Ibanez OD850 (first series)

Dirk_Hendrik · Post by **Dirk_Hendrik** » 10 Oct 2010, 15:55

Which one?

This one (thanks Discofreq):

More info:
http://www.effectsdatabase.com/model/ibanez/first/od850

Schematic:

Ibanez_OD850.pdf: (17.96 KiB) Downloaded 382 times

Copper layout: (let your printer do the resizing in the print menu (use Irfan View)!!)

Component placement:

Enjoy the build.

roseblood11 · Post by **roseblood11** » 10 Oct 2010, 18:57

Great work, many thanx for sharing that!!!

Do you know what kind of caps was used in the original? And which diodes for clipping?

roseblood11 · Post by **roseblood11** » 10 Oct 2010, 19:00

Edit: Analogguru says that diodes are 1n4148:
http://analogguru.an.ohost.de/193/schem ... e_1974.gif

borislavgajic · Post by **borislavgajic** » 10 Oct 2010, 19:20

tears of happyness

Thanks
Boris

Greg · Post by **Greg** » 10 Oct 2010, 22:44

I didn't know you guys were after this one.. there's been a schematic floating around the net for a long time..
Anyway, I have one in the cupboard, so any questions.. fire away.

A Big Muff derivative.

Nice work on the layout BTW Dirk.

DrNomis · Post by **DrNomis** » 11 Oct 2010, 00:01

Cool!!!....Thanks Dirk,I'll deffinitely have a go at building this one....

I just had a look at the schematic,doesn't it look alot like the Big Muff Pi?....

Dirk_Hendrik · Post by **Dirk_Hendrik** » 11 Oct 2010, 06:28

DrNomis wrote:Cool!!!....Thanks Dirk,I'll deffinitely have a go at building this one....

I just had a look at the schematic,doesn't it look alot like the Big Muff Pi?....

Naturally. The OD850, this one as well as the later square button version, are big muff clones. Same for the Ibanez OD9 (not the later Maxon) as well as the SF5/FZ5 sixties fuzz. All Big muff clones.

rasta_maleek · Post by **rasta_maleek** » 11 Oct 2010, 06:35

thanks for sharing Dirk, i love transistor overdrives

DrNomis · Post by **DrNomis** » 11 Oct 2010, 06:41

So....Ibanez took the Big Muff pedal schematic,and put it into a pedal case the size of a TS808?....Hmmmm.....

I thought that the circuit was going to be derived from the TS series,I looked at the circuit board layout,fully expecting the IC in a prominent position,then I had to do a "double-take",then I thought to myself..."Eh?..what gives?",the pic you posted was the very first time I've ever seen one of those,Dirk...

Duckman · Post by **Duckman** » 11 Oct 2010, 08:32

Kind of James tone section, but w/fixed bass... Add a bass pot can be easy, I guess

Greg · Post by **Greg** » 11 Oct 2010, 09:40

Dirk.. your schematic is quite different from the one that's been around for a while..
Did you trace it yourself ?

If need be, I can check mine, but it's not as simple as later Maxon/Ibanez boxes, as the circuit is mounted inside a plastic box which seems to be attached to the pots.. and obviously these are pretty valuable.

analogguru · Post by **analogguru** » 11 Oct 2010, 10:09

Greg_G wrote:Dirk.. your schematic is quite different from the one that's been around for a while..
Did you trace it yourself ?

Can you tell me one reason why to trust a fuzzcentral schematic ?
The fuzzcentral schematic is NOT from the first version - it is a stripped down version from the OD-850 with FET-switching.

Except some component values Dirk´s schematic is identical to mine - and I traced it myself (from guts).

analogguru

Greg · Post by **Greg** » 11 Oct 2010, 10:24

analogguru wrote: Can you tell me one reason why to trust a fuzzcentral schematic ?
The fuzzcentral schematic is NOT from the first version - it is a stripped down version from the OD-850 with FET-switching.

Except some component values Dirk´s schematic is identical to mine - and I traced it myself (from guts).

analogguru

Cool.. thanks for clarifying analogguru.. I hadn't seen your schematic before.

When was the FET switching version built ?
Was it a wider case ?

roseblood11 · Post by **roseblood11** » 11 Oct 2010, 12:06

It had the same enclosure, I think they only wanted to use a cheaper switch. I´ve read somewhere that it was build from 79 to 81:

Would be really great to have enclosures like that for diy projects!

roseblood11 · Post by **roseblood11** » 11 Oct 2010, 12:11

... at the second view, I´m not sure if both enclosures are identical. Maybe the later one is the size of the original TS808?

Duckman · Post by **Duckman** » 11 Oct 2010, 12:21

roseblood11 wrote:Would be really great to have enclosures like that for diy projects!

I see some similar here, in the forum, but didn't remember where

I'll be searching

Duckman · Post by **Duckman** » 11 Oct 2010, 14:32

Duckman wrote:I see some similar here, in the forum, but didn't remember where I'll be searching

After two hours... nothing

I think my memory is fooling me

mattpas · Post by **mattpas** » 11 Oct 2010, 21:42

I made both versions last year and really like V2. V1 is close to one of the many different Triangles out there ans V2 is closer to a Ram's Head

gilmour_pugliese · Post by **gilmour_pugliese** » 12 Oct 2010, 08:37

great work...
any chance to have a strip layout?

roseblood11 · Post by **roseblood11** » 12 Oct 2010, 11:41

Search for a good layout for the Big Muff, use it as a starting point and draw your own layout

Should be easy...