Ive herd so many different sounding clips. Mine doesnt sound lieke the really nice ones. There are mods on the ggg site, but does any one have any other ideas or know any other mods??
Also are there any sound clips of the null modded ringer and the filter modded ringer??
My GR isnt quite as smooth as the one on the ggg sites youtube sample clip link. And it sound nowhere near as clean and sparkly as on the end of danos demo of the fuzz lab on beavisaudio.com. If you listen to it, it sounds nothing like the other ringers!! Did he mod it woth null or filter mods?
Mine sounded awful at first, until I changed the diodes. It'll sound much better with germanium or Schottky diodes than it will with silicon. Try one of those and see what you think.
Diodes with smaller forward voltages work better. The null trimmer that JC Maillet has posted at vivaanalog also helps. The basic circuit itself, however, is nothing terribly special, and generally benefits from feeding it a boosted signal with a bit of top end rolled off. I stuck a simple one-transistor booster as a front-end in mine, and inserted a 3-position toggle to give minimal, moderate, and higher boost to the input. To compensate for the boost, I replaced the 47k ground resistor on the output with a 47k log pot. It's still not a great pedal.
I've built a few variations of the ringer and on one I replaced R6 10K emitter resistor to ground with a pot which varies the amount of the octave signal and full ccw turns the pedal into a stright fuzz.
QuoteI've built a few variations of the ringer and on one I replaced R6 10K emitter resistor to ground with a pot which varies the amount of the octave signal and full ccw turns the pedal into a stright fuzz.
drewl, i did the same thing to mine. it definately increases the versatility of the pedal. the only problem was a scratchy pot. i wonder if a decoupling cap before the pot would work out?
i wonder if anyone has tried a low pass filter in this circuit. i'm guessing it would require an additional gain stage to get back up to unity. just curious if it would tame the gateyness??
Maybe put the LP right at the font end of the circuit to give it the same tonal response as having your tone knob rolled all the way down, then the booster, then the ringer. I have one built up but not boxed, so I may give this a whirl. Also, with the LP, you could make the resistor to ground switchable so you could have a choice between roll off and full range frequencies.
Not sure how much the might impact the overall input impedance, if at all.
Quote from: yunger on May 22, 2009, 08:45:50 PM
i wonder if anyone has tried a low pass filter in this circuit. i'm guessing it would require an additional gain stage to get back up to unity. just curious if it would tame the gateyness??
Hi, I drew up that idea a few years ago, it is the filter mod at GGG. It uses a dpdt switch to switch in the (3 pole lowpass) filter and increase the gain to make up for the losses in the filter. It's fun! It seems to make the octave noticable enough that in a loud band when you kick it on people can hear that something is different, rather than just having an especially gross distortion.
It doesn't help the gatedness, if you are looking for an ungated FWR octave the opamp based "super full wave octaver (http://www.lynx.net/~jc/superFullWave.html)" circuit at JC Maillet's Viva Analog site will do that.
I have one on my breadboard right now... I put a BS170 styled boost in front of the Green Ringer which seems to make for a more enjoyable experience. I had an LPB-1 in front, but it seemed a little muddy (nitpicking really). After tweaking the capacitors of the boost, it improved, but I liked the FET boost better. I utilized the carrier null mod from GGG, and also put a 50k volume pot in place of the the resistor on the output like Mark Hammer pointed out in an earlier response.
Sounds pretty cool... gnarly with a fuzz. I thought about putting a low pass filter in the front, but it's pretty quick and easy to use my guitars tone controls. My project didn't yield results as smooth as the GGG sound clips, but I have no idea what kind of guitar was used so it's hard to compare--I suspect that it may have been done with humbuckers (I use a strat). I do get a strong octave especially when using the guitar's tone control, and it seems to be enhanced by the booster...
I think that it's worth the effort to use your meter to measure and match the values of resistors/capacitors/diodes (C2 &C3, R5 &R6, R7&R8, R9&R10) as it improves the octave... Search the forum for the explanation. I used Germanium diodes (for what it's worth).
Jesse
I built a Green Ringer using both the Filter and null trimmer mods. It provides a pretty good octave. With the filter switch on the octave sounds almost cartoonish.
As a stand alone unit I have to agree:
Quote from: Mark Hammer on May 22, 2009, 09:36:20 AM
It's still not a great pedal.
However;Quote from: jessetrbo on May 24, 2009, 08:49:13 PM
Sounds pretty cool... gnarly with a fuzz.
It has the ability to make an "ordinary" (whatever that is :icon_lol:) sounding fuzz into a real beast.
QuoteI think that it's worth the effort to use your meter to measure and match the values of resistors/capacitors/diodes (C2 &C3, R5 &R6, R7&R8, R9&R10) as it improves the octave... Search the forum for the explanation.
IMHO, this makes a big difference. My first attempt at the GR wound up in my "box of shame". It just didn't live up to the hype. After reading about matching the components I pulled it out and did a rebuild. Now it's boxed up with a TSF and a BMP.
Fun, fun, fun! :icon_biggrin:
I bump a little this thread.
I'm working on a Green ringer and I want , too , incoporating a tone control in front of the circuit. But , people who made that, where have you put the tone control ? in first place (before the input booster) or after it ?
My idea is simple, a jfet booster at input, the octave up circuit (with null mod with pot (if it's really effective) or trim) and a final gain stage (JFET tilman boost) to have a decent volume with the gain knob at 0 . But I don't know where putting the tone control, it's to simulate the tone knob guitar rolled all the way down.
Hi all,
I just want to confirm how to add a volume control. It seems you can add a pot to the 47k resistor at the R12 spot on the GGG schematic? Can I use something like a 100k linear pot?
Also, you guys think the GGG Green Ringer kit could fit into a 1590a enclosure?
Thanks, I'm kinda a newbie, so appreciate the info. :)
A volume pot with the stock circuit is useless. It will be all time all the way up.
I'm working on a green ringer and I add a gain stage (bipolar transistor, AOP or JFet at the end of the green ringer to increase the volume output. I also put a tone control (simply a pot + cap linked to the ground)
Quote from: fuzzo on November 11, 2009, 01:17:19 PM
A volume pot with the stock circuit is useless. It will be all time all the way up.
It would be useless? Why/how so? I'm speaking of replacing the resistor with the pot.
It appears to me others on this very thread have done it:
Quote from: jessetrbo on May 24, 2009, 08:49:13 PMalso put a 50k volume pot in place of the the resistor on the output like Mark Hammer pointed out in an earlier response.
useless (for me) 'cause the octave up gives an unity gain, if you put a volume pot. instead of the 47K Resistor , it will be at max all the time because of the unity gain. (basically that will the same way a volume pedal works)
Mark Hammer added a boost stage in front of the circuit and so he needed to put a volume pot at the end ('cause with that configuration the output level is very lood)
But the best way to know is trying by yourself. ;)
With the right pickups and settings, it can sound cool, sorta sitar-ey.
Not that I have great need for a sorta-sitar-ey effect...
So I consider the GR as cool, but better when looked at as part of a greater circuit.
A bit of distortion and boosted input or output...the GR/? really starts to light up better and makes cool Octa-Ring-Mod-ish-Fuzzy tones.
With this or that [I like FF behind it, Phase etc., reverb] it can do a fairly decent ''Hazey Purple'' sound.
In the respect of being able to leave the Fuzz on and get to Octa-Ring type tones I see it as a feature, not a drawback, I generally want 1 stomp to take the tone from Fuzz to Octa, not Clean to Octa.
I've built a couple ringers and I really like the circuit. It's definitely a subtle one that reacts dramatically to how and what you play. I currently have one in the same box as a Red Llama, after reading speculation about the Way Huge Purple Platypus. I have each effect on a separate switch with the Llama boosting the Ringer. Not sure if it's really the Platypus, but it is a pretty cool sound.
I tweaked a little the circuit to create something I've in mind, but that's not exactly what I wanted.
Any ideas to make the octave up bigger and more present ?
Otherwise , I put a 25K + 56n liked between the first transistor base and the ground to have a kind of tone control, works good even if it eats a lot of volume (no a big deal if you put a gain stage at the end)
i built and it sounded very ordinary
tried a null mod, and nothin' happened
then i replaced the resistor at the collector of the second transistor with a 50 k pot, and finally i could find the null spot, and set it the way i like!
The way I see it, the Green Ringer may be one of the better known commercially available octave-up circuits out there, but not necessarily one of the best sounding, not the easiest to build, and it is often difficult to get configured correctly. I can't see the advantage of building one over many of the other octave-up variations out there.