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

Pete Lancashire pete at petelancashire.com
Sat Dec 25 21:29:29 UTC 2010


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