Vintage Simmons Drums (UK) Users Group

Hi list,

It sounds like I now can take a closer look at my hihat module (or was 
it the cymbal?) that is a bit trial and error-ish when it comes to 
selecting presets. I haven't bothered this far...

-- 
electronically yours, jesper

- -- --- ---- ----- ---- --- -- -
www.electronic-obsession.se
www.myspace.com/machinepop


ttete500 skrev:
>  
> 
> Hello all and hello to my friend Michael!
> 
> Yes Michael is rigth,on the SDS5 sound selector is missing a pull down 
> resistor at the clocks input pin 3 and 11 (they are tied together ) of 
> the 4013 dual flipflop.And I wonder how it was working without (CMOS 
> input should not stay no polarised like you could with TTL input that 
> have built in pull up resistor).
> I have to put these resistors on my SDS5 that have trouble changing 
> preset (but perhaps the push buttons contacts are also dirty???)
> Michael,you have really good improvment with TL084 instead of LM324???
> I know that TL074 have a really better slew rate than LM324...
> I will try....
> See you soon all
> Thierry EPPHERRE from France
> 
> --- In Simmons_Drums@yahoogroups.com 
> <mailto:Simmons_Drums%40yahoogroups.com>, "Michael Buchner" 
> <buchnerelectronics@...> wrote:
>  >
>  > Hi and congratulations Aaron, you new SDSV owner!
>  > I don't know how deep you are into electronics, but you can print 
> this answer on a piece of paper and take it to a tech at your hometown, 
> he should understand.
>  > After checking the mechanical items like the correct function of the 
> select buttons and the right supply voltages 15/-15V, go on like this:
>  > The sound selector circuit is one 4013, one 4556, one 4011 and three 
> 4016 easy to locate on the PCB of each module near the front panel. 
> Check the 4013 and the 4556 first. If you don't get 4556, get 4555 and 
> remove and shortcut the inverter 4011. Now the most important point: The 
> 4013 (double flipflop) available TODAY are different to the 4013 
> available in the past when your beast was built. If you exchange the 
> 4013, this will happen: In the moment you press a preset button, the 
> right preset will show up, but vanishes if you let the button go. These 
> new 4013 don't "hold" the preset for some reason. But don't worry: 
> Solder a 100k resistor between pin 11 of the 4013 and GND and it will 
> work fine. May be someone changed the 4013 earlier and did not know this 
> magic trick?
>  > And if your tech is "into" your SDSV, let him change the quad OPamps 
> in the rack responsible for final output amplification. It should be two 
> 324 fitted as original. Replace it by some TL74 or TL84 and the sun will 
> shine...
>  >
>  > Best wishes and good luck
>  > Michael
>  >
>  >
>  >
>  > ----- Original Message -----
>  > From: the_green_dome
>  > To: Simmons_Drums@yahoogroups.com 
> <mailto:Simmons_Drums%40yahoogroups.com>
>  > Sent: Saturday, October 10, 2009 4:47 PM
>  > Subject: [Simmons Drums] SDSV - presets only
>  >
>  >
>  > Hi
>  >
>  > I've got an SDSV !!!!!
>  >
>  > It's seen some action in its long life. The outer case looks very 
> battered. It's the standard bass / snare / 3 x toms (no cymbal, no hihat!).
>  >
>  > The problem I have with it is that I can only use the factory 
> presets. On the bass, snare, tom 1 and tom 2, I cannot even select any 
> of the other three "channels" for each module. For tom 3, I can select 
> the others, but as soon as I hit the pad and trigger the sound, it 
> reverts to the preset channel. (The non-preset channels all work on tom 
> 3 - and I can get some amazing sounds out of it - but only if I hold one 
> of the four buttons in - bad for my drumming technique...).
>  >
>  > Has anybody come across this problems before - or have any ideas how 
> I could fix this?
>  >
>  > By the way - the presets may not be cool, but wow they sound 
> incredible. So much depth to the noise being made. I'm triggering them 
> from some SDS-800 (mk 3, mk 4?) pads via the Synth In jacks - thought I 
> might have difficulty, but with the sensitivity turned up, the SDSV is 
> triggering perfectly.
>  >
>  > Thanks in advance for any advice you can offer.
>  >
>  > Aaron