Re: [time-nuts] Locked onto LORAN 8970 GRI Monday AM

Yes indeed. But the ole wwvb is keeping me pretty busy as is. If that was done it would be easy to build the loopstick up. I think I have an old wwvb loopstick and just need to change the tuning cap. On Tue, Feb 5, 2013 at 9:40 PM, Bill Riches wrote: > come on Paul - you need another project! >

Re: [time-nuts] Locked onto LORAN 8970 GRI Monday AM

come on Paul - you need another project! 73 B -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of paul swed Sent: Tuesday, February 05, 2013 9:30 PM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Locked o

Re: [time-nuts] Locked onto LORAN 8970 GRI Monday AM

One other comment. They can make the GRI anything they want so old tables don't really matter. They are also matching the X station to the master they are the same sig level and always have been looking at a scope. Still curious as to why you need the X station. I suppose it gives the rcvr 2 X the

Re: [time-nuts] LORAN in Europe

Thanks I have tried to work with these when the US LORAN went of the air. It was always very very marginal. On Tue, Feb 5, 2013 at 5:32 PM, Iain Young wrote: > For any European Time Nutters, I came across this today: > > http://www.loran-europe.eu/**news.php

Re: [time-nuts] Locked onto LORAN 8970 GRI Monday AM

Oh what a detour. It sounds like I may need to build a small loop stick antenna to see what that may do. I would agree that if you were at the station your needle or meter should have been pegged. I really don't need another project right now. :-) Regards Paul. On Tue, Feb 5, 2013 at 3:44 PM, Bill

Re: [time-nuts] Ultra Low Phase Noise 5 to 10 MHz Frequency Doubler

Am 05.02.2013 22:29, schrieb Rick Karlquist: This circuit was already in extensive use 40 years ago at Zeta Laboratories, where I used to work. It's an OK circuit but I don't see what advantage it has over a full wave bridge doubler. The performance of this circuit is dependent on the source imp

[time-nuts] LORAN in Europe

For any European Time Nutters, I came across this today: http://www.loran-europe.eu/news.php Iain ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instruction

Re: [time-nuts] Ultra Low Phase Noise 5 to 10 MHz Frequency Doubler

This circuit was already in extensive use 40 years ago at Zeta Laboratories, where I used to work. It's an OK circuit but I don't see what advantage it has over a full wave bridge doubler. The performance of this circuit is dependent on the source impedance of whatever is driving it, and the drive

Re: [time-nuts] Ultra Low Phase Noise 5 to 10 MHz Frequency Doubler

I would be interested in a board too, I don't see a pointer to any board files in the linked PDF. does anyone know if they are available? -Eric On Tue, Feb 5, 2013 at 11:42 AM, Dave M wrote: >> From: Adrian >> >> Hello, >> >> I'm forwarding the message below on behalf of Luciano, because there

Re: [time-nuts] Locked onto LORAN 8970 GRI Monday AM

Hi Stan, Now I am confused!! I have an 857 and 80 - 6 screwdriver in my car. Tuned it up on 3800, then looked at broadcast band - Distant stations 500 - 600 khz were coming in aboug s9. Heard 100khz about s1 - qth is 9 miles line of site from wildwood tower. Drove to Wildwood and down to the o

Re: [time-nuts] Racal 9420 OCXO schematic?

On 2/5/2013 6:00 AM, Marco IK1ODO -2 wrote: The subject says it all: anyone has the schematic of the Racal 9420 OCXO? A friend has one that stopped oscillating, and want to give it a try. Marco, there is a man in Wales who offers these schematics for sale [1] and also repairs 9087 signal genera

Re: [time-nuts] question for expert time guys

Think OP has the Choice of 3 bands Sent from my iPhone On Feb 5, 2013, at 12:32 PM, Chris Albertson wrote: > On Mon, Feb 4, 2013 at 9:17 PM, Hal Murray wrote: > >> Can you re-transmit on a nearby frequency without blasting the receiver off >> the air? > > No not if it is in the same band, fi

Re: [time-nuts] Ultra Low Phase Noise 5 to 10 MHz Frequency Doubler

From: Adrian Hello, I'm forwarding the message below on behalf of Luciano, because there appears to be a problem with the time-nusts list that does no longer transmit any of his messages. Adrian + Hi all, A new paper, an Ultra Low Phase Noise 5 to 10 MHz Frequency Doubler

Re: [time-nuts] Locked onto LORAN 8970 GRI Monday AM

Hello Bill, I have no real idea. I can not DF at this time. Antenna is an omni. I suspect the FS700 receiver looks at GRI data and placement within the waveform and goes to a look up table in firmware to tell me the supposed location to the LORAN plan 10 years ago. Only thing that may be pos

[time-nuts] Ultra Low Phase Noise 5 to 10 MHz Frequency Doubler

Hello, I'm forwarding the message below on behalf of Luciano, because there appears to be a problem with the time-nusts list that does no longer transmit any of his messages. Adrian + Hi all, A new paper, an Ultra Low Phase Noise 5 to 10 MHz Frequency Doubler , is publ

Re: [time-nuts] Locked onto LORAN 8970 GRI Monday AM

Hi: Here's a table of US stations back when they were operational with links to Google images of the sites. http://www.prc68.com/I/Loran-c.shtml Have Fun, Brooke Clarke http://www.PRC68.com http://www.end2partygovernment.com/2012Issues.html ___ tim

Re: [time-nuts] Locked onto LORAN 8970 GRI Monday AM

Old rate numbers for Wildwood on web site were 9930 9960 and 8090. That info is probably past history. Bill Riches -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of paul swed Sent: Tuesday, February 05, 2013 1:16 PM To: Discussion of pre

Re: [time-nuts] Locked onto LORAN 8970 GRI Monday AM

At first I assumed it was Wildwood because of the strong signal but the loop nulled out to the north, not to the east where Wildwood is. After lunch I will take the portable rx over to the antenna site and see if it is in fact the tx. -Original Message- From: time-nuts-boun...@febo.com [m

Re: [time-nuts] Locked onto LORAN 8970 GRI Monday AM

There seems to be someone thinking that all LORAN-C stations are shut down, and this is not correct. I know first hand from the Eidi and Bø chain, that both are drifted by their host nations, as this responcibility was transfered to them from the USCG in 1995. I beleve most on foregin soil are drif

Re: [time-nuts] Locked onto LORAN 8970 GRI Monday AM

That is an interesting thought. Why a Master and X. Curious. They have been doing that since this all started. On Tue, Feb 5, 2013 at 1:16 PM, paul swed wrote: > There isn't a way to tell what station it is. Its just the gri rate with a > delay to the x station. > But I assume its the same actua

Re: [time-nuts] Locked onto LORAN 8970 GRI Monday AM

There isn't a way to tell what station it is. Its just the gri rate with a delay to the x station. But I assume its the same actual modulator and site. My 2 cents. Regards Paul. On Tue, Feb 5, 2013 at 1:06 PM, Bill Riches wrote: > OK Stan, > > What stations are you receiving - not GRI numbers bu

Re: [time-nuts] Locked onto LORAN 8970 GRI Monday AM

Stan in agreement with your figures using a HP3801 as the gps ref. As to the location I don't really have any way to tell the direction. I really have to believe its still the test facility down in NJ. But I have no clue. Regards Paul. On Tue, Feb 5, 2013 at 12:51 PM, Stan, W1LE wrote: > at 17:4

Re: [time-nuts] Locked onto LORAN 8970 GRI Monday AM

OK Stan, What stations are you receiving - not GRI numbers but locations! Bill Riches Cape May -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Stan, W1LE Sent: Tuesday, February 05, 2013 12:52 PM To: Discussion of precise time and freq

Re: [time-nuts] Locked onto LORAN 8970 GRI Monday AM

at 17:45Z, after 27 hours of continuous lock: freq offset is now -2.1E-12 and has been as low as -7E-13, compared to T'Bolt 10 MHz. Master station is at 59 dB, slave is at 63 dB signal strength. Stan,W1LE Cape Cod On 2/5/2013 12:12 PM, Bill Riches wrote: Hi Paul, I thought I was receiving

Re: [time-nuts] Smart fiber-optic cable ( a reference to Hp's smartclock )

On 02/05/2013 12:22 AM, Stanley wrote: My thinking is the temperature has the largest effect on change in delay of the cable and more data points would better to predict this change. The round trip change in delay would collate with a average of the temperature along the cable but not necessary a

Re: [time-nuts] question for expert time guys

On Mon, Feb 4, 2013 at 9:17 PM, Hal Murray wrote: > > Can you re-transmit on a nearby frequency without blasting the receiver off > the air? No not if it is in the same band, filters are never that good. I thought the OP had several bands available. So if this all needs to happen at one RF fre

Re: [time-nuts] Locked onto LORAN 8970 GRI Monday AM

Hi Paul, I thought I was receiving Wildwood which is 3 miles or so away but apparently not. I nulled out the sig with my LFL1010 loop and get a null about 30 degrees which is toward Boston but maybe it could be Seneca after figuring antenna error and Mag variation. Signal strength with the loop

Re: [time-nuts] VCXO in a watch timing machine

Have you actually tried to 'beat' a watch. Most of these devices use a audio pickup and sense the mechanical impulse from the drive system. They then indicate whether the watch is fast or slow I have one which uses the sound card to do the dsp and the secret sauce is the pickup and amplifier

Re: [time-nuts] VCXO in a watch timing machine

Hi Bill I've just checked - the oscillator does indeed go to the XTAL pins of the Philips microcontroller. The crystal I thought was for the mc turns out to be for the LCD display controller. I'll have a rummage for some resistors. Thanks John On Tue, 05 Feb 2013 05:20:48 -0800, WB6BNQ wro

Re: [time-nuts] Locked onto LORAN 8970 GRI Monday AM

http://www.insidegnss.com/node/3361 Paul, I'm not so sure about a big power bill. The average power of a LORAN transmitter is not high. -John === > Chuck > Their interest is indeed a time service as an alternate to GPS. There is > no > intent to re-activate much of the actual chains it

Re: [time-nuts] Locked onto LORAN 8970 GRI Monday AM

Hi Paul, I guess my point is, what is the point in firing up the transmitter for hours at a time, using the old coding, if they aren't planning on using the old coding? They could be doing propagation tests, but all of that was worked out 40 years ago and is available in white papers galore. So

Re: [time-nuts] Locked onto LORAN 8970 GRI Monday AM

Chuck Their interest is indeed a time service as an alternate to GPS. There is no intent to re-activate much of the actual chains its not for the old location service at all. UrsaNav has published several ppts that show what there interests seem to be. I think the key business is selling new rcvrs

[time-nuts] Racal 9420 OCXO schematic?

The subject says it all: anyone has the schematic of the Racal 9420 OCXO? A friend has one that stopped oscillating, and want to give it a try. 73 - Marco IK1ODO ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.co

Re: [time-nuts] Locked onto LORAN 8970 GRI Monday AM

Has anyone thought to ask them what their intentions are? It would seem to me that if they are interested in re-activating enough of the old LORAN-C network to provide time service that they might want to talk to folks that used to rely on LORAN-C for time service... -Chuck Harris Stan, W1LE wr

Re: [time-nuts] time-nuts Digest, Vol 103, Issue 14

Hi I'm still not really clear weather the original post was about fiber running around the cell site, or fiber running from the central office to the cell site. Since running GPS over fiber was mentioned I've assumed it's fiber at the cell site. Bob -Original Message- From: time-nuts-bou

Re: [time-nuts] time-nuts Digest, Vol 103, Issue 14

Juts an FYI. I thought fiber was lightning proof also. As it turns out the fiber used by phone companies has copper tracers in it for location purposes (Without metal it's hard to find where it's buried). This in turn causes lightning strikes to cut fiber fairly often. I wouldn't have though

Re: [time-nuts] VCXO in a watch timing machine

Hi John, OK ! It is good that the other resistors were there. It is also good that a lower EFC voltage lowers the frequency. I am not sure what standard values are available to you in the UK. I picked a standard value in the US that would roughly center the pot's range equally around 2.1 volt

Re: [time-nuts] VCXO in a watch timing machine

Hi I suspect the 18 MHz is simply the clock to a CPU chip. Cheap CPU + code is more cost effective than a bunch of random logic. If the gizmo works that, there's a "microphone" picking up the ticking and the CPU does DSP to figure out what's going on. Bob On Feb 5, 2013, at 6:18 AM, john wr

Re: [time-nuts] VCXO in a watch timing machine

Hi Some very good questions - thanks for the responses. No schematic (or documentation of any description - Ebay purchase), but I've done some dismantling and had a poke around with a multimeter. This is what I find: The power supply provides +5.2V and +/-6V. Strangely, the silkscreen on th

Re: [time-nuts] Smart fiber-optic cable ( a reference to Hp's smart clock )

g...@partiallystapled.com said: > Take a look at CERN's White Rabbit project. They're doing sub-nanosecond > time transfer over fiber, including compensating for temperature variations. The other group doing that sort of work that I know about is the radio astronomers in Chile. I don't have a g

Re: [time-nuts] VCXO in a watch timing machine

Ed, Interesting point, I hadn't considered that the frequency should be off ! {32768 x 550 = 18,022,400.000} So, maybe it has drifted the other way ? However, looking at the Witschi web site suggest that their instruments sense by picking up audio or vibration via some kind of sensor as they t