I am building a new x0xb0x using kit from x0xsh0p and at the moment I am building VCO. I measured the sawtooth with oscilloscope and it looked fine. I then continued the build it, but when I measured square wave, it didn't look similar than the picture on building instructions (http://www.ladyada.net/make/x0xb0x/fab/vco.html) and the voltages were also different:
The instructions say that that the Vpp should be about 4 volts, but I get about 13Vpp. What could be the cause for the difference? And should I first try to solve it, until I continue constructing the kit any further?