Re: [time-nuts] how to open a Trimble mushroom ?
I've opened similar packages (Motorola PVT-6 antennas) up with compressed air. YOU NEED TO BE VERY CAREFUL IF YOU DO THIS The plastic can shatter and fire off a million splinters. Probably into you. I wrapped the object of my attention in heavy canvas rolled up to form a rough tube (to guide and baffle the pressure wave front) and wore a shop apron and face sheild. I used a rubber tip blow gun to (slowly!) pressurize the package and it popped. 120 psi across a 6 diameter package is a couple of tons of force. It should separate. ;-) On 12/24/2010 4:00 PM, Pete Lancashire wrote: More goodies from storage I have a few 'special' Trimble mushroom GPS's. I'm trying to open one up but can't seem to get very far. I've pulled all the tabs out but still can't pry the case open. They interface between the two sections doesn't look welded or glued. Here a couple picts http://petelancashire.com/gallery/main.php?g2_itemId=21208 The data on these guys was trashed long ago when the company closed up. I could not locate it anywhere. ___ 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. -- mailto:o...@ozindfw.net Oz POB 93167 Southlake, TX 76092 (Near DFW Airport) ___ 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] how to open a Trimble mushroom ?
On 26/12/10 06:47, Hal Murray wrote: Seem to recall they may be rs422. Trimble has/had at least 2 units like that: Palisade and Acutime. There have been several variations of the Acutime. So I can't just plug a Palisade into an Acutime rack? ___ 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] how to open a Trimble mushroom ?
Hi Pete, That is the same case as the Palisade. I've opened one before. It looks like it should unclip but does not. The two halves do clip together, but there is a gutter inside the circumference of the lower half that a molded edge of the top fits into. They fill the gutter with epoxy before clipping them together. I had to cut through the top to open it. It had a curved crossed dipole antenna and a GPS RX on a PCB. All highly inegrated. Have you tried powering it up using the Palisade / accutime connection info and montitoring the data pins? Happy Holidays, Robert G8RPI. --- On Fri, 24/12/10, Pete Lancashire p...@petelancashire.com wrote: From: Pete Lancashire p...@petelancashire.com Subject: [time-nuts] how to open a Trimble mushroom ? To: Discussion of precise time and frequency measurement time-nuts@febo.com Date: Friday, 24 December, 2010, 22:00 More goodies from storage I have a few 'special' Trimble mushroom GPS's. I'm trying to open one up but can't seem to get very far. I've pulled all the tabs out but still can't pry the case open. They interface between the two sections doesn't look welded or glued. Here a couple picts http://petelancashire.com/gallery/main.php?g2_itemId=21208 The data on these guys was trashed long ago when the company closed up. I could not locate it anywhere. ___ 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] how to open a Trimble mushroom ?
I knew I was not the first :-) ! I was willing to sacrifice this one since it was marked intermittent and I have a total of five. Three of the other four are still in sealed bags. As to powering up, I've not yet located any of the cables. I do have foggy memories of there being some at least 50' maybe 100'. Their GPS need was only 1 PPS, why the special I don't know. Thanks ! -pete On Sat, Dec 25, 2010 at 2:08 AM, Robert Atkinson robert8...@yahoo.co.uk wrote: Hi Pete, That is the same case as the Palisade. I've opened one before. It looks like it should unclip but does not. The two halves do clip together, but there is a gutter inside the circumference of the lower half that a molded edge of the top fits into. They fill the gutter with epoxy before clipping them together. I had to cut through the top to open it. It had a curved crossed dipole antenna and a GPS RX on a PCB. All highly inegrated. Have you tried powering it up using the Palisade / accutime connection info and montitoring the data pins? Happy Holidays, Robert G8RPI. --- On Fri, 24/12/10, Pete Lancashire p...@petelancashire.com wrote: From: Pete Lancashire p...@petelancashire.com Subject: [time-nuts] how to open a Trimble mushroom ? To: Discussion of precise time and frequency measurement time-nuts@febo.com Date: Friday, 24 December, 2010, 22:00 More goodies from storage I have a few 'special' Trimble mushroom GPS's. I'm trying to open one up but can't seem to get very far. I've pulled all the tabs out but still can't pry the case open. They interface between the two sections doesn't look welded or glued. Here a couple picts http://petelancashire.com/gallery/main.php?g2_itemId=21208 The data on these guys was trashed long ago when the company closed up. I could not locate it anywhere. ___ 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] how to open a Trimble mushroom ?
Seem to recall they may be rs422. On Sat, Dec 25, 2010 at 10:37 AM, Pete Lancashire p...@petelancashire.comwrote: I knew I was not the first :-) ! I was willing to sacrifice this one since it was marked intermittent and I have a total of five. Three of the other four are still in sealed bags. As to powering up, I've not yet located any of the cables. I do have foggy memories of there being some at least 50' maybe 100'. Their GPS need was only 1 PPS, why the special I don't know. Thanks ! -pete On Sat, Dec 25, 2010 at 2:08 AM, Robert Atkinson robert8...@yahoo.co.uk wrote: Hi Pete, That is the same case as the Palisade. I've opened one before. It looks like it should unclip but does not. The two halves do clip together, but there is a gutter inside the circumference of the lower half that a molded edge of the top fits into. They fill the gutter with epoxy before clipping them together. I had to cut through the top to open it. It had a curved crossed dipole antenna and a GPS RX on a PCB. All highly inegrated. Have you tried powering it up using the Palisade / accutime connection info and montitoring the data pins? Happy Holidays, Robert G8RPI. --- On Fri, 24/12/10, Pete Lancashire p...@petelancashire.com wrote: From: Pete Lancashire p...@petelancashire.com Subject: [time-nuts] how to open a Trimble mushroom ? To: Discussion of precise time and frequency measurement time-nuts@febo.com Date: Friday, 24 December, 2010, 22:00 More goodies from storage I have a few 'special' Trimble mushroom GPS's. I'm trying to open one up but can't seem to get very far. I've pulled all the tabs out but still can't pry the case open. They interface between the two sections doesn't look welded or glued. Here a couple picts http://petelancashire.com/gallery/main.php?g2_itemId=21208 The data on these guys was trashed long ago when the company closed up. I could not locate it anywhere. ___ 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. ___ 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] how to open a Trimble mushroom ?
Seem to recall they may be rs422. Trimble has/had at least 2 units like that: Palisade and Acutime. There have been several variations of the Acutime. Trimble had a development kit for the Palisade. It was a little box with RS-422 to RS-232 converters, a DB-25 on the back, 2 DE-9s and a BNC on the front. (and cables and such) ftp://ftp.trimble.com/pub/sct/embedded/bin/Manuals/Old%20Manuals/PALISADE.PD F There are 5 signals: PPS Tx-A, Rx-A Tx-B, Rx-B The B channel is reasonably normal. You can send and receive messages. The A channel is different. The Tx (to Palisade) signal is for timing, not data. The development kit wires it up to one of the modem control signals. When you flap that signal, it sends you back a message with the time that the signal flapped. If your RS-422/232 converter wired Tx-Tx, you can send a null byte. -- These are my opinions, not necessarily my employer's. 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] how to open a Trimble mushroom ?
yep i found enough searching around that once I find one of the cables, I can see what happens. Thanks !! -pete On Sat, Dec 25, 2010 at 1:13 PM, Robert Atkinson robert8...@yahoo.co.uk wrote: hi Pete, If you search the archive you should find a old email with the connector part number. They are normally RS422 out. Regards, Robert. --- On Sat, 25/12/10, Pete Lancashire p...@petelancashire.com wrote: From: Pete Lancashire p...@petelancashire.com Subject: Re: [time-nuts] how to open a Trimble mushroom ? To: Discussion of precise time and frequency measurement time-nuts@febo.com Date: Saturday, 25 December, 2010, 15:37 I knew I was not the first :-) ! I was willing to sacrifice this one since it was marked intermittent and I have a total of five. Three of the other four are still in sealed bags. As to powering up, I've not yet located any of the cables. I do have foggy memories of there being some at least 50' maybe 100'. Their GPS need was only 1 PPS, why the special I don't know. Thanks ! -pete On Sat, Dec 25, 2010 at 2:08 AM, Robert Atkinson robert8...@yahoo.co.uk wrote: Hi Pete, That is the same case as the Palisade. I've opened one before. It looks like it should unclip but does not. The two halves do clip together, but there is a gutter inside the circumference of the lower half that a molded edge of the top fits into. They fill the gutter with epoxy before clipping them together. I had to cut through the top to open it. It had a curved crossed dipole antenna and a GPS RX on a PCB. All highly inegrated. Have you tried powering it up using the Palisade / accutime connection info and montitoring the data pins? Happy Holidays, Robert G8RPI. --- On Fri, 24/12/10, Pete Lancashire p...@petelancashire.com wrote: From: Pete Lancashire p...@petelancashire.com Subject: [time-nuts] how to open a Trimble mushroom ? To: Discussion of precise time and frequency measurement time-nuts@febo.com Date: Friday, 24 December, 2010, 22:00 More goodies from storage I have a few 'special' Trimble mushroom GPS's. I'm trying to open one up but can't seem to get very far. I've pulled all the tabs out but still can't pry the case open. They interface between the two sections doesn't look welded or glued. Here a couple picts http://petelancashire.com/gallery/main.php?g2_itemId=21208 The data on these guys was trashed long ago when the company closed up. I could not locate it anywhere. ___ 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. ___ 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] how to open a Trimble mushroom ?
More goodies from storage I have a few 'special' Trimble mushroom GPS's. I'm trying to open one up but can't seem to get very far. I've pulled all the tabs out but still can't pry the case open. They interface between the two sections doesn't look welded or glued. Here a couple picts http://petelancashire.com/gallery/main.php?g2_itemId=21208 The data on these guys was trashed long ago when the company closed up. I could not locate it anywhere. ___ 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] how to open a Trimble mushroom ?
My Sainted Grandmother had a favorite saying ... ...Don't force it, get a bigger hammer... 73 es HH, Dick, W1KSZ -Original Message- From: Pete Lancashire p...@petelancashire.com Sent: Dec 24, 2010 3:00 PM To: Discussion of precise time and frequency measurement time-nuts@febo.com Subject: [time-nuts] how to open a Trimble mushroom ? More goodies from storage I have a few 'special' Trimble mushroom GPS's. I'm trying to open one up but can't seem to get very far. I've pulled all the tabs out but still can't pry the case open. They interface between the two sections doesn't look welded or glued. Here a couple picts http://petelancashire.com/gallery/main.php?g2_itemId=21208 The data on these guys was trashed long ago when the company closed up. I could not locate it anywhere. ___ 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.
