[time-nuts] HP-5370B Running Hot...

[Chuck Harris]

The black/green Scotchbrite pads contain an abrasive which
might be friable.  I am not sure about the white, but they
probably contain something as well.  Just something I worry
about when using non filter materials as filters.

I find that the easiest source of the exact material is in
the passive "electrostatic" air filters sold at Home Depot,
etc.  They cost about $20 for the large adjustable size, and
you get enough of the material to do many scopes and instruments.

You really have to be careful not to get a filter material
that resists the air flow too greatly.

-Chuck Harris

Charles P. Steinmetz wrote:
> Paul wrote:
>
>> Speaking of filters.
>> * * *
>> many if not all of the filter material is degenerated.
>> Its soft and sticky. At a min get rid of it.
>> My environments clean so I leave them out.
>> Have never found a replacement. Maybe some home depot air filter.
>
> The HP 5345A manual specifically directs one to remove the filters.
>
> The coarser grades of "ScotchBrite" pads make good air filters, if one
> determines there is a need and is willing to check them once in a while.
> The coarser ones I have are decades old and white. Some grades are
> available at grocery stores as pot-and-pan scrubbers.
>
> Best regards,
>
> Charles