of precise time and frequency measurement"
<time-nuts at febo.com>
Message-ID: <000801c8e82a$a244d6b0$0900a8c0 at pc52>
Content-Type: text/plain; format=flowed; charset="Windows-1252";
reply-type=original
> What is the power splitter glued on some of the Thunderbolt units
meant for ?
> Apparently it is good up to 500 MHz, so it can't be used for the
signal coming from the antenna.
> Maybe it was just part of complete product which the Thunderbolt was
part of.
> Just curious....
>
> 73 Alberto I2PHD
It was used with the 10 MHz output; either to split the output or to
combine with a phased locked 10 MHz backup source (we've seen this on
other telecom frequency references).
Some of the Thunderbolts in the group buy had the splitter removed
(those with screws from the outside). Others came with splitters screwed
from the inside and it was too much bother to remove the splitter from
each unit before shipment.
You can remove the thing yourself by opening up the case.
/tvb
------------------------------
Message: 2
Date: Thu, 17 Jul 2008 18:10:37 +0100
From: David Ackrill <dave.g0dja at tiscali.co.uk>
Subject: Re: [time-nuts] Power splitter on the Thunderbolt units
To: Discussion of precise time and frequency measurement
<time-nuts at febo.com>
Message-ID: <487F7D0D.9030806 at tiscali.co.uk>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Tom Van Baak wrote:
>
> It was used with the 10 MHz output; either to split the output or to
> combine with a phased locked 10 MHz backup source (we've seen this on
> other telecom frequency references).
Sounds like a nice little 'freebe' for some. :-)
I can understand that it would be better to remove it to keep P&P costs
under control though.
Dave (G0DJA)
------------------------------
Message: 3
Date: Thu, 17 Jul 2008 12:05:47 -0700 (PDT)
From: Stanley Reynolds <stanley_reynolds at yahoo.com>
Subject: [time-nuts] AUSTRON LORAN-C TRF RECEIVER MODEL 2082
To: time-nuts at febo.com
Message-ID: <114310.18332.qm at web30303.mail.mud.yahoo.com>
Content-Type: text/plain; charset=iso-8859-1
Any info available ?
?
Name is a little misleading as this unit is?RF filters and preamp.
?
Contains?4 adjustable?filters first is switch selectable for peek or
null, other 3 are null, and one band pass filter 29Khz to 100Khz. May be
similar to 2084 Multifilter one output shared between front and rear
panels and no Sferics warning lamp .
------------------------------
Message: 4
Date: Thu, 17 Jul 2008 16:43:20 -0500
From: Scott Mace <smace at intt.net>
Subject: Re: [time-nuts] Lucent RFTG-m-RB
To: Discussion of precise time and frequency measurement
<time-nuts at febo.com>
Message-ID: <487FBCF8.1010200 at intt.net>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
When you have a RFTG-m-XO and Rb pair, do you connect both
J5 and J6 on each unit or just J5?
Scott
Scott Mace wrote:
> Has anyone tried to discipline the RFTG-m-RB without the -XO unit from
> a house PPS feed?
>
> I think pins 4 and 8 on J6 are the PPS input.
>
> Scott
>
> _______________________________________________
> time-nuts mailing list -- time-nuts at febo.com To unsubscribe, go to
> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> and follow the instructions there.
>
>
------------------------------
Message: 5
Date: Thu, 17 Jul 2008 22:35:06 +0000
From: d.seiter at comcast.net
Subject: Re: [time-nuts] Thunderbolt monitor
To: Discussion of precise time and frequency measurement
<time-nuts at febo.com>, Discussion of precise time and frequency
measurement <time-nuts at febo.com>
Message-ID:
<071720082235.22631.487FC91A000CB7480000586722058891169D0A9B070A9CD20B at c
omcast.net>
Content-Type: text/plain
I too have never seen one go dim. In fact, I have a VCR (Beta!) that's
been pluged in continously since I got it new in the early '80s. It
still looks the same as when I got it except that the display has had a
left to right wave going through it since about 1995. So, wavy- but not
dim at all.
-Dave
-------------- Original message --------------
From: Jeffrey Pawlan <jpawlan at pawlan.com>
> Regarding the VFD display, although they may be very different one
> manufacturer to another, I can definitely dispute a prior statement
> made that VFDs in general have a short lifetime and become dim. They
> are universally used in VCRs, DVD players, microwave ovens, and some
> clocks. I have never had one become dim or burn out. The displays in
> my appliances are on even when the rest of the appliance is off. I
> have never seen one become dim even after 15 years of on-time.
>
> I look forward to your project.
>
>
> 73,
>
> Jeffrey Pawlan, WA6KBL
>
>
>
>
>
>
> _______________________________________________
> time-nuts mailing list -- time-nuts at febo.com To unsubscribe, go to
> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> and follow the instructions there.
------------------------------
Message: 6
Date: Thu, 17 Jul 2008 22:35:06 +0000
From: d.seiter at comcast.net
Subject: Re: [time-nuts] Thunderbolt monitor
To: Discussion of precise time and frequency measurement
<time-nuts at febo.com>, Discussion of precise time and frequency
measurement <time-nuts at febo.com>
Message-ID:
<071720082235.22631.487FC91A000CB7480000586722058891169D0A9B070A9CD20B at c
omcast.net>
Content-Type: text/plain
I too have never seen one go dim. In fact, I have a VCR (Beta!) that's
been pluged in continously since I got it new in the early '80s. It
still looks the same as when I got it except that the display has had a
left to right wave going through it since about 1995. So, wavy- but not
dim at all.
-Dave
-------------- Original message --------------
From: Jeffrey Pawlan <jpawlan at pawlan.com>
> Regarding the VFD display, although they may be very different one
> manufacturer to another, I can definitely dispute a prior statement
> made that VFDs in general have a short lifetime and become dim. They
> are universally used in VCRs, DVD players, microwave ovens, and some
> clocks. I have never had one become dim or burn out. The displays in
> my appliances are on even when the rest of the appliance is off. I
> have never seen one become dim even after 15 years of on-time.
>
> I look forward to your project.
>
>
> 73,
>
> Jeffrey Pawlan, WA6KBL
>
>
>
>
>
>
> _______________________________________________
> time-nuts mailing list -- time-nuts at febo.com To unsubscribe, go to
> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> and follow the instructions there.
------------------------------
Message: 7
Date: Fri, 18 Jul 2008 08:50:34 +1000
From: Neville Michie <namichie at gmail.com>
Subject: Re: [time-nuts] Thunderbolt monitor
To: Discussion of precise time and frequency measurement
<time-nuts at febo.com>
Message-ID: <E1851E65-B63F-4DF7-8F02-2CA2D0F754CC at gmail.com>
Content-Type: text/plain; charset=US-ASCII; delsp=yes; format=flowed
From my thermionic valve days,
the emmissivity of a filament was greatly extended by under-running
them.
If the display is pemanently run at a lower current in dim mode, how
long could the life be extended by dropping the filament voltage by a
small margin?
cheers, Neville Michie
On 18/07/2008, at 8:35 AM, d.seiter at comcast.net wrote:
> I too have never seen one go dim. In fact, I have a VCR (Beta!)
> that's been pluged in continously since I got it new in the early
> '80s. It still looks the same as when I got it except that the
> display has had a left to right wave going through it since about
> 1995. So, wavy- but not dim at all.
>
> -Dave
>
>
> -------------- Original message --------------
> From: Jeffrey Pawlan <jpawlan at pawlan.com>
>
>> Regarding the VFD display, although they may be very different one
>> manufacturer to another, I can definitely dispute a prior statement
>> made that VFDs in general have a short lifetime and become dim. They
>> are universally used in VCRs, DVD players, microwave ovens, and some
>> clocks. I have never had one become dim or burn out. The displays in
>> my appliances are on even when the rest of the appliance is off. I
>> have never seen one become dim even after 15 years of on-time.
>>
>> I look forward to your project.
>>
>>
>> 73,
>>
>> Jeffrey Pawlan, WA6KBL
>>
>>
>>
>>
>>
>>
>> _______________________________________________
>> time-nuts mailing list -- time-nuts at febo.com To unsubscribe, go to
>> https://www.febo.com/cgi-bin/mailman/
>> listinfo/time-nuts
>> and follow the instructions there.
> _______________________________________________
> time-nuts mailing list -- time-nuts at febo.com To unsubscribe, go to
> https://www.febo.com/cgi-bin/mailman/listinfo/
> time-nuts
> and follow the instructions there.
------------------------------
Message: 8
Date: Thu, 17 Jul 2008 21:17:40 -0400
From: billh40 at aol.com
Subject: [time-nuts] change in email address
To: time-nuts at febo.com
Message-ID: <8CAB68B34B01C27-167C-1AEF at FWM-D20.sysops.aol.com>
Content-Type: text/plain; charset="us-ascii"
change in email address:
??? was: ????????????????????????????????????? is:
?? billh40 at aol.com?????????????????????? billh40 at gmail.com
Thanks,
Bill Hanna
------------------------------
Message: 9
Date: Fri, 18 Jul 2008 11:42:45 +0200
From: "Baragwanath, Chris (TSG)" <ChrisB at tsogosun.com>
Subject: [time-nuts] TimeNuts Assistance Request
To: <time-nuts at febo.com>
Message-ID:
<DF39C0236E01174A915F25B2A3712CB233A915 at tsgexch01.gaming.tsogosun.com>
Content-Type: text/plain; charset="US-ASCII"
Hi all Time Nuts,
I am a 'side line' member of the mailing list, ex Broadcast engineer
whose principle fascination is accurate pendulum clocks and as one who
has been lucky enough to have been in the presence of the ultimate
"Clock" here in South Africa, the SAST (South African Standard Time)
cluster.
We do not have a "free to air" telephonic Time and Freq service in SA as
the NIST does and our principle RF source (ZUO_ has long been
discontinued for economic reasons (Other than the distant low power
coastal stations the transmit a few mins a day for shipping purposes).
The former Govt Labs and Standards Authorities are now privatised to
lessen the burden on the fiscus and supposed to be self supporting, so
charge and arm and a leg for access to their facilities, that our tax
money paid for in the first place)
At present, radio propagation conditions are so poor that and of the
NIST and other stations are unusable as a tone reference or 1 pulse per
second reference, and so have to call the NIST land line number, which
is an expensive call from South Africa.
As a voluntary / community service, we are trying to establish a freely
accessible tone and pulse service and are looking for a donation of any
unwanted equipment that will help us get a more stable 440hz and 1 PPS
reference running. (The current oscillator is a good old uncompensated
crystal British Ferrograph Test Set from broadcast days interrupted by
another uncompensated xtal osc which interrupts the tone to prove the
PPS output).
Any donation of unwanted equipment, especially of more stable equipment
or the ultimate, a GPS Rx board with 1 PPS output would be greatly
appreciated.
If anyone is prepared to help, I would be most grateful and would cover
the shipping costs to SA.
The mains in SA is 220v 50hz, but do have access to a 120v 60hz sinewave
inverter unit to safely power US spec equipment.
Many thanks in advance,
Kind regards,
Chris D Bagwanath
"Its About Time"
chris at baragwanath.co.za
Tel +27 83 700 5057
Fax: +27 11 792 166
------------------------------
Message: 10
Date: Fri, 18 Jul 2008 07:14:18 -0500
From: "Didier Juges" <didier at cox.net>
Subject: Re: [time-nuts] TimeNuts Assistance Request
To: "'Discussion of precise time and frequency measurement'"
<time-nuts at febo.com>
Message-ID: <00a601c8e8cf$ce25fed0$0a01a8c0 at didierhp>
Content-Type: text/plain; charset="US-ASCII"
Chris,
What is the 440Hz used for, other than tune instruments?
Didier
> -----Original Message-----
> From: time-nuts-bounces at febo.com
> [mailto:time-nuts-bounces at febo.com] On Behalf Of Baragwanath, Chris
> (TSG)
> Sent: Friday, July 18, 2008 4:43 AM
> To: time-nuts at febo.com
> Subject: [time-nuts] TimeNuts Assistance Request
>
> Hi all Time Nuts,
>
> I am a 'side line' member of the mailing list, ex Broadcast engineer
> whose principle fascination is accurate pendulum clocks and as one who
> has been lucky enough to have been in the presence of the ultimate
> "Clock" here in South Africa, the SAST (South African Standard Time)
> cluster.
>
> We do not have a "free to air" telephonic Time and Freq service in SA
> as the NIST does and our principle RF source (ZUO_ has long been
> discontinued for economic reasons (Other than the distant low power
> coastal stations the transmit a few mins a day for shipping purposes).
> The former Govt Labs and Standards Authorities are now privatised to
> lessen the burden on the fiscus and supposed to be self supporting, so
> charge and arm and a leg for access to their facilities, that our tax
> money paid for in the first place)
>
> At present, radio propagation conditions are so poor that and of the
> NIST and other stations are unusable as a tone reference or 1 pulse
> per second reference, and so have to call the NIST land line number,
> which is an expensive call from South Africa.
>
> As a voluntary / community service, we are trying to establish a
> freely accessible tone and pulse service and are looking for a
> donation of any unwanted equipment that will help us get a more stable
> 440hz and 1 PPS reference running.
> (The current oscillator is a good old uncompensated crystal British
> Ferrograph Test Set from broadcast days interrupted by another
> uncompensated xtal osc which interrupts the tone to prove the PPS
> output).
>
> Any donation of unwanted equipment, especially of more stable
> equipment or the ultimate, a GPS Rx board with 1 PPS output would be
> greatly appreciated.
>
> If anyone is prepared to help, I would be most grateful and would
> cover the shipping costs to SA.
>
> The mains in SA is 220v 50hz, but do have access to a 120v 60hz
> sinewave inverter unit to safely power US spec equipment.
>
> Many thanks in advance,
>
>
> Kind regards,
>
>
> Chris D Bagwanath
> "Its About Time"
>
> chris at baragwanath.co.za
> Tel +27 83 700 5057
> Fax: +27 11 792 166
>
>
>
>
>
>
>
>
>
> _______________________________________________
> time-nuts mailing list -- time-nuts at febo.com To unsubscribe, go to
> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> and follow the instructions there.
------------------------------
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