I've been in touch with Alfaspid in Canada and MFJ where I bought it. It's
coming off the tower tomorrow and headed back for warranty service as the
noise is well beyond expectations.
Thanks all for your input
jim ab3cv
On Thu, May 9, 2013 at 3:57 PM, Jerry Gardner <jerryw6uv@gmail.com> wrote:
> I have an Alfaspid RAK on my tower turning a TH-7DX. I cannot hear the
> rotator at all on the ground (the rotator is at about the 55' level on my
> tower). When I tested the rotator on the ground, I noticed that it did make
> a grinding sound, but it wasn't very loud. Certainly much quieter than a
> T2X or HAM-V.
>
> Have you spoken with the Alfa Radio guys in Edmonton about this?
>
>
> On Wed, May 8, 2013 at 7:11 PM, Jim Miller <jim@jtmiller.com> wrote:
>
> > My Alfaspid works fine but does make quite a grinding racket. Mine is
> only
> > up about 35ft as I have a rather short crankup. If it was at 100ft no one
> > would notice of course.
> >
> > From the sound it makes it sounds like just the noise from the wiper
> motor
> > whirring away but it does produce quite a growl. Since it appears to be
> > just a repurposed windshield wiper motor I'm a bit surprised at the noise
> > level produced.
> >
> > I've had the rotor apart just a bit to peek in the top and nothing seems
> > amiss. The top doesn't seem to do anything other than support the split
> > rubber grommet and keep crud and water out. As far as I can tell it
> doesn't
> > provide mechanical support on any axis.
> >
> > I was thinking of cranking the tower down and removing the grommet and
> > lifting the cap so that I could watch/listen while it rotates to try to
> > determine the real source of the noise.
> >
> > I was also thinking that if it is just "normal" I could try constructing
> a
> > cylindrical muffler that I could wrap around the rotor made of a hard
> > surface lined with foam to try to reduce the noise a bit.
> >
> > Neighbor who goes to bed early is complaining a bit...
> >
> > Suggestions anyone?
> >
> > Thanks
> >
> > Jim ab3cv
> > _______________________________________________
> >
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