[time-nuts] Tbolt with Palisade?
robert8rpi at yahoo.co.uk
Mon Jan 19 07:46:39 UTC 2009
Keep the Palisade as it is. It's got a useful 1 PPS output. Also it's almost impossible to open the case without destroying it. The two halves are epoxyed together with a very good joint geometry! There is no obvious way to get to the antenna output. If you want to hack something, have a look for one of the Vaisalla GPS radiosondes. They have a nice Bi-Helix antenna, LNA and filter. But even a simple patch on a ground plane will do.
--- On Sun, 18/1/09, Grant Hodgson <grant at ghengineering.co.uk> wrote:
> From: Grant Hodgson <grant at ghengineering.co.uk>
> Subject: [time-nuts] Tbolt with Palisade?
> To: time-nuts at febo.com
> Date: Sunday, 18 January, 2009, 8:32 PM
> Does anybody know how difficult it would be to use just the
> antenna +
> LNA part of a Trimble Palisade? Have Tbolt but no antenna.
> I can get a
> Palisade for much less than a proper GPS antenna. Coax
> length would be
> about 20 feet, connected to the output of the
> Palisade's LNA (or output
> filter if fitted).
> Only possible problem I envisage is that the Palisade LNA
> will probably
> have less gain than say a 58532A. However, the latter is
> designed for
> long cable runs; I'm guessing that this unusual
> arrangement might work
> with a fairly short cable run. Powering the Palisade LNA
> shouldn't be
> too difficult me thinks.
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