[aprssig] PCSAT-3 opportunity?
bruninga at usna.edu
Tue Jun 26 11:55:09 CDT 2007
Plenty of time for the flight board. A year maybe. Just need
to size the device. Must be smallest possible to improve
chances of a rid. Two options:
1) 145.825 RX/TX + TNC digipeater for APRS
2) 28.120 MHz RX for PSK-31 + TX FM on 145.825
No GPS (not enough power avail).
> -----Original Message-----
> From: aprssig-bounces at lists.tapr.org
> [mailto:aprssig-bounces at lists.tapr.org] On Behalf Of 'Scott
> Sent: Tuesday, June 26, 2007 12:41 PM
> To: 'Curt Mills, WE7U'; 'TAPR APRS Mailing List'
> Subject: RE: [aprssig] PCSAT-3 opportunity?
> If you're talking about the one that fit in the original
> OpenTracker case
> (with a hole in the board) then you're right, only a few of
> those were made,
> though I've got a big stack of unused boards. Trouble with
> those was that a
> routing error in the oscillator circuit made them really
> flaky. Those SMT
> crystals are hard to mount properly anyway, and with the
> board error only
> about 50% of the ones I built actually worked. The T2-135 is
> mostly the
> same circuit, but with a better layout, and has never had
> that problem.
> The T2-135 would probably be usable itself, but the
> connectors aren't really
> ideal. If there's no rush, I can spin a new board rev in a
> couple of weeks.
> I can get prototypes faster of course, but the cost climbs
> fast as lead
> times decrease.
> As I mentioned in the last email, I'm already working on a
> board that mates
> with a commercial radio board, so it'll have all of the
> signals needed on a
> 0.1" pin header. Might not be the right levels for another
> radio, though.
> Here's a picture of the radio in its housing, with RF board
> installed: http://n1vg.net/opentracker/images/dtx-plus.jpg
> > -----Original Message-----
> > From: aprssig-bounces at lists.tapr.org
> > [mailto:aprssig-bounces at lists.tapr.org] On Behalf Of Curt,
> > Sent: Tuesday, June 26, 2007 8:51 AM
> > To: TAPR APRS Mailing List
> > Subject: Re: [aprssig] PCSAT-3 opportunity?
> > On Tue, 26 Jun 2007, Jason Winningham wrote:
> > > Tracker2. digipeater, remotely controllable/configurable.
> > I have one such in my hands, but I don't think very many of
> > were made. Surface/mount Tracker2. Tiny tiny tiny. Maybe
> > has another one floating around, but I think there was a
> > problem with the clock circuit on this board or with one of
> > components on the S/M version.
> > I don't know if he's planning to create any more of these
> > The T2-135 board may also qualify and is S/M too I think,
> > probably somewhat bigger. I know he's produced several of
> > It'd definitely be worth asking Scott.
> > --
> > Curt, WE7U. APRS Client Comparisons:
> > "Lotto: A tax on people who are bad at math." -- unknown
> > "Windows: Microsoft's tax on computer illiterates." -- WE7U
> > "The world DOES revolve around me: I picked the coordinate
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