Mailist to discuss all issues regarding the Digitech GSP-2101 Guitar FX Processor

Hello guys,
this is my first day in this group, and I am glad to have found 
people who are sill working with the 2101.
Please don't laugh about my "small- talk- english" because I know- 
I'm not so goo in this language :-)
Ok! Here comes my first question:
But before I could tell it, I have to explain someting:
I have got two 2101, the first is a Nov'96 - Version (Artist, SV 
3.00.a , One-EPROM- Version)
the second is a Jul'94- Version (SV 3.00.00.a, Two- EPROM-Version)
I bought it sone month ago. And some month ago I found some 
interesting PPC210- Patches at the Internet, and I wanted to try 
them. So I tried to get a PPC210. But I did'nt, because it's out of 
production. I decidet to build 2 PPC210 by my own.
I have done that already. And they work fine. But there are some 
problems/questions: If I use a S-DISC-II for the PPC210, it only 
works at the Nov'96 - Version (there is a SMD- S-DISC II Processor in 
this GSP2101). At the Jul'94- Version (placed with a S-DISC I) it 
only causes big digital- noises like "chchfrsrchchfstchchfst....." 
added to the sound. If I put in a S-DISC-I- Processor, the PPC210's 
work good in both units. The known "cannon in echoplex- sound" 
appears in both cases. There is no error on my self- made PPC210, 
because with an original PPC210 (hired from a friend) the same effect 
occurs.
Now my questions: 
Does anybody know the differences between S-DISC-I and S-DISC-II?
Can anybody explain, why the S-DISC-I and S-DISC-II (on PPC210) can't 
be combined?
Randy Thorderson explained 
on "http://www.bstage.com/mail_archives/gsp-users/html/gsp-
users.9802/0117.html" that digitech will do a software-tweak to solve 
the cannon- problem. Did digitech really do that tweak?
Thanx for every help,
Dieter

Dieter,

Its been a while and my brain is a bit foggy, but I believe 
yes...they did....and that would be the v3 artist upgrade...which you 
definitely want to get if you can find it.  I would contact Digitech 
first and see if its still available from them.

Anyone else remember anything different?

cheers

-steve

--- In gsp-2101@y..., waechter.dieter@e... wrote:
> Hello guys,
> this is my first day in this group, and I am glad to have found 
> people who are sill working with the 2101.
> Please don't laugh about my "small- talk- english" because I know- 
> I'm not so goo in this language :-)
> Ok! Here comes my first question:
> But before I could tell it, I have to explain someting:
> I have got two 2101, the first is a Nov'96 - Version (Artist, SV 
> 3.00.a , One-EPROM- Version)
> the second is a Jul'94- Version (SV 3.00.00.a, Two- EPROM-Version)
> I bought it sone month ago. And some month ago I found some 
> interesting PPC210- Patches at the Internet, and I wanted to try 
> them. So I tried to get a PPC210. But I did'nt, because it's out of 
> production. I decidet to build 2 PPC210 by my own.
> I have done that already. And they work fine. But there are some 
> problems/questions: If I use a S-DISC-II for the PPC210, it only 
> works at the Nov'96 - Version (there is a SMD- S-DISC II Processor 
in 
> this GSP2101). At the Jul'94- Version (placed with a S-DISC I) it 
> only causes big digital- noises like "chchfrsrchchfstchchfst....." 
> added to the sound. If I put in a S-DISC-I- Processor, the PPC210's 
> work good in both units. The known "cannon in echoplex- sound" 
> appears in both cases. There is no error on my self- made PPC210, 
> because with an original PPC210 (hired from a friend) the same 
effect 
> occurs.
> Now my questions: 
> Does anybody know the differences between S-DISC-I and S-DISC-II?
> Can anybody explain, why the S-DISC-I and S-DISC-II (on PPC210) 
can't 
> be combined?
> Randy Thorderson explained 
> on "http://www.bstage.com/mail_archives/gsp-users/html/gsp-
> users.9802/0117.html" that digitech will do a software-tweak to 
solve 

> the cannon- problem. Did digitech really do that tweak?
> Thanx for every help,
> Dieter

Steve wrote:
> Its been a while and my brain is a bit foggy, but I believe
> yes...they did....and that would be the v3 artist upgrade...which you
......

Hmmmm... now I'm just a little bit confused, because I thought that the
Software- Version "3.00.a" is the latest Digitech shipped. Steve, is the "v3
artist upgrade" not the same as the Software- Version "3.00.a".
As I already wrote I use the Software- Version "3.00.a" in my
one-EPROM-Machine.
And in my old 2- EPROM- Machine I stored the "3.00.00" Software- Version to
the EPROMS (a simple copy of the original 3.00.00- EPROMS). And then I
changed the 10 MHz crystal into a 20 MHz, and also the capacitors into 15
pF. So, that I finally get the "3.00.00.a"- Software.

Steve wrote:
> .......... definitely want to get if you can find it.  I would contact
Digitech
> first and see if its still available from them.

You say "available". Do you mean, that once upon a time the software was
downloadable from the net?
Or did they only ship other EPROMs fore those, who has no EPROM- programmer.
But if it isn't availble from Digitech, it's no problem. I think someboby
does have this software, and if this one would send it to me, I will just
reprogram my EPROMs once again.

By the way, of course, I also changed the coil (L27) into an 10 Ohm-
reststor, to eliminate the boot- problem.

wew...way over my head.  I missed the part you said about having 3.0a.  Once
upon a time...we all bought 3.0a and it came to us as a chip replacement.
Unfortunately Digitech did not ever support the method you are doing...which
I must say is pretty impressive to say the least....if you get it all to
work properly.

Sorry for the confusion.

-steve

> -----Original Message-----
> From: Dieter Waechter [mailto:waechter.dieter@...]
> Sent: Thursday, March 29, 2001 10:40 PM
> To: gsp-2101@yahoogroups.com
> Subject: Re: [gsp-2101] Re: PPC210 and S-DISC-II
>
>
> Steve wrote:
> > Its been a while and my brain is a bit foggy, but I believe
> > yes...they did....and that would be the v3 artist
> upgrade...which you
> ......
>
> Hmmmm... now I'm just a little bit confused, because I
> thought that the
> Software- Version "3.00.a" is the latest Digitech shipped.
> Steve, is the "v3
> artist upgrade" not the same as the Software- Version "3.00.a".
> As I already wrote I use the Software- Version "3.00.a" in my
> one-EPROM-Machine.
> And in my old 2- EPROM- Machine I stored the "3.00.00"
> Software- Version to
> the EPROMS (a simple copy of the original 3.00.00- EPROMS). And then I
> changed the 10 MHz crystal into a 20 MHz, and also the
> capacitors into 15
> pF. So, that I finally get the "3.00.00.a"- Software.
>
> Steve wrote:
> > .......... definitely want to get if you can find it.  I
> would contact
> Digitech
> > first and see if its still available from them.
>
> You say "available". Do you mean, that once upon a time the
> software was
> downloadable from the net?
> Or did they only ship other EPROMs fore those, who has no
> EPROM- programmer.
> But if it isn't availble from Digitech, it's no problem. I
> think someboby
> does have this software, and if this one would send it to me,
> I will just
> reprogram my EPROMs once again.
>
> By the way, of course, I also changed the coil (L27) into an 10 Ohm-
> reststor, to eliminate the boot- problem.
>
>
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>

Steve wrote:

> wew...way over my head.  I missed the part you said about having 3.0a.
Once
> upon a time...we all bought 3.0a and it came to us as a chip replacement.
> Unfortunately Digitech did not ever support the method you are
doing...which
> I must say is pretty impressive to say the least....if you get it all to
> work properly.

It works fine!
But you mustn't only change the EPROMS. You  have to change the EPROMS (or
the Software), the crystal, the capacitors and the coil (to make it
perfect!).
Oh and not to forget.... a very important point is, to adjust the gain of
the preamp- section. Because the 2101-gains have changed over the years of
production. I think it's the potentiometer P9.
I normally set it to the Artist- gain- value.
And today- you have to build the PPC (because it's out of production)...
create the layout .... and so on...
If someone is interested I could post a hardware- "help your self" message

I think posting a HOW-TO document (with diagrams) would be extremely useful.

> -----Original Message-----
> From: Dieter Waechter [mailto:waechter.dieter@...]
> Sent: Friday, March 30, 2001 1:21 AM
> To: gsp-2101@yahoogroups.com
> Subject: Re: [gsp-2101] Re: PPC210 and S-DISC-II
> 
> 
> Steve wrote:
> 
> > wew...way over my head.  I missed the part you said about 
> having 3.0a.
> Once
> > upon a time...we all bought 3.0a and it came to us as a 
> chip replacement.
> > Unfortunately Digitech did not ever support the method you are
> doing...which
> > I must say is pretty impressive to say the least....if you 
> get it all to
> > work properly.
> 
> It works fine!
> But you mustn't only change the EPROMS. You  have to change 
> the EPROMS (or
> the Software), the crystal, the capacitors and the coil (to make it
> perfect!).
> Oh and not to forget.... a very important point is, to adjust 
> the gain of
> the preamp- section. Because the 2101-gains have changed over 
> the years of
> production. I think it's the potentiometer P9.
> I normally set it to the Artist- gain- value.
> And today- you have to build the PPC (because it's out of 
> production)...
> create the layout .... and so on...
> If someone is interested I could post a hardware- "help your 
> self" message
> 
> 
> 
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> 
> To unsubscribe from this group, send an email to:
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> 
>  
> 
> Your use of Yahoo! Groups is subject to 
> http://docs.yahoo.com/info/terms/ 
> 
>

could you send me the "help your self" message about gsp 2101? i'm 
from indonesia, and it's difficult to have some customer service 
here...