Re: [time-nuts] Has my TBolt gone south ?
A nearby thunderstorm could have taken out the preamp in the antenna. 73 Bill Beam NL7F Carefully powering the antenna from a separate supply and then measuring the current - is one way of checking that the LNA still works. -- Björn ___ 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 instructions there.
Re: [time-nuts] Has my TBolt gone south ?
bpl...@outlook.com said: p.s. I believe you need a minimum of three satellites to work through the standard or precision survey. The Z3801A manual says it needs 4. I suspect there is an additional requirement that the satellites have a good-enough position in the sky. (as compared to all being in a line, or all being close together) -- These are my opinions. I hate spam. ___ 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 instructions there.
Re: [time-nuts] Has my TBolt gone south ?
Hi Looks like no antenna ( = no RF in the front end). If it’s been on for a while, I’d start with the antenna and work back to the TBolt. Bob On Aug 12, 2015, at 8:47 AM, Alberto di Bene dib...@usa.net wrote: Today I switched on again my TBolt after a few weeks of power down. It looks like it has decided to take a period of rest, maybe definitive... The link below is a screen capture of LH, with some annotation from me. Is there anything that, in your experience, I can try to diagnose the failure and possibly to repair it ? Thanks in advance. https://dl.dropboxusercontent.com/u/15089947/TB_bad.gif 73 Alberto I2PHD ___ 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 instructions there. ___ 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 instructions there.
Re: [time-nuts] Has my TBolt gone south ?
On 8/12/2015 8:29 PM, Hal Murray wrote: How long did you wait after turning it on? How good is your antenna position? Did you tell it to remember the location after a survey finished? If it's been off for a few weeks, it doesn't know where the satellites are. To get started, it has to find one by a brute force search. With a good antenna, that doesn't take very long. Then it takes 15 minutes to collect the satellite info. With a poor antenna location, it takes longer, maybe a lot longer. Thanks Hal for your answer. My TB now is switched on since yesterday, but no satellites are acquired... Last time I switched it on, it worked, and, even after a long off period, it did take not more than a few minutes to acquire the first satellite. Yesterday, after I saw that no satellites did show up in LH, I issued the ! command to do a cold reset, just to see if it could be of help. My antenna is a timing antenna, on the chimney of my house, completely free from obstacles. There is the possibilities that a thunderstorm has broken its small mast, tomorrow I will check. This seems to be the only reasonable cause of the malfunction... the TB accepts commands and sends back status info. Unless its GPS receiver has developed a fault... 73 Alberto I2PHD ___ 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 instructions there.
Re: [time-nuts] Has my TBolt gone south ?
A nearby thunderstorm could have taken out the preamp in the antenna. 73 Bill Beam NL7F - Original Message - From: Discussion of precise time and frequency measurement To: Cc: Sent:Wed, 12 Aug 2015 23:29:45 +0200 Subject:Re: [time-nuts] Has my TBolt gone south ? On 8/12/2015 8:29 PM, Hal Murray wrote: How long did you wait after turning it on? How good is your antenna position? Did you tell it to remember the location after a survey finished? If it's been off for a few weeks, it doesn't know where the satellites are. To get started, it has to find one by a brute force search. With a good antenna, that doesn't take very long. Then it takes 15 minutes to collect the satellite info. With a poor antenna location, it takes longer, maybe a lot longer. Thanks Hal for your answer. My TB now is switched on since yesterday, but no satellites are acquired... Last time I switched it on, it worked, and, even after a long off period, it did take not more than a few minutes to acquire the first satellite. Yesterday, after I saw that no satellites did show up in LH, I issued the ! command to do a cold reset, just to see if it could be of help. My antenna is a timing antenna, on the chimney of my house, completely free from obstacles. There is the possibilities that a thunderstorm has broken its small mast, tomorrow I will check. This seems to be the only reasonable cause of the malfunction... the TB accepts commands and sends back status info. Unless its GPS receiver has developed a fault.. 73 Alberto I2PHD ___ 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 instructions there. ___ 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 instructions there.
Re: [time-nuts] Has my TBolt gone south ?
Hi Never ever rule out the idea that a squirrel has found your feed line a really tasty thing to chew on…. Bob On Aug 12, 2015, at 5:29 PM, Alberto di Bene dib...@usa.net wrote: On 8/12/2015 8:29 PM, Hal Murray wrote: How long did you wait after turning it on? How good is your antenna position? Did you tell it to remember the location after a survey finished? If it's been off for a few weeks, it doesn't know where the satellites are. To get started, it has to find one by a brute force search. With a good antenna, that doesn't take very long. Then it takes 15 minutes to collect the satellite info. With a poor antenna location, it takes longer, maybe a lot longer. Thanks Hal for your answer. My TB now is switched on since yesterday, but no satellites are acquired... Last time I switched it on, it worked, and, even after a long off period, it did take not more than a few minutes to acquire the first satellite. Yesterday, after I saw that no satellites did show up in LH, I issued the ! command to do a cold reset, just to see if it could be of help. My antenna is a timing antenna, on the chimney of my house, completely free from obstacles. There is the possibilities that a thunderstorm has broken its small mast, tomorrow I will check. This seems to be the only reasonable cause of the malfunction... the TB accepts commands and sends back status info. Unless its GPS receiver has developed a fault... 73 Alberto I2PHD ___ 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 instructions there. ___ 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 instructions there.
Re: [time-nuts] Has my TBolt gone south ?
I have had a similar issue occur. For some reason it all of a sudden wanted to do wanted to do a self survey but couldn't. Stuck at 1% on the survey. I switched to Tboltmonitor as my backup program and was able to re input my lat/long and altitude settings, saved and it carried on. Power glitch, firmware issue, who knows. p.s. I believe you need a minimum of three satellites to work through the standard or precision survey. -=Bryan=- To: time-nuts@febo.com From: hmur...@megapathdsl.net Date: Wed, 12 Aug 2015 11:29:58 -0700 CC: hmur...@megapathdsl.net Subject: Re: [time-nuts] Has my TBolt gone south ? dib...@usa.net said: Today I switched on again my TBolt after a few weeks of power down. It looks like it has decided to take a period of rest, maybe definitive... How long did you wait after turning it on? How good is your antenna position? Did you tell it to remember the location after a survey finished? If it's been off for a few weeks, it doesn't know where the satellites are. To get started, it has to find one by a brute force search. With a good antenna, that doesn't take very long. Then it takes 15 minutes to collect the satellite info. With a poor antenna location, it takes longer, maybe a lot longer. -- These are my opinions. I hate spam. ___ 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 instructions there. ___ 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 instructions there.
Re: [time-nuts] Has my TBolt gone south ?
I had an issue with mine and worked it out last night thanks to all of you great list members!! Thank you!! Turned out to be a blown PNP SOT package transistor that feeds 5V to the antenna. Do you have 5V on the F connector? I saw your Lady Heather screenshot said antenna ok, but this is just a thought. Mine was hanging at 1% self survey for days and after replacing the transistor and doing a factory reset it picked up all satellites and settled down to 0.04 ppb error. I'll post details of the transistors (there are 5) in the vicinity of U19. Thanks to Matthias Jelen for the help. On some models the transistors are on the other side of the board. The blown one on mine was marked C2N which is a Central Semiconductor CMPT404A and is carried by Mouser. It's listed as a PNP chopper transistor. I used an On Semiconductor MMBT3906 that I had in stock and it worked fine. The other four transistors are marked 5D, 1AM, 2A, and 2A. Good luck and I hope you are able to fix your unit. Chris KD4PBJ — Sent from Mailbox On Wed, Aug 12, 2015 at 9:02 PM, Bryan _ bpl...@outlook.com wrote: I have had a similar issue occur. For some reason it all of a sudden wanted to do wanted to do a self survey but couldn't. Stuck at 1% on the survey. I switched to Tboltmonitor as my backup program and was able to re input my lat/long and altitude settings, saved and it carried on. Power glitch, firmware issue, who knows. p.s. I believe you need a minimum of three satellites to work through the standard or precision survey. -=Bryan=- To: time-nuts@febo.com From: hmur...@megapathdsl.net Date: Wed, 12 Aug 2015 11:29:58 -0700 CC: hmur...@megapathdsl.net Subject: Re: [time-nuts] Has my TBolt gone south ? dib...@usa.net said: Today I switched on again my TBolt after a few weeks of power down. It looks like it has decided to take a period of rest, maybe definitive... How long did you wait after turning it on? How good is your antenna position? Did you tell it to remember the location after a survey finished? If it's been off for a few weeks, it doesn't know where the satellites are. To get started, it has to find one by a brute force search. With a good antenna, that doesn't take very long. Then it takes 15 minutes to collect the satellite info. With a poor antenna location, it takes longer, maybe a lot longer. -- These are my opinions. I hate spam. ___ 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 instructions there. ___ 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 instructions there. ___ 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 instructions there.
Re: [time-nuts] Has my TBolt gone south ?
Or if your in Australia, a cockatoo. I've had to rerun my coax twice over the past 12 months On Thu, Aug 13, 2015 at 9:18 AM, William Beam wb...@gci.net wrote: A nearby thunderstorm could have taken out the preamp in the antenna. 73 Bill Beam NL7F - Original Message - From: Discussion of precise time and frequency measurement To: Cc: Sent:Wed, 12 Aug 2015 23:29:45 +0200 Subject:Re: [time-nuts] Has my TBolt gone south ? On 8/12/2015 8:29 PM, Hal Murray wrote: How long did you wait after turning it on? How good is your antenna position? Did you tell it to remember the location after a survey finished? If it's been off for a few weeks, it doesn't know where the satellites are. To get started, it has to find one by a brute force search. With a good antenna, that doesn't take very long. Then it takes 15 minutes to collect the satellite info. With a poor antenna location, it takes longer, maybe a lot longer. Thanks Hal for your answer. My TB now is switched on since yesterday, but no satellites are acquired... Last time I switched it on, it worked, and, even after a long off period, it did take not more than a few minutes to acquire the first satellite. Yesterday, after I saw that no satellites did show up in LH, I issued the ! command to do a cold reset, just to see if it could be of help. My antenna is a timing antenna, on the chimney of my house, completely free from obstacles. There is the possibilities that a thunderstorm has broken its small mast, tomorrow I will check. This seems to be the only reasonable cause of the malfunction... the TB accepts commands and sends back status info. Unless its GPS receiver has developed a fault.. 73 Alberto I2PHD ___ 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 instructions there. ___ 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 instructions there. -- -- Teach your kids Science, or somebody else will :/ ja...@ball.net vk2...@google.com vk2f...@google.com callsign: vk2vjb ___ 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 instructions there.
[time-nuts] Has my TBolt gone south ?
Today I switched on again my TBolt after a few weeks of power down. It looks like it has decided to take a period of rest, maybe definitive... The link below is a screen capture of LH, with some annotation from me. Is there anything that, in your experience, I can try to diagnose the failure and possibly to repair it ? Thanks in advance. https://dl.dropboxusercontent.com/u/15089947/TB_bad.gif 73 Alberto I2PHD ___ 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 instructions there.
Re: [time-nuts] Has my TBolt gone south ?
dib...@usa.net said: Today I switched on again my TBolt after a few weeks of power down. It looks like it has decided to take a period of rest, maybe definitive... How long did you wait after turning it on? How good is your antenna position? Did you tell it to remember the location after a survey finished? If it's been off for a few weeks, it doesn't know where the satellites are. To get started, it has to find one by a brute force search. With a good antenna, that doesn't take very long. Then it takes 15 minutes to collect the satellite info. With a poor antenna location, it takes longer, maybe a lot longer. -- These are my opinions. I hate spam. ___ 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 instructions there.
