ISP - Decimator

analogguru · Post by **analogguru** » 26 Oct 2007, 19:02

Here is the patent for the ISP Decimator:
ISP Decimator (patent)

Here:
http://musiciansboutique.com/ebay/isptech/gwart800a.jpg
you can read that ISP was founded by former Rocktron employee Bruck (James K.) Waller.

If somebody has more infos please post here. Guts, schematics etc. would be intersting.

analogguru

Koltun · Post by **Koltun** » 26 Oct 2007, 19:08

I'm waiting for big brother - rack version of Decimator.

alteredsounds · Post by **alteredsounds** » 26 Oct 2007, 21:24

I'll put some gut shots up when I unpack my gear

tuemmueh · Post by **tuemmueh** » 26 Oct 2007, 22:42

hey ag,

great to see back here! Hope you're fine ...

I just wanted to say: I'm highly interested in this circuit! Always thought it would be DSP ...

Cheers ~Timm

tuemmueh · Post by **tuemmueh** » 14 Nov 2007, 23:30

Any news on this topic?

alteredsounds · Post by **alteredsounds** » 15 Nov 2007, 10:52

My boards are still packed up from shows, soon as i get a chance i'll get on the case.

Supafuzz · Post by **Supafuzz** » 07 Feb 2008, 11:28

First go to ISP website isptechnologies and get the file DECIMATORTECHNOLOGYPRIMER.pdf

Then go to thatcorp website and read the application notes on compressors, expanders and gates.

Follow with reading on National Semiconductor DNRS (Dynamic Noise Reduction System) chips from 1970/80s

Afterwards it's a medium difficulty task to design your own.

alteredsounds · Post by **alteredsounds** » 07 Feb 2008, 11:42

I'm pretty sure the isp is smd, i'll try and remember to open it after rehearsal tonight. Certainly the best gate I've ever used.

Stephengiles · Post by **Stephengiles** » 08 Feb 2008, 15:33

Have you seen the Drawmer DF320 circuit? It's a monster which used 2 x SSM 2120 and a DBX 2150, but a superb single ended noise filter/downward expander. let me know if you want me to post it.

alteredsounds · Post by **alteredsounds** » 09 Feb 2008, 11:06

Ok the Decimator isnt smd, thought I remembered it was for some reason.

It contains:

6 x LF33N
1 x MC14013BCP (IC FLIP FLOP DUAL CMOS 14DIP)
1 x 21811c

and a couple transistors I cant read at the moment.

I will do gut shots IF I can safely get it apart but this is one of those pedals that is actually so good for the price, that it deserves to be bought. I would also think it is a hard build.

Stephengiles · Post by **Stephengiles** » 17 Feb 2008, 08:27

kugua wrote:oh it's a best message.please show to us.thanks

Here it is

http://www.4shared.com/file/38068229/ee ... DF320.html

Kaos · Post by **Kaos** » 17 Feb 2008, 15:08

Supafuzz wrote:First go to ISP website isptechnologies and get the file DECIMATORTECHNOLOGYPRIMER.pdf

Then go to thatcorp website and read the application notes on compressors, expanders and gates.

Follow with reading on National Semiconductor DNRS (Dynamic Noise Reduction System) chips from 1970/80s

Afterwards it's a medium difficulty task to design your own.

*linkylinkylink*

ISP

http://www.isptechnologies.com/DECIMATO ... PRIMER.pdf

thatcorp

http://www.thatcorp.com/appnotes.html

National Application Notes

http://www.national.com/an/AN/AN-384.pdf#page=2

http://www.national.com/an/AN/AN-386.pdf#page=1

http://www.national.com/an/AN/AN-390.pdf#page=1

National Datasheets

http://www.national.com/ds/LM/LM832.pdf#page=1

http://www.national.com/ds/LM/LM1894.pdf#page=1

Supafuzz · Post by **Supafuzz** » 17 Feb 2008, 16:10

Kaos wrote:
*linkylinkylink*

Since I had <5 posts when I posted I was not allowed to include links.
This is post 5 so from now on there'll be links when required.

Stephengiles · Post by **Stephengiles** » 17 Feb 2008, 22:01

Stephengiles wrote:
kugua wrote:oh it's a best message.please show to us.thanks

Here it is

http://www.4shared.com/file/38068229/ee ... DF320.html

This is no doubt way way above the heads of the fuzzers!

bajaman · Post by **bajaman** » 17 Feb 2008, 22:15

This is no doubt way way above the heads of the fuzzers!

now now stephen - don't be so judgemental

- thanks for the link, interesting schematic

cheers
bajaman

alteredsounds · Post by **alteredsounds** » 31 Mar 2008, 16:16

I'm more than happy having paid for mine, its one of the best out there and a good price. Cant see the need to clone it.

oscarv77 · Post by **oscarv77** » 31 Mar 2008, 20:00

I might have missed something, but is the ISP decimator the same as schem that Stephen posted? If it is, I'd be willing to do a PCB layout for it.

soulsonic · Post by **soulsonic** » 31 Mar 2008, 22:09

oscarv77 wrote:I might have missed something, but is the ISP decimator the same as schem that Stephen posted? If it is, I'd be willing to do a PCB layout for it.

Stephen posted a Drawmer downward expander thing that works on a similar principal.

oscarv77 · Post by **oscarv77** » 01 Apr 2008, 02:32

soulsonic wrote:
oscarv77 wrote:I might have missed something, but is the ISP decimator the same as schem that Stephen posted? If it is, I'd be willing to do a PCB layout for it.
Stephen posted a Drawmer downward expander thing that works on a similar principal.

Ah... gotcha

ech0es · Post by **ech0es** » 04 Jul 2008, 14:28

guts shot!

ISP - Decimator [traced]