ehx stereo pulsar rate knob mod

[big muff cabbage]

I like my ehx stereo pulsar, but the rate knob is unusable.  The rate has a narrow usable range from 8 o'clock to 10 o'clock.  Does anyone know of a mod to slow down the rate, either with a slow/fast switch or some other method?  I only need to LFO to go from 0 to 240 bpm (4 cycles/second).  Thanks.

[armdnrdy]

If you want the LFO to go to 0......either unplug the power supply or take the battery out. 

LFOs can't go to zero. It would no longer be an oscillator if it did!

If the schematics were available we could help with slowing down the LFO rate by pointing the way to the "rate" capacitor.

Maybe post some gut shots of the trace and component side of the circuit board then we can help.

[Earthscum]

If the rate knob is just a normal pot being used as a variable resistor, you could strap a resistor across the 2 lugs to change the overall resistance.

If, for instance, lugs 1 and 2 are used and 3 is tied into 2, or unused, measure the resistance across the 2 lugs. Let's say at 10 o'clock it measures 8k and it's an audio taper 100k pot. you could then strap a 10k resistor across the 2 lugs, and the overall resistance would then be just over 9k (paralleled 100k and 10k = 9.09k). That should widen it out to get you into "your" useable range from about 8 o'clock all the way to about 4-5 o'clock.

[big muff cabbage]

sorry for the really late reply.  The pot appears to be a 1 KOhm linear pot.  That means I need to wire a 100 Ohm resistor, right?  I am a little confused how to tell which lugs to solder the resistor to, because I can only see the back of the circuit board.  When the pot is fully counter-clockwise, should I be reading ~ 0 Ohms or 1 KOhm across lugs 1-2?  Thanks again.