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Author Topic: Tweaked Layout  (Read 164193 times)
Nathan
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« Reply #90 on: July 04, 2008, 10:57:57 PM »

Hi,

I'm wondering how far the actual layout is from the modded layout ?

I receive my overtone today and I want to tweak a little bit the Overdrive channel which is a bit aggressive to my ears and taste.

There a little "peak" in upper frequencies or something that I can't describe with word that make the OD sound a little too bright / aggressive.
« Last Edit: July 04, 2008, 10:59:32 PM by Nathan » Logged
Nathan
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« Reply #91 on: July 07, 2008, 05:13:57 PM »

Nobody  Embarrassed Embarrassed ?
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bluesfendermanblues
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« Reply #92 on: July 07, 2008, 06:18:01 PM »

Turn down the overdrive trim pot to around 09:00 o'clock - looking towards the powersupply from the input side. That'll do it
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Nathan
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« Reply #93 on: July 10, 2008, 05:14:07 PM »

Turn down the overdrive trim pot to around 09:00 o'clock - looking towards the powersupply from the input side. That'll do it

That don't change my problem, even after turn down the OD trim it's still too trebbly / agressive for my taste. (I'm using old 12-65 in an old marshall 4x12 cabinet, not a trebbly speaker !)

I think I need some "tweaks" but I don't know which ones ! I mainly play strats, and I want to get close to that sort of liquid / sweet tone that John Mayer can obtains but I'm pretty far away !



I know that a 1k$ amp can't do what does a 3k$ amp but I'm sure that with few tweaks I can get closer to that sound.
« Last Edit: July 10, 2008, 05:38:00 PM by Nathan » Logged
bluesfendermanblues
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« Reply #94 on: July 10, 2008, 08:10:00 PM »

This is part of a post reply, regarding har to get a great Fenderlike clean sound and great dumblelike OD from the same knob/switch settings.......

I've experimented a lot with my Overtone to resolve this puzzle and have arrived at the following modifications to give me both good (sort of fender) clean sounds and at the same time nice rounded OD tones:

- a 47pf on the (input) volume
- change the bright cap to 47 pf
- a 39pf on the master volume
- increase the snubbers to 2 x 470pf (trims off OD harchness)
- add a 2nf+470k trimmer across the OD ratio (od master vol), which lets you reduce the OD treble (ditto)
- maybe add a 4,7M resistor and a 47nF capacitor to the input of the OD, just before the 220k
(trims off a little bottom fuzziness)
And use the following settings with a strat or tele:
Volume 7, bright off, mid off, rock on, treble 5, mid 5, bass 5, gain level 7, ratio 5, master any, prec 6,

And the following with a Les Paul
Volume 4, bright on, mid off, rock on, treble 6, mid 5, bass 4, gain level 5, ratio 5, master any, prec 7,

As I've said, you'll get both excellent cleans and very nice OD
- off course you have to adjust some of the od treble off on the cap/trim mounting on OD ratio control
- If the bottom end of the sounds gets too fuzzy in OD mode, you might add the Gill Ayan mod to the OD channel, which is adding a 4,7M resistor and a 47nF capacitor to the input of the OD, just before the 220k.

I use either a single 1x12" Celestion 12G65 or a 2x12" Celestion both with oval hole in the back.

Just remember that John Mayer uses, Overdrive pedals as well as using a TwoRock;
- Boss Blues Drive
- Tube screamer
- etc.

Good luck

By the way, great clip with John Mayer
« Last Edit: July 10, 2008, 08:15:13 PM by bluesfendermanblues » Logged

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Pickmaster
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« Reply #95 on: July 11, 2008, 04:39:34 PM »

Sorry if it sounds funy but I can do this with $300 transistor amp!

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Nathan
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« Reply #96 on: July 11, 2008, 05:47:36 PM »

Sound is before everything in the fingers we all know that Wink
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bluesfendermanblues
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« Reply #97 on: July 11, 2008, 07:02:52 PM »

Sorry if it sounds funy but I can do this with $300 transistor amp!



I like the blue reflections from the stage lightning on your guitar........... Wink
just kidding, you're a great articulate player 
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Pickmaster
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« Reply #98 on: July 11, 2008, 09:22:54 PM »

Thanks my friend,
It was just ordinary pub gig Wink
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ic-racer
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« Reply #99 on: July 11, 2008, 09:41:55 PM »

Listening to that JM video that was posted, it reminded me a little of a clip from one of my amps:

http://soundclick.com/share?songid=6706810

This is a Fender converted over to a Dumble circuit, similar to the overtone. Differences that contribute to the tone are as follows:

100k plate on V1 with 1.5k on cathode
220k&150k and 3.3&2.2k on V2
V1 bypass caps are 500uf and 25uf (not a typo, five-hundred)
Big output transformer iron (six 6L6, 180w)
Real 'Deep' switch. (on recording I'm using Deep on the clean and OD& PAB for the drive. Amp also has a "MID BOOST" but I'm not using it on the recording)
270pf snubbers.
Except for the PI and output sections the rest of it would be similar to the "Tweaked Layout" values.

Anyway here is the schematic of the amp in my recording, in case you want to copy anything into your Overtone.


BTW this is NOT my amp from the "Special Overtone Project" thread. This amp I am discussing sounds better with a Strat than my other.

* Final Schematic.pdf (314 KB - downloaded 721 times.)
« Last Edit: July 11, 2008, 09:49:12 PM by ic-racer » Logged
Pickmaster
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« Reply #100 on: July 12, 2008, 12:15:46 PM »

Very nice! Lovely tone and great playing.
« Last Edit: July 16, 2008, 11:26:43 PM by Pickmaster » Logged

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bbblue
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« Reply #101 on: July 12, 2008, 03:46:10 PM »

- add a 2nf+470k trimmer across the OD ratio (od master vol), which lets you reduce the OD treble (ditto)

Hi everybody! I'm new here and like to say hello and thanks so far for helping and posting so much mods.
Just got an Overtone and an 18W TMB from Nik.
 I did not come to the 18W yet  Embarrassed.
The Overtone is ok, but as posted here, with my LP I have some aggressive highs and buzzing basses.
Can you please explain how to set this trimmer? The other mods ar clear and will be done right after this.
Thanks!
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ic-racer
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« Reply #102 on: July 13, 2008, 01:10:30 AM »

Schematic re-posted as a JPEG.


* Final Schematic.jpg (780.34 KB, 2016x1224 - viewed 6887 times.)
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Mike
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« Reply #103 on: July 13, 2008, 02:54:50 PM »

Hi Ic-racer

I like your song and sound
http://www.soundclick.com/player/single_player.cfm?songid=6664325&q=hi&newref=1

Did you do this with the amp as per super twin-dumble-mod-layout ? Any other effects ?  Huh?

Mike

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max
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« Reply #104 on: July 16, 2008, 11:04:53 PM »

I haven't posted much as my amp was being worked on, I thought it was broken but ended up being a bad tube in the power section. While it was there he said he could mod it a bit and I want to document those changes and put them up on the site to see what people have to say about them. I need a PDF of the layout as of say last February so I can edit it with the changes. Does anyone happen to have anything like that, or know where I can get one.  I am not so good with schematics or I would draw it out, so the layout is the only way I can do it.
Thanks to all, glad to be back
Burnie
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Music in all it\'s forms is universal..anywhere in the world you speak it and are understood..It is a beautiful thing
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