[time-nuts] how to open a Trimble mushroom ?

Pete Lancashire pete at petelancashire.com
Sat Dec 25 10:37:45 EST 2010


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 <robert8rpi at 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 <pete at petelancashire.com> wrote:
>
>
> From: Pete Lancashire <pete at petelancashire.com>
> Subject: [time-nuts] how to open a Trimble mushroom ?
> To: "Discussion of precise time and frequency measurement" <time-nuts at 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.
>
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