Here's a new weird experience for me:
I've got VCO V0.2 about 98% completed. (Still needs 1V/octave
tuning). In wiring up all of the controls and jacks to the front
panel (wood, as all of mine are), for the first time ever in any of
100's of modules that I've built over the years, I have this module
acting as an ANTENNA! :O
The closer that I put my hand to either of the 2 tuning knobs or the
pitch CV Amount knob, the higher the pitch of the VCO becomes. ????
Has anyone else ever had this kind of trouble with any module?
The one new thing that I've done with this module, that I've never
done before - is wrap all of the wiring from the PCB, around other
wires to / from the PCB. I figured I could do that to keep all of the
wiring as neat as possible, instead of using cable ties, to hold them
all together. Could THIS be the cause for picking things up from my
own touch?
When I get ready to do the 1V/O (Mooging? ;) ) today, I thought I
would unwrap each of the 3 voltage feeds (Tune, Fine, CV) from the
wrapped wires to leave them free-hanging, to see if this stops things.
Another difference that I'm surprised by: this VCO is highly affected
by the voltage swings in 1 of my 2 LFOs. (My previous Tom Gamgle
VCO4D and Ian Fritz mini-VCO) aren't affected at all.
Both of them though - have 100uF bypass caps on the power inputs to
their boards. I'm going to try increasing the bypass cap values on
the VCO V0.2 board to 100uF as well as at least 1 x 100nF each. Also
- I'll check my 2 LFOs to see if they have proper bypass caps at their
quad opamps as well.
Thanks to any possible solutions to what I've typed, above. :)
--
Take care,
Warmth and Peace,
Ryk
http://www.sdiy.org/damian/index.html - my modular synth's homepage :)
I've got VCO V0.2 about 98% completed. (Still needs 1V/octave
tuning). In wiring up all of the controls and jacks to the front
panel (wood, as all of mine are), for the first time ever in any of
100's of modules that I've built over the years, I have this module
acting as an ANTENNA! :O
The closer that I put my hand to either of the 2 tuning knobs or the
pitch CV Amount knob, the higher the pitch of the VCO becomes. ????
Has anyone else ever had this kind of trouble with any module?
The one new thing that I've done with this module, that I've never
done before - is wrap all of the wiring from the PCB, around other
wires to / from the PCB. I figured I could do that to keep all of the
wiring as neat as possible, instead of using cable ties, to hold them
all together. Could THIS be the cause for picking things up from my
own touch?
When I get ready to do the 1V/O (Mooging? ;) ) today, I thought I
would unwrap each of the 3 voltage feeds (Tune, Fine, CV) from the
wrapped wires to leave them free-hanging, to see if this stops things.
Another difference that I'm surprised by: this VCO is highly affected
by the voltage swings in 1 of my 2 LFOs. (My previous Tom Gamgle
VCO4D and Ian Fritz mini-VCO) aren't affected at all.
Both of them though - have 100uF bypass caps on the power inputs to
their boards. I'm going to try increasing the bypass cap values on
the VCO V0.2 board to 100uF as well as at least 1 x 100nF each. Also
- I'll check my 2 LFOs to see if they have proper bypass caps at their
quad opamps as well.
Thanks to any possible solutions to what I've typed, above. :)
--
Take care,
Warmth and Peace,
Ryk
http://www.sdiy.org/damian/index.html - my modular synth's homepage :)