Zombie Chorus

[animalejo]

Here is a Zombie Chorus, i add a volume pot and the R.G. Keen anticlicking.

Have fun!!!

[mictester]

Nice layout. The volume control is unnecessary because the effect has unity gain - the same level comes out as goes in! There are a couple of small improvements that can be made - the 10k / 15k potential divider that biases the input op-amp and the MN3007 isn't quite optimum - it will vary slightly from sample to sample of the MN3007. I used a 10k preset with 10k to ground and 12k to +9V at each end of the track. This allowed me to finely adjust the bias for the MN3007 to give minimum distortion. I also like to add a little pre-emphasis to the input op-amp, to give more treble content, then roll it off again at the output - this reduces the background hiss inherently produced by the BBD. I usually use an LM358 for the modulation oscillator - this reduces the current consumption quite a lot. I add a multicolour (4 - lead) LED to the panel. With a little extra work, I have red for bypassed, green for chorus - pulsing to yellow at the LFO rate - and orange - also pulsing - for vibrato mode. It's easy to see at a glance how it's set! I also intended to add a second LED for the Clone / Leslie / Normal switch, though this is less important.

My additions to the circuit don't detract from the original concept of a "minimal" design. They're just small tweaks that increase the functionality of the basic effect. Interestingly, a couple of guitarists who've bought these from me have asked for the controls to be internal presets, so that they can "set and forget" the effect - it's either on or off and gives them their own characteristic chorus sound every time.

Now that BBDs are beginning to get scarce ( and therefore much more expensive ), I think it's time to explore the digital domain.....

[animalejo]

Nice layout. The volume control is unnecessary because the effect has unity gain - the same level comes out as goes in! There are a couple of small improvements that can be made - the 10k / 15k potential divider that biases the input op-amp and the MN3007 isn't quite optimum - it will vary slightly from sample to sample of the MN3007. I used a 10k preset with 10k to ground and 12k to +9V at each end of the track. This allowed me to finely adjust the bias for the MN3007 to give minimum distortion. I also like to add a little pre-emphasis to the input op-amp, to give more treble content, then roll it off again at the output - this reduces the background hiss inherently produced by the BBD. I usually use an LM358 for the modulation oscillator - this reduces the current consumption quite a lot. I add a multicolour (4 - lead) LED to the panel. With a little extra work, I have red for bypassed, green for chorus - pulsing to yellow at the LFO rate - and orange - also pulsing - for vibrato mode. It's easy to see at a glance how it's set! I also intended to add a second LED for the Clone / Leslie / Normal switch, though this is less important.

My additions to the circuit don't detract from the original concept of a "minimal" design. They're just small tweaks that increase the functionality of the basic effect. Interestingly, a couple of guitarists who've bought these from me have asked for the controls to be internal presets, so that they can "set and forget" the effect - it's either on or off and gives them their own characteristic chorus sound every time.

Now that BBDs are beginning to get scarce ( and therefore much more expensive ), I think it's time to explore the digital domain.....

I needed a volume control, the level (in my case) is little more high than the normal, so is work perfect for me.
thanks for the tips !!
And last i love the analog stuff jjejeje, the digital world, in my opinion, is little artificial jejeje

Cheers from Chile !!