Harbinger speed question

[Matt]

Is their a way to change the range of the speed knob on the Harbinger?

[midwayfair]

Yes.






Seriously, what are you looking to change? Overall faster? Overall slower? Different taper? You can't expand the range too much (the oscillator has an upper and lower bound), but I can at least tell you how to go about finding the exact maximum range you can get.

[Matt]

Yes.






Seriously, what are you looking to change? Overall faster? Overall slower? Different taper? You can't expand the range too much (the oscillator has an upper and lower bound), but I can at least tell you how to go about finding the exact maximum range you can get.

Damn that was a quick reply!  I am trying to get some slower speeds out of it.  I put a second set of caps on a switch for a phase shifting mode.

Actually, if its not too much trouble can you tell me how to get it to sweep faster as well?

Thanks in advance!

[Matt]

Ok, so I read the geofex article "technology of a univibe" and read that the 2 220k resistors limit the slow side and the 2 4.7k resistors limit the fast side.  Does anyone know what I can safely change these values to?