House wiring & chorus

[Dave Krooshof]

choir:

>my old MXR Stereo Chorus.  Unfortunately he didn't dare touch it saying it was
>"digital" and that I should send it to MXR.
Whohahaha. You won't belive how analogue digital is in these machines.
The only difference seems to be that what you measure must me either min or
max volts. And some logic ports might need a checkup.
>The problem was that the signal would cut out and make lots of noise.....
>now it just makes lots of noise.  I can sort of hear the effect in the
>background
>lending me to believe that it might just be an ic or something.
Oh, damn. So it *is* the logic.
Hmm.
If the IC's are programmable ones: bad luck, you do need to get it fixed by
the pro's.
If the IC contains simple logic ports: Fine. Replace the IC.
To find out weather its one or the other:
Type in the type# in hotbot or altavista. This generally leads you to IC
descriptions right away.
To be suree it's not the amp, you could check with a scope if there is
correct chorussed signal living in the box.


housing:

As for the synth and other electronics:
Your circuit should contain a leveler for the power.
This means that  should the powersupply give out more volts then you need,
it should get rid of it by itself. Various tricks are around to organize
this. Form simple Zener diodes to complex circuitry with emitterfollowing
transistors.

Lightbulps however, do not have any of this, which is generally not a problem.
Here's a checklist:
1. One way or another, the current in your house is to high. Check this
with your multimeter set to (500 or so) Volts. Contact your electricity
dealer if it is more then 5% over what you expected.
2. By some cause or another, the power in your house is not stable.
Equipment with heavy motors to produce currents as well as consuming power.
Check the volts and see if your fridge, washing machine, tv, pc, or other
equipment is frustrating it.
If this is the case, buy a netfilter for your audio and computer!
3. Check weather your lamps are in a situation where the move. So, lamps
hanging to a wooden ceiling=floor, tend to die pretty soon. Expect a lamp
to die soon, when it's hanging from a ceiling/floor just underneath the
washing machine...
4. From your mail, I can tell your lamps die as often as you switch on your
synth.
How wise to contact us! Fetch a circuit for a HPF, as you're probably
producing to much subsonics...
5. Energy saving lights tend to live much longer then lightbulps. The knife
cuts at both edges.
6. Lamps genearlly only die in two situations: When switched (when cold,
their resistance is very low), and when hit/moved while on (hot and weak).
So if they die while nothing in particular seems to be happening, jump to
your window and have your camera ready, as in these cases it's UFO activity
for sure.



Dave

(you can handle a little humour between the info, can't you?)

--------------------------------------------
Dave Krooshof http://www.xs4all.nl/~krooshof
geluidstechnicus @ http://www.ahk.nl/the/theatertechniek_ov.html
webmaster: http://www.popronde.nl