Pro Co - Juggernaut

dosmun · Post by **dosmun** » 13 Jun 2008, 00:17

Here are some gut shots of the Pro Co Juggernaut. If someone wants to draw this out contact me and I will try to help with values etc. FYI both of the IC are MC1458's

salocin · Post by **salocin** » 13 Jun 2008, 03:29

Any chance you could get a slightly lighter version of the first photo? In the area where the opamp is, just above and to the right of the foot switch, I personally have a hard time telling which bits are joined. Not sure if that's just me though?

borislavgajic · Post by **borislavgajic** » 13 Jun 2008, 09:18

thanks Dosmun.....

Bernardduur · Post by **Bernardduur** » 13 Jun 2008, 09:39

Awesome!

Rocket Roll · Post by **Rocket Roll** » 13 Jun 2008, 13:02

dosmun · Post by **dosmun** » 13 Jun 2008, 13:36

I will get some more info as far as values etc. hopefully over the weekend.

Stompmodder · Post by **Stompmodder** » 13 Jun 2008, 17:06

A Bass Ratt!! Yes!

Please let us know your impression about the sound of this effect.

dosmun · Post by **dosmun** » 13 Jun 2008, 21:38

I only played it a little bit but it sounds more like a traditional fuzz than a Rat when you crank the distortion up. It actually is on the edge of being sputtery.

dosmun · Post by **dosmun** » 13 Jun 2008, 21:45

Her are some values. I roughly measured the pots in circuit and they all appear to be 100K except the 2nd one from the left which is 50K.

All green caps are .022
All ceramics are 100pF except cap to far left by opamp it is 30pF and the one at the top middle by the diode is .01uF (103)

There are 3 values of Electros:
The large one at the far right is 47uF
Smallest ones are all 10uF (6 of them across the middle of the circuit
Larger ones are 100uF (4 at the top and 2 at the bottom of the circuit

Transister is 5458

Opamps are MC1458's

soulsonic · Post by **soulsonic** » 13 Jun 2008, 23:57

Thanks!

noelgrassy · Post by **noelgrassy** » 14 Jun 2008, 13:49

Interesting pedal.

I see where the PC sez, "Re-Issue". I don't remember these at all for some reason. What years did they first exist in? Isn't it designed primarily for the bass? Thanks for the great detail in the pics. I'll bet some folks will want to build these even if they are priced affordably.[relatively speaking of course]

OT: I opted for the DeuceTone. It actually sounds quite a bit better than I remember my Rat ever sounding. They've implemented slide switches in each channel to approximate the Grandlaff's diode switcher. They're pop-rivetted to the case

and one of 'ems skewed

This is probably in keeping with their "bullet-proof" design model. A tiny toggle can be rendered useless with an occaissional python boot. Plus, they probably cost at least twice as much as a SPDT slide switch.
The channels can be run in series or as 2 separate voices of distortion. Which more than makes up for the regretably oversized footprint.

dosmun · Post by **dosmun** » 14 Jun 2008, 14:03

Check out my Rat history page for more info and some pics of the early Juggernaut
http://webpages.charter.net/daosmun/

dosmun · Post by **dosmun** » 14 Jun 2008, 14:06

If anyone is interested in buying one, there is one that is ending today on Ebay and looks like it will go cheap. https://cgi.ebay.com/ws/eBayISAPI.dll?V ... :IT&ih=016

soulsonic · Post by **soulsonic** » 14 Jun 2008, 22:20

dosmun wrote:If anyone is interested in buying one, there is one that is ending today on Ebay and looks like it will go cheap. https://cgi.ebay.com/ws/eBayISAPI.dll?V ... :IT&ih=016

Looks like I won! Many thanks, sir!

Now I will be able to guarantee us an accurate trace.

Fuzzer · Post by **Fuzzer** » 14 Jun 2008, 23:23

You sir, are great.

Bernardduur · Post by **Bernardduur** » 15 Jun 2008, 10:41

dosmun · Post by **dosmun** » 15 Jun 2008, 14:15

soulsonic wrote:
dosmun wrote:If anyone is interested in buying one, there is one that is ending today on Ebay and looks like it will go cheap. https://cgi.ebay.com/ws/eBayISAPI.dll?V ... :IT&ih=016
Looks like I won! Many thanks, sir!
Now I will be able to guarantee us an accurate trace.

I won mine just a couple of days ago as well. $60 shipped. Mine didn't work but was new. Problem ended up being a nut missing under the board where it mounts to the pots so it was shorting against the case.

You don't see these very often let alone for under $100. Congrats on the deal Soulsonic.

bajaman · Post by **bajaman** » 15 Jun 2008, 21:03

anyone want a PCB clone for the Juggernaut

- let me know if interested

bajaman · Post by **bajaman** » 17 Jun 2008, 10:58

Here is the Juggernaut ready to etch PCB - 1200 dots per inch resolution - scale is in tenths of an inch
members/bajaman/JUGGERNAUT/BAJA%20ProCo ... %20PCB.png

bajaman

Bernardduur · Post by **Bernardduur** » 17 Jun 2008, 11:33

Awesome;

Now we onlu need to figure out what goes where

Pro Co - Juggernaut [schematic]