Vintage Simmons Drums (UK) Users Group

Hey everyone.
I just uploaded some pictures of the Simmons 20-85 card. This is the daughter card that 
allows the SDS 7 modules to access four different eproms. The different eproms are selected 
using the resonance control - which kind of sucks because it means you lose that control, 
but but being able to access the different eproms is awesome.
I do have one question, though... There's a variable resistor on the card that I have no idea 
what it does. Resonance control, perhaps?  Any help would be greatly appreciated.
Many Thanks.
Ed

Wow! I've heard about this card, but I never saw it before. If you need eproms, you can have a list and my sounds as mp3 first to get an idea. Then you can order the ones of your choice (or sample the mp3s into your Akai...;-). I have got a pretty big  collection of original simmons and many others, but: Not the original clap trap :-(.
For getting the mp3s and the list mail your real email address to buchnerelectronics@....
Regards
Michael

  ----- Original Message ----- 
  From: blacklodgeed 
  To: Simmons_Drums@yahoogroups.com 
  Sent: Friday, February 22, 2008 6:49 PM
  Subject: [Simmons Drums] Simmons 20-85 eprom expander card


  Hey everyone.
  I just uploaded some pictures of the Simmons 20-85 card. This is the daughter card that 
  allows the SDS 7 modules to access four different eproms. The different eproms are selected 
  using the resonance control - which kind of sucks because it means you lose that control, 
  but but being able to access the different eproms is awesome.
  I do have one question, though... There's a variable resistor on the card that I have no idea 
  what it does. Resonance control, perhaps? Any help would be greatly appreciated.
  Many Thanks.
  Ed



   

[Non-text portions of this message have been removed]

--- In Simmons_Drums@yahoogroups.com, "Michael Buchner" 
<buchnerelectronics@...> wrote:
>
> Wow! I've heard about this card, but I never saw it before. If you 
need eproms, you can have a list and my sounds as mp3 first to get an 
idea. Then you can order the ones of your choice (or sample the mp3s 
into your Akai...;-). I have got a pretty big  collection of original 
simmons and many others, but: Not the original clap trap :-(.
> For getting the mp3s and the list mail your real email address to 
buchnerelectronics@...
> Regards
> Michael
> 
>   ----- Original Message ----- 
>   From: blacklodgeed 
>   To: Simmons_Drums@yahoogroups.com 
>   Sent: Friday, February 22, 2008 6:49 PM
>   Subject: [Simmons Drums] Simmons 20-85 eprom expander card
> 
> 
>   Hey everyone.
>   I just uploaded some pictures of the Simmons 20-85 card. This is 
the daughter card that 
>   allows the SDS 7 modules to access four different eproms. The 
different eproms are selected 
>   using the resonance control - which kind of sucks because it 
means you lose that control, 
>   but but being able to access the different eproms is awesome.
>   I do have one question, though... There's a variable resistor on 
the card that I have no idea 
>   what it does. Resonance control, perhaps? Any help would be 
greatly appreciated.
>   Many Thanks.
>   Ed
> 
> 
> 
>    
> 
> [Non-text portions of this message have been removed]
>
So THAT'S what that card is called; the 20-85 card. I have read about 
the resonance being replaced with the prom select control when that 
daughter board is placed onto the original card. I remember asking 
about that four-prommed SDS7 card and what it did before in this 
group after I just saw one on eBay.

Thanks for telling me more about that.

Dean S. Rumsey

--- In Simmons_Drums@yahoogroups.com, "blacklodgeed" <edrose1@...> wrote:
>
> Hey everyone.
> I just uploaded some pictures of the Simmons 20-85 card. This is the
daughter card that 
> allows the SDS 7 modules to access four different eproms. The
different eproms are selected 
> using the resonance control - which kind of sucks because it means
you lose that control, 
> but but being able to access the different eproms is awesome.
> I do have one question, though... There's a variable resistor on the
card that I have no idea 
> what it does. Resonance control, perhaps?  Any help would be greatly
appreciated.

I always thought that the lower two bits of the resonance control
became the ROM selects.

It's interesting to see that you've got an unpopulated card - can you
send me a pics of each side of the board in as high a resolution as
you can manage, off-list (or upload them somewhere I can grab them),
and a fairly high-res pic (enough to identify the chips) of the
populated board?

Gordon