Ceriatone Forum

As far as I can see Nik has changed the OD level pot to 100K and pre OD resistor from 150K to 220K. Exactly what I'm planing to do with mine OT  ;).
That jumper wire on the loop is still there.  ???



Everything else looks the same as far as I can tell.
 8)

mcinku
What exactly does that jumper wire do. I am trying to learn all I can but I really feel ignorant sometimes. The other thing is how much change is there from #124, which is 100 watts. And  how do I optimize this amp to run el34's..man I have a long way to go in understanding all of this.
How is it going for you. :)
Burnie 8) :P

About the jumper wire some info here...
http://ceriatoneforum.com/index.php?topic=207.0 (http://ceriatoneforum.com/index.php?topic=207.0)
...basically it takes out that loop network (resistor and cap), so why put those in, if the jumper wire is there 
???

I'm learning as well. Most of the stuff about ODS style amps, I learned at Amp Garage forum. Those guys there are quite intimidating, so some electrical knowledge is almost a must. I at least have some... but a lot is lost since high school.
 :'(

So is the current layout incorrect? I'd like to know before i get to that stage.

Thanks

Hywel Harris

Correct is a relative term...
...if you are after #124 than it's wrong, if you're after D'Lite style amp or many other D style amps I've seen than it's OK, except lose that resistor and cap, it's not needed.
 :)
the rest of the layout is fine

What happens when you take that resister and cap out of the loop. I am like you mcinku, I had some electronics training but I have to start over, it's all good though, I enjoy everything about music including this.

As far as I know that resistor and cap will do nothing if that jumper wire is there. It is the same as you would have a patch cable plugged in the loop.
 :)

mcincu, what are the benefits doing this?

pre od resistor 220K make the overdrive less fuzzy in the low.
Od level pot 100K makes a smoother transition from light overdrive to a heavy overdrive. When the level pot is 250K the transition is less subtle.
Check the ampgarage topic; overtone guts pics. There is a very detailed description there.

...exactly what erwin said.
I'm also hoping for smaller volume jump from clean to OD.

Currently I'm waiting for the parts, once I have it, I'll report back about my findings.
 ;)

I have no technical insight at all, but BGsoul was fairly soecific about a few alterations. I'm very curious to hear if the current lay out is an improvement.