BJFE - Emerald Green Distortion Machine  [traced]

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TheLemon
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Post by TheLemon »

I haven't seen this one brought to the table or discussed so I thought I'd mention it. Could it possibly be a HBOD or DRD variant with less high-end filtering?

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Post by Greg »

Very likely a similar design with different voicing I'd say.

IMO BJ is clever at tuning his circuits.. and what may appear simple or similar to something else generally produces a unique and great sounding effect.

This should probably go in the Members section for now, as there's no information attached to it.. but if anything is forthcoming it can be moved back into the technical area..
culturejam wrote: We are equal opportunity exposure artists.

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Post by modman »

Anybody we know :wink: ?
Emerald Green Distortion Machine (EGDM)
002 Donner
008 GM in NY
009 Jake E Lee
012 ToneRanger
014 Cubba
015 Cobra
025 (Sold) (Nitro finish)
030 Paxton
031 Michael Nice
052 Cobra
058 Fatback/PC
060 Patch
061 Joek86
065 zoooombiex
069 Rocky Bee
072 JofZ/ (Sold)
074 pacomac
075 sean sanchez/gkelm
076 Teahead
077 Craise Finton Kirk
078 Rollo Timbre/Tzamosti
082 JKoeth
084 mgrier1
090 Myron Stratis
099 Huckleboogie
100 cannikin
101 Enjoyer
106 Paxton
107 Racktifier/ptbarnum
109 Eskimo Joe
120 Paxton
122 murkat/Christer
126 kb892
128 cabo
133 I am Incinerator
135 Eyefly
136 Soulman
180 Nocaster
181 Andy Westhosen
186 I am Incinerator/DennisRayburn
191 justonwo
211 mrpicard
214 cosmonaut
http://www.bjfe.org/viewtopic.php?p=10565#p10565
Emerald Green Distortion machine ELECTRICAL SPECIFICATION
Z in at 1kHz
app. 500K
Pout 1kHz in 50k
app. 0uW35 RMS
Max load
app. 10K
Max output
1V peak
Max current consumption
3mA at 10V
Upper freq.-3dB
app. 10KHz
Max gain at 1KHz
app. 60 dB
Max inputsignal
3V peak
Suppl. Voltage range
7V5-18V
Power requirements
6F22 9V battery or DC eliminator 2,1 mm plug center negative and positive sleeve
http://www.mpamp.com/bjf/EGD_Owner.pdf
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Post by TheLemon »

Greg_G wrote:Very likely a similar design with different voicing I'd say.

IMO BJ is clever at tuning his circuits.. and what may appear simple or similar to something else generally produces a unique and great sounding effect.

This should probably go in the Members section for now, as there's no information attached to it.. but if anything is forthcoming it can be moved back into the technical area..
This is all true. Is this a gooped circuit as well?

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Post by Greg »

TheLemon wrote:
Greg_G wrote:Very likely a similar design with different voicing I'd say.

IMO BJ is clever at tuning his circuits.. and what may appear simple or similar to something else generally produces a unique and great sounding effect.

This should probably go in the Members section for now, as there's no information attached to it.. but if anything is forthcoming it can be moved back into the technical area..
This is all true. Is this a gooped circuit as well?
AFAIK all the hand built BJF pedals are gooped.
The Mad Professors aren't.
culturejam wrote: We are equal opportunity exposure artists.

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Post by TheLemon »

Greg_G wrote:
TheLemon wrote:
Greg_G wrote:Very likely a similar design with different voicing I'd say.

IMO BJ is clever at tuning his circuits.. and what may appear simple or similar to something else generally produces a unique and great sounding effect.

This should probably go in the Members section for now, as there's no information attached to it.. but if anything is forthcoming it can be moved back into the technical area..
This is all true. Is this a gooped circuit as well?
AFAIK all the hand built BJF pedals are gooped.
The Mad Professors aren't.
That's ashame as I'd really like to know what is going on inside the Model H and EGDM. Its always very interesting to see what Bjorn does to get a certain effect.

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Post by modman »

TheLemon wrote:That's a shame as I'd really like to know what is going on inside the Model H and EGDM. Its always very interesting to see what Bjorn does to get a certain effect.
Please, if you would be truly interested in this you would spend time breadboarding the Dyna Red/Honey Bee schematics and playing with parts. Or better even, the Rat schematic: trying equivalent opamps, other tonestacks, removing the buffers, that kind of stuff...
TheLemon wrote:Its always very interesting to see what Bjorn does to get a certain effect.
Yes, experimenting without actually knowing what you're doing can really be educational. I mean that, truly... So go for it!
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Post by TheLemon »

I've thought about breadboarding all of those things, I already have a few ideas in mind. Thanks for the help!

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Post by BJF »

TheLemon wrote:
Greg_G wrote:
TheLemon wrote:
Greg_G wrote:Very likely a similar design with different voicing I'd say.

IMO BJ is clever at tuning his circuits.. and what may appear simple or similar to something else generally produces a unique and great sounding effect.

This should probably go in the Members section for now, as there's no information attached to it.. but if anything is forthcoming it can be moved back into the technical area..
This is all true. Is this a gooped circuit as well?
AFAIK all the hand built BJF pedals are gooped.
The Mad Professors aren't.
That's ashame as I'd really like to know what is going on inside the Model H and EGDM. Its always very interesting to see what Bjorn does to get a certain effect.
Hi,

Well sometimes I'd need the headspeed.

You would find if you took the EGDM apart three transistors........ah but the the rest is just workingpoints and filtering.

So you'd mean that you go to this site to find scheamtics of my designs so that you can make copies and sell those on marketplaces like TGP?

I believe I did see something to that effect- not that I'd mind if you'd build something for your own personal pleasure but to use my name and my brandname and modelnames in sales auctions?
Look you can use your own name and sell whatever you'd like under Lemoneffects or whatever.

Again a circuit has no value unless connected to a name.

Ah, but do not take this too seriously- I've seen enough less good to be upset just telling as I see it

Have fun
BJ

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Post by IvIark »

No one in this thread has spoken about cloning and selling your designs Bjorn, you're almost trying to read something into it that doesn't exist. Unfortunately it's your own policy of gooping that piques curiosity.
"If anyone is a 'genius' for putting jacks in such a pedal in the only spot where they could physically fit, then I assume I too am a genius for correctly inserting my legs into my pants this morning." - candletears7 - TGP

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Post by Greg »

IvIark wrote:No one in this thread has spoken about cloning and selling your designs Bjorn, you're almost trying to read something into it that doesn't exist. Unfortunately it's your own policy of gooping that piques curiosity.
I think Bjorn is referring to this: http://acapella.harmony-central.com/sho ... ?t=2397966
culturejam wrote: We are equal opportunity exposure artists.

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Post by IvIark »

It was one on TGP, he's already told me. Fair enough then IMO
"If anyone is a 'genius' for putting jacks in such a pedal in the only spot where they could physically fit, then I assume I too am a genius for correctly inserting my legs into my pants this morning." - candletears7 - TGP

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Post by Greg »

If someone builds a circuit to try it, decides it's not for them.. and sells the pedal, I think that's pretty normal behaviour.

Building exact clones in number and selling them, especially if quoting the original builder's name to do so.. I have a problem with.

It looks to me like 'The Lemon' just built a one off of these pedals to try ?
culturejam wrote: We are equal opportunity exposure artists.

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Post by the3secondrule »

I don't think there's a schem for this one yet.


I have one, and I'd like to build another - who wants pics?
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Post by the3secondrule »

I'll get better pics of both sides when time permits, but heres a start

Image

Image
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Post by soulsonic »

No other interest here? I actually have one in my possession at the moment. I hadn't bothered to trace it because I figured it had already been done long ago (since it's a popular BJF design). Now I do a search and see this thread with some photos and no tracing work...
"Analog electronics in music is dead. Analog effects pedal design is a dead art." - Fran

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Post by soulsonic »

And why is this thread in the wrong section?!
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Post by BJF »

Hi,

Here you go:
http://tagboardeffects.blogspot.se/sear ... l/BJF%2FMP

And no I don't mind and never did if anyone wants to build one for their own use or a friend.

Fun note perhaps is that when doing the Bearfoot version some nice 2N1309 had been scouted for another model and I could not resist to try and liked that.
Original BJF model has same circuit but all were made with silicon metal cans medium gain drivers.

have fun
BJ
BJF Electronics

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Post by soulsonic »

Thanks. What can you tell me about the large "2A1200" diodes you use for clipping? Are they standard silicon rectifier diodes?
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