Mad Professor Sweet Honey Overdrive

Oliphaunt · Post by **Oliphaunt** » 20 Jun 2010, 17:39

Maybe he is just saving money by leaving off the goop?

Thanks for the work on this pedal, the recording sounds great and I look forward to putting one of these together!

Website · Post by **Lonkero** » 20 Jun 2010, 17:53

Greg_G wrote:
blahblah wrote: I'm not especially convinced that the single led clipping stage at the end is really doing much for the sound.
You could be right.. does it light up ? (not that that's proof that it's not clipping if it doesn't, but I guess it would be proof that it is ?)

Crank all up, play hard and put DMM to diodes place to see if the voltage exceeds the diode clipping stage. If it does, the diode has some meaning, right?

culturejam · Post by **culturejam** » 20 Jun 2010, 18:49

I've never been able to get LEDs to light when they are in a feedback loop. They light up easily between signal and ground, however.

For example, in a Tubescreamer, LEDs make a noticeable difference vs no diodes, but they don't light up. At least in none I have observed.

Dirk_Hendrik · Post by **Dirk_Hendrik** » 20 Jun 2010, 19:29

Oliphaunt wrote:Maybe he is just saving money by leaving off the goop?

Don't be so cynical! These are built with an automated process. That means you get more reliablity at a lower price!!

bajaman · Post by **bajaman** » 20 Jun 2010, 21:39

How sure are you that C8 connects to the junction of R17 and R18?
I cannot see a connecting trace on any of the photos unfortunately.
It does share a lot of design features (and parts values) with the MP Dyna Red and BJF Honey Bee though.
cheers
bajaman

analogguru · Post by **analogguru** » 20 Jun 2010, 22:30

I am wondering if C1 is really only 4n7, simply because the BJF - Honey Bee uses a 47n in this position.

analogguru

bajaman · Post by **bajaman** » 20 Jun 2010, 23:55

Okay

thanks
bajaman

Oliphaunt · Post by **Oliphaunt** » 21 Jun 2010, 15:29

Dirk_Hendrik wrote:
Oliphaunt wrote:Maybe he is just saving money by leaving off the goop?
Don't be so cynical! These are built with an automated process. That means you get more reliablity at a lower price!!

Only meant it as a (not very good) joke referring to the huge amount of goop on ibodog2's pedal, no cynicism or bias towards surface mount design implied.

quaternotetriplet · Post by **quaternotetriplet** » 22 Jun 2010, 05:44

do we have a verified schematics?

Kuu_uni · Post by **Kuu_uni** » 24 Jun 2010, 13:39

Hi! I'm a japanese high school student.
I'm not a very good at English, might be wrong.

http://picasaweb.google.com/11648940404 ... 3121111890

This is my Sweet Honey Overdrive...
I bought it in Tokyo Japan.
This is the inside. I hope you could help.

Thank you!

Greg · Post by **Greg** » 24 Jun 2010, 13:42

Kuu_uni wrote:Hi! I'm a japanese high school student.
I'm not a very good at English, might be wrong.

http://picasaweb.google.com/11648940404 ... 3121111890

This is my Sweet Honey Overdrive...
I bought it in Tokyo Japan.
This is the inside. I hope you could help.

Thank you!

WTF - no Goop !!
Thanks for posting.

Kuu_uni · Post by **Kuu_uni** » 24 Jun 2010, 14:20

Greg_G wrote:
Kuu_uni wrote:Hi! I'm a japanese high school student.
I'm not a very good at English, might be wrong.

http://picasaweb.google.com/11648940404 ... 3121111890

This is my Sweet Honey Overdrive...
I bought it in Tokyo Japan.
This is the inside. I hope you could help.

Thank you!
WTF - no Goop !!
Thanks for posting.

Thanks reply!!!!The black box, put the cut with a knife heated, it was like this!
Now, my friend analyzed it.
Please look at the pictures again!

http://picasaweb.google.com/11648940404 ... Stompboxes#

Thank you!

Kuu_uni · Post by **Kuu_uni** » 24 Jun 2010, 14:40

>>Did your pedal have the rubber casing around the PCB?

Yes!!That's right!
Now, it is not at hand. My friend is analyzing the circuit!!

Ummm.I see...

Thank you!!

culturejam · Post by **culturejam** » 24 Jun 2010, 14:45

A hot knife, eh? Great idea.

Kuu_uni · Post by **Kuu_uni** » 24 Jun 2010, 14:56

culturejam wrote:A hot knife, eh? Great idea.

Thank you!
The heated cutter, you can cut smoothly!!

Kuu_uni · Post by **Kuu_uni** » 26 Jun 2010, 15:15

Sorry for the late replies

I 'm glad that you were able to complete it

!!!

>Kuu_uni, when you receive the pedal from your friend, could you tell us the marked capacitor values? I can see some of them from your photos, but not all of them.
>>Okay!　I will try too! For accurate schematic!

thanks!

roseblood11 · Post by **roseblood11** » 29 Jun 2010, 19:27

Do I have this right:
The layout is verified, some of the cap values still are not?

btw: Great work, folks!!!

roseblood11 · Post by **roseblood11** » 29 Jun 2010, 21:02

That´s all? I´ll order the parts tomorrow!

Maybe it could be interesting to add a "Voice" control, similar to the one in the Zendrive:
download/file.php?id=3854&mode=view

regards, Immo

culturejam · Post by **culturejam** » 29 Jun 2010, 22:43

roseblood11 wrote:That´s all?

It's that always how these things turn out?

briggs · Post by **briggs** » 29 Jun 2010, 23:24

I can already see a few potential mods to this one. The actual "Focus" control - I used something like this in my Hummingbird overdrive which I published about a year ago - I would maybe up this from 50 to 100KB, it'll make the pedal slightly brighter and add a slight amount of top end gain and fizz when set to a higher value. Also a focus/zendrive bass control (as roseblood says) on the first opamp stage to allow frequency response in this stage to be fiddled (add a 10k pot with a r17 at maybe 470 or 220 ohm). Maybe reduce r11 to a slightly lower value of 2k1-1k2 for a slight gain increase in the second stage but reduce c11 to stop the bass freqs being boosted at around 180-220Hz in that stage. Also you could add a variable clipping setup (again, see my Hummingbird overdrive) on the first stage to adjust the fizz and dynamic response in the stage. I'd also alter how D2 was implemented to allow a higher headroom for the OP275 opamp too...

Mad Professor Sweet Honey Overdrive [traced]