Ceriatone Forum

here's a very quick and dirty clip done with an edwards LP with P90s. Previously, this would have been bright and shrill.

I'm getting the Illustrator file from Nik and I'll post an updated layout with the new components highlighted.

www.sheetsofsound.net/demos/effectrodevibe.mp3

if you're having problems getting the mp3 to play try this:

www.sheetsofsound.net/demos/effectrodevibe.wma

The clip didn't download as you'd expect. Did anyone else have trouble? Might just be me or is there a procedure to get to these clips that I might not know of??

Jack, it would be awesome if you can follow-through with posting some layout highlights per that post I made a day or so ago. I'm confident that will add clarity to morons like myself that need to be led by the hand just a tad....

Cheers!
Ken
http://tupelobluemusic.com
http://myspace.com/tupelobluemusic

Jack, would you mind posting as a PDF? Its easier to get a good print.

I also couldn't get the clip to play properly either


Many Thanks

try this


www.sheetsofsound.net/demos/effectrodevibe.wma

Nope sorry Jack, I get this.

Jack,
Second link worked fine for me, first would not.

Most importantly though, Great clip!
I'm assuming that was the OD channel, and maybe your Klienulator in the loop. Can you share anything about the amp settings? PAB, etc?

Thanks as always for your sharing,
JT

The second link works if you open the URL in Media player Classic and VLC Player, but not in Windows Media player v11. Thank you Billy Gates!

Hi all,

  AI sent to Jaz, with all mods highlighted in red already for the values.

  Except for 3K3 resistor on PS board.

  Jaz can export out as jpeg, actually, from AI.

Thanks!

Nik

Any plans to incorporate some or all of these changes into the standard Overtone?

Anyone got a european source and part number for the 100K Lin pot for the level pot
       Thanks.

Jack,

That sounds awesome! Would you please write a summary of your mods? I read that you were waiting for some stuff from Mouser and don't know where you finally landed with all of the mods. Your help is much appreciated!!

here's the diagram I made with "my" mods. Thanks to Gil Ayan and Scott Lerner for the suggestions. I merely did the soldering. Gil and Scott did the engineering.

Changes are indicated in red.

http://www.sheetsofsound.net/images/OvertoneModded.pdf

thanks Jack, Ayan and Scott!  For some reason, the diagram is truncated when I open it. ???

Nevermind. Works fine on my computer at home. Must be something wierd with my work PC.

Thanks again!

Yep, them are the standard mods.  Thanks for layout Jack.

That's just what the doctor ordered!

Thanks much.

Ken

What do these mods do? Tonewise?

I have an overtone and interested in what the mod does for it

They make the cleans sweeter and less peaky and make the leads smoother and less raspy. Note that my clips are recorded with the treble and presence at 10 O'Clock. If you want to get the original more raspy tone you can turn the tone and presence up to 12 O'Clock but you can't get the smoother sound with the old circuit. The cleans on my amp are now world class. John Mayeresque!

Thanks Jack for all your help....I will now get on and order my parts... I'm excited to hear the cleans are improved.  I too like the SRV lenny vibe with a strat

Jack,

what resistance is your Overdrive trimmer set to?  I love your P90 clip!

Not sure. The adjustment is up almost 1/2 way but i'm not sure if the pot is linear or not.

Jack,

Sorry if you've mentioned this elsewhere - at work so having to be sneeky and can't browse all the threads:

What speakers are you using with you OTS?

Great Clip!  Thanks too for the mod layout, makes things really clear.  So - I built my OTS in early April (completed 04/08), my kit was based on the 12/07 layout - so I did the 220k pre-od-trimmer mod with pretty nice results, but .. think I will try the added mods you've done.  I was on T.A.G. and saw Gil and Scott's posts, but I don't recall the PS Filter beef-up (basically to 75uF from 50uF I think), also somehow missed the OD cathode cap/resistor mods and plate resistor increases.  I thought maybe you were going for ODS #124, but see that's not it.  I guess I just missed the threads where these mods were discussed, so I really really appreciate you posting and doc'ing them here.  I can imagine the PS mods smooth things more, and the also bringing the OD plate voltages down some more should help (even after the 220k mod I did, I have more gain than I'll ever want here).  I am jazzed about trying these out - the soldering iron is warming up forthwith!

Cheers and thanks again - I still have to post my own little build thread with some pix soon.  I really want to get a new cab, or mod mine, like one picture I saw where the top is cut out and there's a plexiglas panel over the circuit - so you can see this work-of-art ODS guts without tearing her open.   I imagine most folks have seen that amp.  A real monument to HAD and the ODS.

Stephen

May I ask,  who came up with the mods?  are they consistant with the original dumbles?

Well Jack Zucker posted them here.
Gil Ayan and Scott Learner passed them to him. These mods are done with years of experience on dumbles amps. These mods make the amp balanced on the clean, overdrive and the pre-amp boost.
Of course there are more possibilities: if you're interested in that kind of info; check ampgarage.com. There's tons of information over there. Interesting threads with Ayan, Funk(bludoamps), Dogears(scott learner) and also the maker of Carrol Ann amps(67 plexi is his nick?) Especcially the last one has done some really interesting posting, but you have to dig yourself in tube tech stuff, otherwise it's a nightmare ;D

I guess I need to order the parts.
 8)
Mark

How are the trannies? 

In my opinion the tranny's are very good. There's no chance I'll swap them for MM or original Fender tranny's.