Hello out there.
I am trying to remedy some TV birdie-like (or touchlight-like type RFI) that
is coming from special ultraviolet lighting used to stimulate plant growth in
a large aquarium. Apparently a combination of ultraviolet and white light
makes algae grow on the rocks and helps the plants survive - and these lights
must be on for about 6 hours daily.
The offending signals sound somewhat like TV birdies and are quite unstable -
with the most offensive RFI occuring around +/- 3.8Mhz and on +/- 1.830Mhz.
These signals drift back and forth - sometimes slowly but more often quite
erratically. One moment they will be on 3803 and then they will be present as
low as 3795.
The specific system I am dealing with has ACTINIC WHITE - VHO-1 and SUPER
ACTINIC R - VHO - 1 (ultraviolet light) bulbs in it - 2 each/ 4 total and has
twin power supplies of sorts supplying the voltage to the lamps.
The bulbs (which look like very long fluorescent tubes) are made by
Ultraviolet Resources International - and are quite expensive - around $100
Powering off the units kills the birdies COLD - and they definitely reappear
as soon as the unit is turned on again.
As this one is totally new to me, I am unsure how to proceed. Has anyone
ever seen this one before? What type of fix will work and where should it be
(Yes, I know three sticks of DYNOMITE in the right place will solve my
problem - but this guy is a friend and I am trying to find a solution that
both of us.)
Any ideas out there?
Sure would appreciate some help with this one.
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