Isn't that interesting

[MmmPedals]

I got my hands on a cbs arbiter doubler (borrowed on condition not to share pics, sorry) and i am attempting to clone it. [just as a note i replaced the original bc173 transistors with 2n5088, there are diodes i have not identified (see thread name those diodes) and there are these large white box caps that i assume i can just use regular film caps]
the circuit as i have it now passes a very weak signal with no effect so i decided to probe mine and compare it to the original. Now here is the interesting part (at least to me) there was already fuzz even before the input cap!?!

[MmmPedals]

Anyone know why this happens?

[Top Top]

You are saying there is fuzz on the input lug?

That would mean either you are feeding it a fuzzed signal, or whatever you are plugging it into is fuzzing.

[panterafanatic]

Is your jack screwed up? Cable?

[MmmPedals]

YES i even probed the cable tip when it was plugged into the pedal and the signal was fuzzed
Im gonna try this again because im doubting what i know i heard.

[MmmPedals]

  I probed it again (the original pedal which works fine) and yeah, there's fuzz at the input it like an unbiased fuzz (unlike the output which it big and full) but a fuzz none the less.

[PRR]

If the input impedance is low and inconsistent, and the source is not infinitely powerful, sure it will be distorted at the "input" jack.

Wire a 6VAC transformer with a 1K resistor in series. Feed your oscilloscope (high consistent impedance), you get a pure sine wave (or as pure as your utility and household loads make it). Put a 1N4007 diode across the 'scope, you get nearly half-waves, which is a horrible distortion of that sine.

Your guitar (or other source) has significant impedance. And it is obviously likely the fuzzer has a "diode", even if it is a transistor junction. Many simple pedals also have a 68K resistor and small cap in front of the "diode", which will reduce the distortion seen at the input. Maybe this doesn't.

[caress]

just post some pics... people would be able to help you out MUCH easier than playing guessing games