Sansamp GT2 with QUAD OPAMP

Original effects with schematics, layouts and instructions, freely contributed by members or found in publications. Cannot be used for commercial purposes without the consent of the owners of the copyright.
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angga yudistira
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Post by angga yudistira »

Sansamp GT2 with QUAD OPAMP

To download PDF layout, visit to http://www.4shared.com/zip/_HEX2qVice/S ... OPAMP.html PASSWORD archive please email to agn.angga@gmail.com
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gt22.jpg
gt21.jpg
GT2.jpg
Last edited by angga yudistira on 16 Mar 2014, 16:49, edited 3 times in total.

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copachino
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Post by copachino »

amazin layout, can you upload a sound clip?? its it verified??

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angga yudistira
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Post by angga yudistira »

Sound preview

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angga yudistira
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Post by angga yudistira »

copachino wrote:amazin layout, can you upload a sound clip?? its it verified??
Sound preview
:D :D :D

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copachino
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Post by copachino »

pretty good sounds, which are the selectors?? 3P6t??

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copachino
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Post by copachino »

the capacitor values are missing, also the transistor values

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Govmnt_Lacky
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Post by Govmnt_Lacky »

Interesting....

How were you able to overcome the fact that you really cannot acheive the right sounds for the different sims without using a JFET input op amp for U4? If memory serves me right, the original used rail-to-rail op amps (TLC2262??) for 3 of them and then a TL072 for the last one.

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The G
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Post by The G »

Govmnt_Lacky wrote:Interesting....

How were you able to overcome the fact that you really cannot acheive the right sounds for the different sims without using a JFET input op amp for U4? If memory serves me right, the original used rail-to-rail op amps (TLC2262??) for 3 of them and then a TL072 for the last one.
What do you mean? TL074 is a JFET input op amp. TL226x are LinCMOS op amps, but in this circuit the input impedance of either TL07x or TLC226x is more than enough.
The rail-to-rail capability is another story, still there are some that prefer TL07x.

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angga yudistira
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Post by angga yudistira »

copachino wrote:pretty good sounds, which are the selectors?? 3P6t??
Yes correct, i use rotary switch 3 pole 6 throw :applause: :applause:

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angga yudistira
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Post by angga yudistira »

copachino wrote:the capacitor values are missing, also the transistor values
Please review in shematic.. I do not have time to make a bomb list, but it was the same as that in www.tonepad.com
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SANSAMP GT2k.pdf
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Last edited by angga yudistira on 17 Mar 2014, 12:18, edited 1 time in total.

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angga yudistira
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Post by angga yudistira »

copachino wrote:Yes correct, i use rotary switch 3 pole 6 throw
Yes correct, i use rotary switch 3 pole 6 throw :applause: :applause: :applause:

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angga yudistira
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Post by angga yudistira »

Govmnt_Lacky wrote:Interesting....

How were you able to overcome the fact that you really cannot acheive the right sounds for the different sims without using a JFET input op amp for U4? If memory serves me right, the original used rail-to-rail op amps (TLC2262??) for 3 of them and then a TL072 for the last one.
I pray to god that could be..

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Govmnt_Lacky
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Post by Govmnt_Lacky »

ggedamed wrote: What do you mean? TL074 is a JFET input op amp. TL226x are LinCMOS op amps, but in this circuit the input impedance of either TL07x or TLC226x is more than enough.
The rail-to-rail capability is another story, still there are some that prefer TL07x.
What I mean is that, in the ORIGINAL GT2.... the op amps that were used were (1) TL072 and (3) TLC2262 op amps. I know that you can sub the 2262s for TL072s but, I have read several times that you lose a lot of the quality in the amp sims by doing so.

Furthermore...

I know that when I built this unit, I had to use the 2262s to get the right sound from the sims when they were selected. Hence.... my question! :thumbsup

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copachino
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Post by copachino »

as far as a remember, Francisco From tonepad used 4 tl072 for op amps, in this unit

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Aharon
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Post by Aharon »

The download is not straightforward.

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J0K3RX
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Post by J0K3RX »

This is a great layout made by Arzone Mashuri of HASNOE FX in Indonesia :thumbsup

I have not built it but I have heard many demos and it sounds fantastic!

2 different layouts in red..
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1.jpg
2.jpg
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copachino
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Post by copachino »

where are the layouts???

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Post by J0K3RX »

copachino wrote:where are the layouts???
PM... Check it. :wink:


I have seen this built by many different people and all were extremely happy with it! Not one non-working... Has been modded with 3 band EQ and noise gate. You will have to figure out the wiring from the pics or do a little tracing yourself.. I don't have the wiring daigs, sorry

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AAntonio
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Post by AAntonio »

can you give me the layout?
many thanks

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karter2000
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Post by karter2000 »

I'd be interested in the layouts as well! Thanks!

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