1973 VCF resonance
2015-12-05 by Julien Pauty
Hello,
On my 1973 VCF, the useful range on the resonance pot is quite limited. For the first 3/4 of the range the sound does not really change. Resonance appears only on the last 1/4 of the pot. Thread
1973 VCF resonance
Re: 1973 VCF resonance
2015-12-06 by Ken Stone
By the last quarter of the pot, the resonance should be getting pretty full-on. Did you use a log pot? Check for errors in your resistor values, etc. Most likely, there is an error somewhere there.
If all seems okay, try reducing the value of the 68k connected to the wiper of the Q pot may help.
If all seems okay, try reducing the value of the 68k connected to the wiper of the Q pot may help.
Show quoted textHide quoted text
On Sun, Dec 6, 2015 at 9:29 AM, Julien Pauty julien.pauty@... [cgs_synth] <cgs_synth@yahoogroups.com> wrote:JulienCheers,Is that the expected behavior ?Hello,On my 1973 VCF, the useful range on the resonance pot is quite limited. For the first 3/4 of the range the sound does not really change. Resonance appears only on the last 1/4 of the pot.
--
Re: 1973 VCF resonance
2015-12-07 by Julien Pauty
Thanks Ken,
I checked my board and nothing struck my eyes. This is a log pot. I believe the filter works as expected, it's just that I was expecting a more dramatic effect. I do have resonance before the last 1/4, but the effect is quite subtle on the first half of the pot. I also checked with my scope and resonance is there (if you have bad ears use your eyes :) ). I watched this video https://www.youtube.com/watch?v=TXc6P8quq0A and I seems to get a similar behavior.Show quoted textHide quoted text
2015-12-06 7:57 GMT+01:00 Ken Stone otherunicorn@... [cgs_synth] <cgs_synth@yahoogroups.com>:
By the last quarter of the pot, the resonance should be getting pretty full-on. Did you use a log pot? Check for errors in your resistor values, etc. Most likely, there is an error somewhere there.
If all seems okay, try reducing the value of the 68k connected to the wiper of the Q pot may help.--On Sun, Dec 6, 2015 at 9:29 AM, Julien Pauty julien.pauty@... [cgs_synth] <cgs_synth@yahoogroups.com> wrote:JulienCheers,Is that the expected behavior ?Hello,On my 1973 VCF, the useful range on the resonance pot is quite limited. For the first 3/4 of the range the sound does not really change. Resonance appears only on the last 1/4 of the pot.
Re: 1973 VCF resonance
2015-12-07 by Ken Stone
If you want something that really screams, you could try feeding some of its output back to its input via a mixer. The Steiner is also a much more "vicious" filter, although it can be temperamental.
KenShow quoted textHide quoted text
On Mon, Dec 7, 2015 at 9:32 PM, Julien Pauty julien.pauty@... [cgs_synth] <cgs_synth@yahoogroups.com> wrote:JulienCheers,Thanks Ken,I checked my board and nothing struck my eyes. This is a log pot. I believe the filter works as expected, it's just that I was expecting a more dramatic effect. I do have resonance before the last 1/4, but the effect is quite subtle on the first half of the pot. I also checked with my scope and resonance is there (if you have bad ears use your eyes :) ). I watched this video https://www.youtube.com/watch?v=TXc6P8quq0A and I seems to get a similar behavior.2015-12-06 7:57 GMT+01:00 Ken Stone otherunicorn@... [cgs_synth] <cgs_synth@yahoogroups.com>:By the last quarter of the pot, the resonance should be getting pretty full-on. Did you use a log pot? Check for errors in your resistor values, etc. Most likely, there is an error somewhere there.
If all seems okay, try reducing the value of the 68k connected to the wiper of the Q pot may help.--On Sun, Dec 6, 2015 at 9:29 AM, Julien Pauty julien.pauty@... [cgs_synth] <cgs_synth@yahoogroups.com> wrote:JulienCheers,Is that the expected behavior ?Hello,On my 1973 VCF, the useful range on the resonance pot is quite limited. For the first 3/4 of the range the sound does not really change. Resonance appears only on the last 1/4 of the pot.
--