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

[Stan, W1LE]

  The blue Scotch Brite pads also have friable material in them, avoid.

Consider visiting your local HVAC (heating, ventilation, and air 
conditioning) shop
Sheet filter material is commonly available from them,
and it does not deteriorate like the foam stuff.
Review all grades and thicknesses they offer.

Cut to size for your application

Stan,W1LE     Cape Cod     FN41sr



On 9/15/2010 7:47 AM, Chuck Harris wrote:
> 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
>
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