DEC RK05 HEPA Filters

[william degnan]

On Wed, Apr 13, 2016 at 10:12 AM, Rick Bensene <rickb at bensene.com> wrote:

> Bill Degnan wrote:
> >
> > I replaced my filters a little while ago, I was concerned about original
> filters'
> > deterioration, perhaps these will have decomposed over time even if not
> in
> > use. So I found a newly-produced filter, documented here:
> > http://vintagecomputer.net/browse_thread_record.cfm?id=588&tid=1
> >
> > But basically 3M Filtrete #0412560 carbon pre-filter cut to match the
> original,
> > from a tracing.
> >
> The filter Bill replaced is the external dust filter.  While good to
> replace, this isn't the internal HEPA filter that Michael wrote about
> replacing on his RK05 drives, and that he found available on eBay.
>
> The HEPA filter is inside the drive.  It is a filter designed to capture
> very tiny particles yet still be a minimal restriction to airflow.  To get
> to the HEPA filter, you have to take the bottom cover off of the drive.
>  The filter is quite large, and as mentioned, there are two different types
> depending on the age of the drive.   If they haven't been replaced in a
> long time, they should be replaced, as they eventually do clog up with
> particulates.  When this happens, it can restrict the airflow to the disk
> platter area, which can lead to dust particles ending up on the platter,
> and that can result in head crashes, which are most unpleasant.   Sadly,
> the manufacturer of the HEPA filter stopped making them a long time ago,
> and they can be hard to find.  I do believe some manufacturer was making
> reproductions of them for a time, but I believe that they are no longer
> doing so.  So, finding the filters today can be tricky.
>
> -Rick
>
>
Oooo...yes my misunderstanding of what you meant.  What he said.

-- 
@ BillDeg:
Web: vintagecomputer.net
Twitter: @billdeg <https://twitter.com/billdeg>
Youtube: @billdeg <https://www.youtube.com/user/billdeg>
Unauthorized Bio <http://www.vintagecomputer.net/readme.cfm>