Just make sure that the airflow around the OXCO isnt too great or the oven
temperature regulation will suffer.
Bruce
On Wednesday, 27 January 2016 8:02 PM, Perry Sandeen via time-nuts
<time-nuts@febo.com> wrote:
Hi,
Wrote: Since the front end chips are mixed signal ASIC’s, it will take more
than a bit of time to replace them directly. Re-doing the entire front panel
board is the most likely way to “fix”the problem.. The question is - why do
that at all? Just do a PC instrument that does the same thing as the counter
with way less effort…..
Well, I have two reasons not to.
First I have about $1800 invested in my 3 5370’s including the new CPU boards
and blowing that off is not in my budget. I’ll kludge the living daylights out
of my units before blowing off my investment.
Second, I haven’t the slightest clue on how to do a PC instrument and I have to
many other projects to finish to learn something new.
Also there was much discussion about A and B cooling in the past and it seems
the only things some did to their units was the addition of fan(s) on the
cooling fins. I had an external fan on a B I was running and the thing still
was too hot.
IMNSHO, I believe the front end chip failure is aggravated by the high interior
heat level. I’m committed to a number of other projects so it will be a while
before I can work on mine.
I’ll either rip the whole PS out and put it on another chassis, try better 3
terminal regulators instead of the installed pass transistors, install
switching regulator PS’s in place of the original PS, cut holes in the top lid
and install 10 or 12 computer fans. Or a combination of the afore mentioned.
I don’t give a rat’s behind how it will look. I’m only interested in it working
properly. I’ve spent 50 years in the electronics industry and I will find a
way to skin this cat. I’ve done this to other equipment before. And when done
I’ll tell the list how I did it.
Regards,
Perrier
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