[Moon-net] Lidl level

[Edward R. Cole]

At 04:59 PM 1/16/2007 +0100, Oene Spanjer wrote:
>
>Hello Edward,
>
>For overcome the long cable problem try using the noise rejection tric on
>the page of PA3FPQ http://members.chello.nl/j.swienink1/elevation.html
>I myself had very unstable readout with a cable length of abt 30 meters,
>but after that it is doing perfect job!!
>Gl to you and hopefully we make a qso one day !!!
>
>73 Oene
>PA3CWN

Oene,

Thanks for the tip.  I had read of folks using the swinink level but only
reference was sources in Europe so when the Memsic unit was suggested I
took a chance and ordered two (one for 2m and other for 23cm eme antennas).

Getting inside the memsic unit is not easy as they are cemented inside a
plastic enclosure.  I found using a razor knife I could remove the back OK,
but still may make accessing the elevation sensor leads difficult.  Also I
have no idea on circuit lead identification.  I did measure the dc voltage
on the indicator so do not think there is significant drop there.  But
noise may be a factor.  I am using shielded cable anticipating noise
issues.  I did use a 10 uF electrolytic to stiffen the supply voltage, but
did not bypass with 0.1 uF caps.  Supply voltage is 9v but all operating
levels are at 5v.

I'm not at a point of giving up on these units.  I just was running out of
good wx to get my 2m-eme array back in service so decided not delay raising
it because of the elevation indicator.  I use actuator arms for elevation
so calibrated the digital postion indicator for a look-up list for now.
Having real-time elevation readout someday would be nice.
73's,
Ed - KL7UW  
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