19 Nov
2014
19 Nov
'14
11:44 p.m.
My general rule, is if cannot hold your finger on for a count of five, you
need fan directly on it (or sink, Robertson said), & experience has told
me, that one-two years life!!
John Kaur. in AZ where its hot>
On Wed, Nov 19, 2014 at 10:39 PM, John Robertson <pinball at telus.net> wrote:
On 11/19/2014, 5:47 PM, Josh Dersch wrote:
Hey all --
A quick one -- what's the normal operating temperature for the old MPS6540
ROMs used in the original Commodore PETs? I noticed last night after
running mine for ~30 minutes that the ROMs were very hot, to the point of
being painful to touch.
The machine is running fine as far as I can tell -- though I haven't
verified the contents of the ROMs, BASIC runs without any apparent issues.
Voltages are normal (just a shade under 5V).
I've not experienced ROM chips that run so very hot -- is this normal?
Thanks,
Josh
A fan is a good idea on older electronics. the cooler they run the
longer they
last. A heat sink epoxied to the top of hot ceramic devices is
not bad either...
John :-#)#
--
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