[sdiy] technics 1200 - backwards

[Doug Terrebonne]

I guess what would be cool would be to wire up a switch to select normal 10%
range and extended range... Anyone done that?

Doug

--- mark verbos <a0284520 at addcom.de> wrote:
> yeah you open up the case and turn up the range trimpot.
> 
> ;)
> 
> it's under the platter.
> 
> people do that one all the time, but then it becomes really hard to mix 
> on them, because the slide is too sensitive.
> 
> mark
> 
> Doug Terrebonne wrote:
> 
> >Is there a mod to increase the range of the pitch control? Something like
> +/-
> >50% would be great!
> >
> >Doug
> >
> >--- Atom 'Smasher' <atom at suspicious.org> wrote:
> >
> >>cross-posted
> >>
> >>this has been asked on the circuit-benders list, but i think it's of
> >>interest to the DH and DIY crowd as well.
> >>
> >>this was tested on an SL-1200mkII, but should work the same on the
> >>SL-1200mk3 and the 1210 (black) versions, too.
> >>
> >>to make a 1200 spin backwards, remove the cover, underneath the
> >>platter: find IC101 (AN6675) which has a heat-sink on top of it.
> >>
> >>wire up pin #8, through a SPST switch, to ground. (a good ground happens
> >>to be the jumper, next to pins 12-13 of IC101)
> >>
> >>if the switch is open, the platter spins forward, as normal. if the switch
> >>is closed (and pin #8 is grounded), the platter spins backwards.
> >>
> >>where you put the switch is your problem.... it looks like there is a good
> >>spot between the pitch-fader and the platter. i'm gonna use a panel-mount
> >>push-button switch that mounts in a round hole. if you come up with
> >>something better, let us know. make sure you remove the HARD plastic
> >>bottom from the metal upper-housing, and locate a cavity BEFORE you drill
> >>a hole in the upper-housing.
> >>
> >>i was thinking that it'd be cool to use an LED lighted switch, to indicate
> >>that the platter is in reverse mode, but the shorted-circuit (on the deck
> >>i tested this on) only pulls 0.28 mA, not nearly enough to light up an LED
> >>by itself. if someone is really motivated, they can use a DPST lighted
> >>switch (and wire up an LED), so one of the poles controls an LED.
> >>
> >>
> >>        ...atom
> >>
> >
> >
> >=====
> >BigFoot Recording Studios
> >40-Track Facility
> >Fremont, CA
> >www.bigfootstudio.com
> >
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> 
> 


=====
BigFoot Recording Studios
40-Track Facility
Fremont, CA
www.bigfootstudio.com

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