[sdiy] technics 1200 - backwards

[Doug Terrebonne]

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

__________________________________________________
Do You Yahoo!?
Yahoo! Tax Center - online filing with TurboTax
http://taxes.yahoo.com/