Vintage Simmons Drums (UK) Users Group

Thanks, Michael

I would like to do so, but I need to find a spare tom card... any ideas?

The pedal that I have purchased on e-bay has the 1/4" out. 

http://cgi.ebay.com/SIMMONS-DRUMS-SDSV-SDS7-HI-HAT-CONTROLER-
PEDAL_W0QQitemZ7412672988QQcategoryZ38069QQrdZ1QQcmdZViewItem

Do you recognize it? Someone thought it may be from the SDX kit. Do you think it would 
work with SDS-7 with a TRS-XLR cable?

Any advice would be appreciated,
Pigletdad

--- In Simmons_Drums@yahoogroups.com, <michael.buchner@...> wrote:
>
> Hi Pigletdad40,
> if you have a tomcard, it's possible to convert it into a hihat. There are
> some empty gaps on the drumboard (card) which must be filled with some
> additional resistors, capacitors and diodes. There is only one eprom
> responsible for both open and close sounds, the pedal regulates decay of the
> vca and triggers also the env generators. The SDS's HH is, by the way, one
> of the best playable and sounding HH's available. Open, close, half, chick,
> stomp, splash, very nice. Invented 20 years ago...
> 
> The SDS5/SDS7 pedal itself is constructed around an infrared interrupt
> switch, a H21A1 (Google around for details). It is definately not possible
> to use other pedals without modification. The Hihat XLR of theSDS7 outputs
> 15V on its Pin 3. There is Gnd on Pin 1. And Pin 2 is the input of the HH
> control-voltage. Using switch-pedals will result in shortcut of the SDS7
> brain.
> 
> To increase sampling time, you can modify your new HH-card to 64K and
> download the long HH eprom from www.simmonsmuseum.com.
> 
> So, if you made your decision to convert a card, I'll give you all details.
> Michael
>