Amptweaker - Tight Metal  [traced]

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Re: Amptweaker - Tight Metal

Postby gogovoivoda » 21 Jan 2015, 19:30

Wow ... what a thread. I read all 500 posts!!! Awesome work!!!

I just finished the TM and it sounds really GOOOOOD. Much better than all my commercial stomp boxes and anything I've ever diy-ed. It is brutal and yet natural both at lower volumes and cranked into a tube amp's return. There are a couple of things I wish to modify to my taste. Can anybody please help with advice and suggestions?

1. I don't like Noise Gate. Mine is wired to separate pot and seems to also lower the overall gain and distortion. It's audible even at low settings. The TM is actually quiet with a humbucker so I really don't need the gate that much. Just wondering if this is how it's supposed to work or is there something wrong with my parts or connections? Any links or suggestions for a mod that affects only the high frequencies?

2. Has anybody figured the exact purpose of the 1N4148 diode across V+ an V- of the first and third stages. Some posts suggest that they're for protection and others that they are for clipping. I'm asking because I generally do not like the way these sound as clippers and will consider getting rid of them.

3. The TM appears to distort more the lower frequencies and less the higher notes up the neck. This contributes to the more natural sound and to the fact that in open chords all notes are audible. I guess this is a result of the asymmetrical clipping of the zeners and the biasing of the clipping and the output stages. Is there a way to lessen this "effect" just a tiny bit so as to have more clipping at the higher notes . Should I try different zener values or experiment with the biasing of the clipping stages. What if I wired the output stage biasing with a trimmer. Will this enable me to "dial-in" different blends of the asymmetrically clipped negative and positive parts of the sine wave.

4. Has anybody tried a marshall type tone stack with the TM? Does it sound better? Any suggested values?

I will appreciate any advice and help! Thanks and cheers!

G.
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Re: Amptweaker - Tight Metal

Postby Nicht Bernd » 07 Mar 2015, 21:15

Build it with the error-pcb, have to change it. And put 18v on it... :D
Thanks Brejna
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Re: Amptweaker - Tight Metal

Postby brejna » 07 Apr 2015, 14:50

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Re: Amptweaker - Tight Metal

Postby DimebuGG » 22 Apr 2015, 13:13

Better late than never. :D Board is according to 125B type enclosures but this will fit also in 1590B/1290NS housing. Omitted the loops section though. And BTW, this layout uses 3 dual opamps. Enjoy!.
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Re: Amptweaker - Tight Metal

Postby J0K3RX » 23 Apr 2015, 04:25

DimebuGG wrote:Better late than never. :D Board is according to 125B type enclosures but this will fit also in 1590B/1290NS housing. Omitted the loops section though. And BTW, this layout uses 3 dual opamps. Enjoy!.


I downloaded the pdf but it won't open for me... seems corrupt? :cry:
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Re: Amptweaker - Tight Metal

Postby Blitz Krieg » 23 Apr 2015, 07:35

worked for me
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Re: Amptweaker - Tight Metal

Postby bajaman » 23 Apr 2015, 09:32

and me ;-)
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Re: Amptweaker - Tight Metal

Postby apollomusicservice » 23 Apr 2015, 10:32

I downloaded the pdf but it won't open for me... seems corrupt? :cry:[/quote]

Try this file.
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Re: Amptweaker - Tight Metal

Postby DimebuGG » 23 Apr 2015, 11:30

J0K3RX wrote:I downloaded the pdf but it won't open for me... seems corrupt? :cry:

Hmmm..that's odd..But hey, JOK3RX, I remember you asked me long time ago to do a smaller board layout on this circuit. Well, I hope this will do for you dude.. 8)

BTW, what's the correct values for R9 and R19?
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Re: Amptweaker - Tight Metal

Postby J0K3RX » 25 Apr 2015, 08:12

DimebuGG wrote:BTW, what's the correct values for R9 and R19?


R9 - 6.8k
R19 - 1.5k
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Re: Amptweaker - Tight Metal

Postby brejna » 30 May 2015, 12:15

What type of switch is used for pre/post loop positioning? 2p4t slide switch?
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Re: Amptweaker - Tight Metal

Postby J0K3RX » 30 May 2015, 14:22

brejna wrote:What type of switch is used for pre/post loop positioning? 2p4t slide switch?



The is the exact switch, manufacturer and all..
http://www.digikey.com/product-detail/e ... -ND/251342

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Re: Amptweaker - Tight Metal

Postby DimebuGG » 06 Jun 2015, 17:15

Built this using my layout. Aggressive heavy sharp/tight sound compared to your regular hi gain build which has a smooth/round tone. I'm using 9V supply only with two TLC2272 in the first and second stage and LF353 in the end(tried fitting a KIA4558 too which has I think a more mid-dy tone).
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Re: Amptweaker - Tight Metal

Postby greenskull » 08 Aug 2015, 23:29

Hey Dime! Just built this up using your layout and recommended chips...... kicks ass!
Didn't need the gate switch, because I decided to make the gate control external. Real glad you designed this for a 125-b, my favorite box.
Thanks for sharing your layout!
fuck smooth tone, fuck eric johnson - Seiche
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Re: Amptweaker - Tight Metal

Postby DimebuGG » 12 Aug 2015, 00:47

greenskull wrote:Hey Dime! Just built this up using your layout and recommended chips...... kicks ass!
Didn't need the gate switch, because I decided to make the gate control external. Real glad you designed this for a 125-b, my favorite box.
Thanks for sharing your layout!

:thumbsup Nice signature!..I love Eric though.. :D
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Re: Amptweaker - Tight Metal

Postby J0K3RX » 14 Aug 2015, 06:24

:twisted:
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Re: Amptweaker - Tight Metal

Postby Pruttelherrie » 14 Aug 2015, 11:41

I'll just leave this here :)

tightmetal-eagle.zip


Mostly based on/redrawn from Jok3rx's layout.
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Re: Amptweaker - Tight Metal

Postby J0K3RX » 17 Aug 2015, 07:15

Pruttelherrie wrote:I'll just leave this here :)

tightmetal-eagle.zip


Mostly based on/redrawn from Jok3rx's layout.


You mean kinda like this one? :twisted:

Don't know about smooth and round sounding :scratch: This one is pretty damn nasty! I had boards made from this one and it has even more balls than the real one I thought and played them side by side! There are little * signs on the components for the notch that make the difference between the TM and the TR. You can populate those with whatever you like...
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Re: Amptweaker - Tight Metal

Postby kreator777 » 28 Sep 2015, 15:45

Hello J0K3RX ,

Is there a schematic for Booster?
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amptweaker ?

Postby okgb » 07 Dec 2015, 05:17

sounds like a good guy other than working for peavey , curious anyone used or heard these pedals ?

http://tonereport.com/blogs/interviews/ ... amptweaker
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