Green Ringer.. I builded its!

[thekage]

So I bought the Green Ringer kit from GGG. Took about 3 hours roughly to solder and wire. No paint yet. Plugged it in and it works like a charm. I was afraid I would have to check connections and solder joints and trouble shoot it, but no. It worked like a champ. Everyone says this thing rolls off the lows and it does. It is the octave up plus some distortion almost ring modish. I wish It had a blend knob.
One of the things I am going to try is changing the input and output caps for larger values, see if that let's more bass freq through. If that doesn't work, I will have to see what's required to add a blend knob of some sort. Anywho. It is still an aweseomly easy build and sounds very cool even if it does kill some lows.

[phatbassdood]

so did you change out the caps yet? I'm considering building one of these and would be interested in how things went.

[Swimming Bird]

Green ringer clones are bunches of fun, congrats! Mine is BYOC and has a kthuhlu on it.

Originally Posted by thekage

It is the octave up plus some distortion almost ring modish.

Heh, well, yes. As I understand it analog octave up works by doubling your signal and using it as both signals of the ring mod. If you use your neck pickup you'll get a sound that's much more purely the octave up. Also, if you play a chord, you will get ring mod sounds based on the intervals used.

There's a clean blend schematic floating around on the effects board somewhere -- probably worth doing if the low-end loss really bothers you.

[Taylor Livingston]

Originally Posted by Swimming Bird

Green ringer clones are bunches of fun, congrats! Mine is BYOC and has a kthuhlu on it.



Heh, well, yes. As I understand it analog octave up works by doubling your signal and using it as both signals of the ring mod.

Not really the case, but it does sound like ring modulation. The Green Ringer and similar analog octaves perform full wave rectification, which means flipping the negative half of a waveform into the positive half. This is exactly what happens in power supplies, too, to turn the alternating current coming out of your wall into a direct current.

By flipping the - into the +, you now have twice as many peaks in the waveform, which is equivalent to double the pitch. The problem is that your bass isn't a sine wave, so all the harmonics get squared (squared as in 5², not square wave) just like the fundamental, and the harmonics and their squares produce intermodulation distortion.

Putting a lowpass filter (which can be as simple as one resistor and one cap, look up "RC lowpass filter") before the rectification might decrease intermodulation.

[phatbassdood]

Originally Posted by Swimming Bird

Green ringer clones are bunches of fun, congrats! Mine is BYOC and has a kthuhlu on it.



Heh, well, yes. As I understand it analog octave up works by doubling your signal and using it as both signals of the ring mod. If you use your neck pickup you'll get a sound that's much more purely the octave up. Also, if you play a chord, you will get ring mod sounds based on the intervals used.

There's a clean blend schematic floating around on the effects board somewhere -- probably worth doing if the low-end loss really bothers you.

I searched the effects forum, but couldn't find any mention of a kthuhlu, can you elaborate pls?

[Swimming Bird]

Originally Posted by conical johnson

Not really the case, but it does sound like ring modulation. The Green Ringer and similar analog octaves perform full wave rectification, which means flipping the negative half of a waveform into the positive half. This is exactly what happens in power supplies, too, to turn the alternating current coming out of your wall into a direct current.

By flipping the - into the +, you now have twice as many peaks in the waveform, which is equivalent to double the pitch. The problem is that your bass isn't a sine wave, so all the harmonics get squared (squared as in 5², not square wave) just like the fundamental, and the harmonics and their squares produce intermodulation distortion.

Oh. Well, one more in a lifetime of errors. Thanks the info!

As for kthuhlu, I'll post a pic when I get home.

[thekage]

I haven't yet.
I would be interested in seeing that mod on the clean blend.

[Swimming Bird]

[Taylor Livingston]

I think maybe you tried to link to something inside your email box. That doesn't work.