Just fixed my Ibanez TS-808 pedal.

[Simon Barden]

If it's got a capture facility, you could use the scope on the foot switching line to see if you do get occasional spikes and how big they are. Although having had a closer look at the schematic, I feel it fairly unlikely that they would be anything serious. Plus there are two other 1000pf capacitors connected to the flip-flop circuit that would see the same voltage spikes (if any) and should be affected in the same way (unless these had higher voltage ratings).

I'm more of a mind to think that it was just a single duff capacitor.

[DrNomis_44]

If it's got a capture facility, you could use the scope on the foot switching line to see if you do get occasional spikes and how big they are. Although having had a closer look at the schematic, I feel it fairly unlikely that they would be anything serious. Plus there are two other 1000pf capacitors connected to the flip-flop circuit that would see the same voltage spikes (if any) and should be affected in the same way (unless these had higher voltage ratings).

I'm more of a mind to think that it was just a single duff capacitor.

I'm in the same frame of mind as you are about the duff cap, unfortunately my Oscilloscope doesn't have a capture facility, it's one of those old school analog CRT types I was able to buy before more expensive digital storage types became available, but, I really want to buy myself a new Digital Scope some time this year, Jaycar Electronics stock a 20Mhz Digital Scope that retails for something like Au$500.00 or so, they also stock a 100Mhz Digital Scope, but it's just over Au$1000.00.

One other thing I did was to replace the stock 100uF/16V Battery Bypass Cap with a new 330uF/16V one, it's not going to have any detrimental effects on the behavior of the TS-808 Circuit, it'll most likely improve the 9V supply rail filtering.