AMT - Legend Amp Series 2  [traced]

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Re: AMT - Legend Amp Series 2

Postby Ice-9 » 01 Oct 2015, 22:28

ggedamed wrote:You're not talking about the thing that Burgs does with his left hand index, are you?
Hope you don't mind me insisting on this :cheers, the sound artifacts are really difficult to explain or even point to.


Well spotted, the little vibrato hammer type of thing he does, also at the 5.05 mark toggling of the pickup switch and it also looks like just before that he may just catch the vol knob.
It's fairly straight forward, if you want to start it , press start. You can work out the rest of the controls for yourself !

No silicon heaven ? preposterous ! Where would all the calculators go ?
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Re: AMT - Legend Amp Series 2

Postby phatt » 02 Oct 2015, 15:05

I don't mind if you insist,,, all good. :thumbsup
Between 5:03 and 5:04 there is a fast flurry of notes and there is a lot of mud (maybe the term is inter-modulation)

The P2 is even more pronounced
https://www.youtube.com/watch?v=9CLi4gA_b4M
At 0:43 it spits for a split second on a bend up and again at 0:47 another fast riff,, spatters badly.

Just sayin,,That would bug me. :x
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Re: AMT - Legend Amp Series 2

Postby Nicht Bernd » 15 Oct 2015, 10:47

The pcb is far too big for a 1590BB. What kind of box do I need?
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Re: AMT - Legend Amp Series 2

Postby DimebuGG » 24 Oct 2015, 00:14

I made a through hole pcb of this for 1590BB type enclosure. Although it's already done, I need to take a look at it again before posting. 8)

What will be the necessary adjustments if 18-24V will be used to power this circuit?.
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Re: AMT - Legend Amp Series 2

Postby phatt » 24 Oct 2015, 08:57

DimebuGG wrote:What will be the necessary adjustments if 18-24V will be used to power this circuit?.


I'd guess,,,,,,,,,a complete redesign. :blackeye Which will likely achieve very little benefit.
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Re: AMT - Legend Amp Series 2

Postby bajaman » 24 Oct 2015, 09:05

they were designed for 9v dc - phatt is spot on with his comment - use the correct voltage for the correct response
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Re: AMT - Legend Amp Series 2

Postby J0K3RX » 24 Oct 2015, 10:52

I think they can use up to 12V... I wouldn't go a hair over +300VDC but, it might be fun to watch somebody else try! :twisted:
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Re: AMT - Legend Amp Series 2

Postby DimebuGG » 24 Oct 2015, 11:14

J0K3RX wrote: I wouldn't go a hair over +300VDC but, it might be fun to watch somebody else try! :twisted:


Oh yeah, will definitely try that.. :wink:
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Re: AMT - Legend Amp Series 2

Postby Ice-9 » 24 Oct 2015, 18:32

Yeah.. I says 9-12v on the tin, and they sound bloody good so no point I changing the voltage.
It's fairly straight forward, if you want to start it , press start. You can work out the rest of the controls for yourself !

No silicon heaven ? preposterous ! Where would all the calculators go ?
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Re: AMT - Legend Amp Series 2

Postby DimebuGG » 26 Oct 2015, 01:44

Here it is..

Thanks to bajaman for allowing me to attach his schematic. :applause:
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Re: AMT - Legend Amp Series 2

Postby J0K3RX » 26 Oct 2015, 19:13

DimebuGG wrote:Here it is..


Damn!! That is some crazy trace work!! Nice job!
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Re: AMT - Legend Amp Series 2

Postby J0K3RX » 18 Oct 2016, 17:47

Found these in the "guitar-gear.ru" forum.. posted by forum member mrubanoff :wink:
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Re: AMT - Legend Amp Series 2

Postby Ice-9 » 19 Oct 2016, 20:58

J0K3RX wrote:Found these in the "guitar-gear.ru" forum.. posted by forum member mrubanoff :wink:


I haven't had time to compare these against the traces me and Bajaman made, have you spotted any differences ? :popcorn:
It's fairly straight forward, if you want to start it , press start. You can work out the rest of the controls for yourself !

No silicon heaven ? preposterous ! Where would all the calculators go ?
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Re: AMT - Legend Amp Series 2

Postby J0K3RX » 21 Oct 2016, 00:56

Ice-9 wrote:
J0K3RX wrote:Found these in the "guitar-gear.ru" forum.. posted by forum member mrubanoff :wink:


I haven't had time to compare these against the traces me and Bajaman made, have you spotted any differences ? :popcorn:


Nope, just stumbled across them while looking at other stuff and though :hmmm: better grab these before they disappear into the abyss.. Funny though because I think mrubanoff was explaining a problem with the P1 and asking for help to find a resolution but, I could be wrong..? The translation was horrible at best.. Klingon language would probably have made more sense :scratch:

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Re: AMT - Legend Amp Series 2

Postby orcl2 » 12 Jun 2017, 02:33

Hi folks! Someone had tested this schem?
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Re: AMT - Legend Amp Series 2

Postby masramdhani » 12 Jun 2017, 10:15

Thanks bajaman for your schematic.

I made a E2 clone based on your schematic. I use it as a preamp pedal, so i'm not building the drive and the cabsim out. In my country, 2sk208 and 2sk30R is quite rare, so i'm using only 2N5458, J201, and J177. By changing the JFET,re-adjustment of the resistor value for the amplifier stage is needed. I use 1 10k multiturn trimpot to solve those problem especially on the drain resistor. So far the sounds is acceptable. But, i hear a slight of "fart" when the sounds fade out. Still working on it.

Anyway thanks guys :thumbsup :thumbsup :thumbsup
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Re: AMT - Legend Amp Series 2

Postby Statzern » 27 Aug 2017, 14:24

DimebuGG wrote:Here it is..

Thanks to bajaman for allowing me to attach his schematic. :applause:


Has anyone built this yet? I have the AMT E2 which I love and would love to build just the high gain sections for preamps, but this PCB is big! Would even fit in a 1590BB? Looks like barely from the measurements.
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Re: AMT - Legend Amp Series 2

Postby POTL » 15 Oct 2017, 06:36

I correctly understand that the p-channel Jfet(T5/T7/T9) for the offset of the n-channel Jfet(T4/T6/T8) but does not affect the sound?
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