Bigfoot FX Magnavibe [traced]
- Zombie_Crush
- Breadboard Brother
Hi greenskull
yeah its pretty quiet now, even with a spot of EQ - for some reason the mistake in the pedal was causing another pedal to flutter, at first I thought it was the magnavibe, turn out to be my Boss RE-20.
Hope you have better luck
yeah its pretty quiet now, even with a spot of EQ - for some reason the mistake in the pedal was causing another pedal to flutter, at first I thought it was the magnavibe, turn out to be my Boss RE-20.
Hope you have better luck
- greenskull
- Resistor Ronker
Thanks Zombie_Crush, will have to tear it apart and see what I can do.
I added an op amp input buffer to mine, maybe that's causing a problem. Sounds really good though!
I added an op amp input buffer to mine, maybe that's causing a problem. Sounds really good though!
fuck smooth tone, fuck eric johnson - Seiche
- Zombie_Crush
- Breadboard Brother
Could well be
Good luck!
Good luck!
- Zombie_Crush
- Breadboard Brother
Nocentelli
any idea how i can get rid of the annoying clicking sound from the DPDT when switching on the new tremolo switching version?
am wondering if i could remedy it by wiring a ground wire to the DPDT's B1/A3 lugs - from either the - Circuit Ground or the Star-Ground on the input jack
would that work?
any idea how i can get rid of the annoying clicking sound from the DPDT when switching on the new tremolo switching version?
am wondering if i could remedy it by wiring a ground wire to the DPDT's B1/A3 lugs - from either the - Circuit Ground or the Star-Ground on the input jack
would that work?
- Nocentelli
- Tube Twister
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A3 is already grounded (or should be!), and if B1 is grounded it will effectively bypass the 6k8 resistor from Q1's emitter when you switch to vibrato - I'm guessing this will result in a large volume increase.Zombie_Crush wrote: am wondering if i could remedy it by wiring a ground wire to the DPDT's B1/A3 lugs - from either the - Circuit Ground or the Star-Ground on the input jack
would that work?
Hmmmm... I'll have a think about this, maybe someone else can chip. I'm ok with curing switch pop in bypass circuits, not sure the cause of it here.
modman wrote: ↑ Let's hope it's not a hit, because soldering up the same pedal everyday, is a sad life. It's that same ole devilish double bind again...
- Zombie_Crush
- Breadboard Brother
Yeah! i could see A3 is grounded to the board, but was wondering if maybe i need to do the same with B1, or B1 wired to A3
Have posted in debugging - hopefully we will get a response ... great vibe pedal all the same!
thanks again
Have posted in debugging - hopefully we will get a response ... great vibe pedal all the same!
thanks again
- pinkjimiphoton
- Transistor Tuner
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hey guys, anyone got any tips for my newb ass to minimize some of the background noise on this? i've noticed on the most recent pedalboard a lot of "hash" in the background when it's on...but no idea where to mess with the circuit...figure a judiciously placed cap or 3 ought to do it, right? but where? thanks in advance!
"When the power of love overcomes the love of power the world will know peace."
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Slava Ukraini!
- greenskull
- Resistor Ronker
Maybe not a direct answer, but the noise I was experiencing went away when using with a non-true bypass pedal (Fender Starcaster chorus).pinkjimiphoton wrote:hey guys, anyone got any tips for my newb ass to minimize some of the background noise on this? i've noticed on the most recent pedalboard a lot of "hash" in the background when it's on...but no idea where to mess with the circuit...figure a judiciously placed cap or 3 ought to do it, right? but where? thanks in advance!
fuck smooth tone, fuck eric johnson - Seiche
- RnFR
- Old Solderhand
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I didn't notice any excess noise when I breadboarded it. maybe a bad transistor? I really like this with a FET buffer in front. much clearer sound.
"You've converted me to Cubic thinking. Where do I sign up for the newsletter? I need to learn more about how I can break free from ONEism Death Math." - Soulsonic
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- pinkjimiphoton
- Transistor Tuner
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- my favorite amplifier: my own, a redesigned princeton
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there's videos that totally suck of about 90 of 'em here:
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it's just kinda hissy and a little rfi happening....maybe i need to add some power supply filtering in the pedal, or tack a small cap on somewhere?
unfortunately, no power for last few days, so can't play with it...may not have ac for a week this time. hoo boy, good times.
unfortunately, no power for last few days, so can't play with it...may not have ac for a week this time. hoo boy, good times.
"When the power of love overcomes the love of power the world will know peace."
Slava Ukraini!
Slava Ukraini!
- sugarinthegourd
- Breadboard Brother
Was just looking at this schematic and the associated layouts (great job, all!) and I wonder if this electrolytic cap wasn't drawn backwards? It makes more sense to me the other way 'round, and that's how it's oriented on the Wobbletron.
What do you think? Can someone with the original degooped circuit verify? I am hoping to breadboard it this weekend, so I'll see what the volategs are around that cap, and if it sounds different one way or the other.
Thanks
What do you think? Can someone with the original degooped circuit verify? I am hoping to breadboard it this weekend, so I'll see what the volategs are around that cap, and if it sounds different one way or the other.
Thanks
- Nocentelli
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I have an idea that Kindafuzzy has sold the original Magnavibe - But I may be wrong. It does seem odd that that cap is reversed compared to the Wobbletron, when they are so similar in every other way. However, the Magnavibe definitely works as-is, but I've never managed to get a single wobble out of the Wobbletron...
modman wrote: ↑ Let's hope it's not a hit, because soldering up the same pedal everyday, is a sad life. It's that same ole devilish double bind again...
- briggs
- Tube Twister
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All I can say is that the lfo is a phase shift oscillator in it's simplest form (thanks for that earthtones!): http://www.zen22142.zen.co.uk/Circuits/ ... lf_osc.htm
I sidestepped this issue by using non-polarised caps
I sidestepped this issue by using non-polarised caps
- Nocentelli
- Tube Twister
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Haha - Now that LFO schematic has the caps oriented differently to the Magnavibe AND the Wobbletron.....
modman wrote: ↑ Let's hope it's not a hit, because soldering up the same pedal everyday, is a sad life. It's that same ole devilish double bind again...
- KindaFuzzy
- Degoop Doctor
Good catch sugarinthegourd, you're right, it's oriented the other way on the original, which is long gone but I took good pics, so I could confirm stuff like this. http://www.flickr.com/photos/35422385@N ... 139715275/
- sugarinthegourd
- Breadboard Brother
I wonder if it matters & if these need to be polarized at all...looking at the LFO in the EA tremolo there's a similar circuit using non-electrolytic caps. May just be easiest & cheapest way to get 1uF caps...
- mmolteratx
- Degoop Doctor
Board mounted pots/LED layout project attached. Should fit in a 1590B no problem.
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- danielzink
- Resistor Ronker
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Magnavibe in a 1590a
Re-worked Dimebugg's layout a little in DIYLC.
Used one of the 99 cent optocouplers from Electronic Goldmine...spec'd out around 2meg so I tossed it in there. Works great.
Re-worked Dimebugg's layout a little in DIYLC.
Used one of the 99 cent optocouplers from Electronic Goldmine...spec'd out around 2meg so I tossed it in there. Works great.
http://www.danielzink.com
MoonWatcher wrote: Silent ain't better. If someone cracks the shitwind, I want to know what's headed my way. Silence is for the library and the cemetery.
just built one of these and it's sounds pretty much like a small old magnatone amp i worked on a few yrs back. i was just wondering how to increase the depth on this circuit. are there any values in the circuit to change or is it pretty much dependent solely on the ldr and led combo? thanks. rh
also any reason to use a mpsa18 or would any other bjt type be fine (2n5088 or 5089, etc).... thanks
also any reason to use a mpsa18 or would any other bjt type be fine (2n5088 or 5089, etc).... thanks
- pinkjimiphoton
- Transistor Tuner
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- my favorite amplifier: my own, a redesigned princeton
- Completed builds: so fucking many goddamn pedals it would make your ass hurt just looking at 'em all!!!!!
there's videos that totally suck of about 90 of 'em here:
http://youtube.com/666pinkster
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i tried forever to get a wobbletron going. only tim escobedo himself appears to have pulled it off.
any high gain transistor should work... i'd socket and play until it sounds good.
i haven't tried it yet, but i bet a mosfet like vn2222 would probably work in there, too...
any high gain transistor should work... i'd socket and play until it sounds good.
i haven't tried it yet, but i bet a mosfet like vn2222 would probably work in there, too...
"When the power of love overcomes the love of power the world will know peace."
Slava Ukraini!
Slava Ukraini!