Another factor to consider is that ps stability requires using coax
connectors that are mechanically stable to within a few microns ie no BNCs.
Bruce
Don Latham wrote:
I agree about the ebay finds. Bad to design the boards form factor around
old chassis.
Maybe the thing is to find out from the electronic design how big the
board(s) will have to be or what the electronic footprint is, then go from
there? If the boards are designed so that idiosyncratic mounting is
possible, we can all mount them according to our own taste?
Don
Chris Albertson
You can't plan a project like this around eBay junk. How would you
assemble
100 kits if each kit requires that you find a specific HP instrument on
eBay?
If cost is a big issue then I'll go back to my first idea. Make your PCB
about
the size os a disk drive. Then yu get a llength od 1 x 1/4 inch aluminum
L
and bend it into a three sided "U" and attach it to three sides of the
PCB.
The finished assembly should fit into any enclusre designed to hold SATA
disk drives. A PC case could work but there are nicer looking boxes, rack
mount and diesktop
This trades a bit of metal working for the cost of a Hammond box. But
the metal work requires only a hack say and drill.
On Tue, Dec 21, 2010 at 8:35 AM, Bob Bownes<bow...@gmail.com> wrote:
I do the same with Tek 500/500series instrumentation plugins. You can
get
the TM504 mainframe for< $50 on ebay and scrap grade modules for< $10.
Plus you get a linear power supply, backplane and already RF rated
enclosure.
On Tue, Dec 21, 2010 at 11:12 AM,<ewkeh...@aol.com> wrote:
Hi
One source of boxes to consider is old HP equipment, some is very
reasonably priced, like 37203 for small boxes and a 59401A makes an
ideal
housing
for a Rb with clock GPS and backup power. Some times you can even use
part
of the guts. I even went as far as repackaging my 5062C into a HP case
of
that generation, heresy in the eyes of some of you
Bert Kehren Miami
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=====
Chris Albertson
Redondo Beach, California
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