Chuck:
The E05 64 drawing is THE ACTUAL SIZE of the PCB,
140x180mm.
The 0.5mm note just informs the constructor that the
nearest structural elements are 0.5mm from the PCB.
There are NO threads on the PCB, the thru clearance holes
are as shown 11 each diameter 3.25mm through holes for clearance to the 4-40
mounting screws.
The missing radius (a reason for the review drawing J ) is “2xR3.2mm”
The dimensional difference in the “mounting rail”
is just the way things turned out. (I could say that I want good thermal
conductance values between the PCB and the Baseplate.) I do note that in
certain thermal situations, I reserve the right to add more screws along the
edges to insure good thermal conduction to the Baseplate. The 54mm spacing here
is pretty wide when we discuss good contact conductance between the PCB and the
Baseplate.
-----Original Message-----
From: Chuck Green [mailto:greencl@mindspring.com]
Sent: Friday, 19 October, 2007 16.16
To: Dick Jansson-rr
Cc: Bob Davis; AMSAT Eagle
Subject: Re: [eagle] Review
Hi Dick,
Thank you for the dimensioned drawing. I can design a PCB
from this. A few questions...
What is the inside radius of the clear space at the rear?
What is the thread of the mounting holes? Do you intent
to use inserts?
The actual PCB size is 139 x 179 mm. No?
Why is the mounting rail a different size at the back
than on the sides? I don't really care what it is, just curious.
Chuck
Dick Jansson-rr wrote:
>
> Bob:
>
> Attached is drawing E05 64, 140x180 PCB. This is
being sent out for
> your review, prior to being posted on Eaglepedia.
This PCB gives more
> working area with fewer interruptions to the working
area (just
> essentially two posts). Please look at this and
forward any corrective
> comments.
>
> ’73,
>
> Dick Jansson, KD1K
>
> kd1k@amsat.org <mailto:kd1k@amsat.org>
>
> kd1k@arrl.net <mailto:kd1k@arrl.net>
>
>
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