Chuck:
Indeed the machined baseplate width is just 141mm and the
cavity is 126mm wide. I would NOT recommend any PCB to be that full width, that
it be no wider than 140mm, so theoretically you could have a PCB that is
140x180mm. Perhaps that can be another iteration. (I did not deal with the PCB
at all in this round.) Not tonight honey, I've slugged at this beast for six
hours today, enough already!
Dick Jansson, KD1K
-----Original Message-----
From: Chuck Green [mailto:greencl@mindspring.com]
Sent: Wednesday, 17 October, 2007 21.46
To: Dick Jansson-rr
Cc: Bob Davis; AMSAT Eagle
Subject: Re: [eagle] Updated Module
Hi Dick,
This is a good step forward.
I had in mind making the PCB wider so that it extends
over the entire
length of the base plate on each side. It seems to me that you could
then make the PCB mounting points less intrusive into the
cavity below
the PCB. It
looks like I still have that option even if you don't
change the mounting points (true?). And I think that would also better
support the PCB and allow for more thermal contact
between the PCB and
the base.
I see that you have more mounting points per linear
distance for the
cover than for the PCB. Is this based on vibration modeling?
>
> Also note that the depth of the cavity below the
posts is 6.35mm, save
> for in the very center where there is an attachment
for the connector
> plate that is located 0.75mm below the PCB for a
space in the center
> that is 10mm wide by 6mm deep from the connector
plate. I was loathe
> to locate such a piece here but felt the need for a
third attachment
> for the connector plate.
>
Please reconsider this. It will cause considerable restriction
on where
connectors can be located that are also soldered to the
PCB. Connector
space/flexibility is a *major* issue.
Chuck