Hi mneary,
Sorry it was a spelling error i should have written 200mV.
Hi audioguru,
The coupling capacitor is in place, i understand it's almost impossible to give advise without viewing the circuit but this is really something that i may be able to use to make some money & at my age it could be a start into something i really enjoy doing.
I placed the circuit into a small aluminium box yesterday & took it to a local music shop where they connected a very cheap guitar into it.
They were astonished at the sound, so much so they said if i can sort it out they would certainly purchase some foot pedals of me if i can put them together.
The sound is very much like a big tube amp but from a transistorised amp & makes the guitars sound very similar to how Carlos Santana has his equipment setup but at a small fraction of the cost. I am very excited about it all but i still have the same issue as mentioned.
I have a couple of questions i need some help with.
The circuit only works as mentioned at two positions on the volume control pot on the guitar.
So, i guess it is only working at two specific voltage levels, the voltage at the two positions on the control pot it is working at. Or is it the Current levels?
Is it possible that i could just set the volume control pot on the guitar to full--10 & then have a set value resistor in series on the input to the circuit so it will simulate the position on the volume control pot where the circuit works.
This way when the foot pedal is in use it's just a matter of settng the control pot to full & the volume can be set out of the foot pedal circuit.
Then again thinking about it not all guitars will have the same output from the pickups as i have so a set value into the circuit may not work for all??
If i could just get it to work just at a set level for the run of the mill guitar pickup outputs it would be great.
More questions,
What is a safe level regarding voltage & amps that i should restrict the output of this circuit at for use in transistor amps & also for use in tube amps. I am unsure what the safe limits are.
What is the average input impedance of the run of the mill tube amps.
I do need to check the input & output current but i am still unsure how to achieve this using my oscilloscope, i purchased a large .01m resistor yesterday as well to try to get some amperage values but i am unsure about how to achieve this, some advice would be really helpful. I have read a lot but i still don't quite get it?
Is there a basic variable frequency sinewave oscillator circuit on the net somewhere that would be suitable for testing this circuit, i may be able to find out more if i could simulate the pickup output with it connected to my circuit.
The output needs to be adjustable as well in the range of the guitar pickups output.
Thank You