guest wrote:if you retune it
does it stay in tune after that
does your kit have the r100 thermistors in it
can you bring it back into tune
with the tune knob on the front
Some does and some doesn't.
The one which can be retune, I can easily tune the TM4 back to the right tune(or tune knob at the front). It is weird. I have not touch the x0xb0x at all after the carlibration. Next day woke up in the morning and use a tuner to test the C1 C2 C3 C4, they either goes one note higher or lower. It becomes D1 D2 D3 D4. I know the themistor is sensative to temperature, but it affect the note that much?
However, this is not the worse case. I have some x0xb0x goes out of tune and I am not able to put it back to the right tune. It is very strange. It was 100% working and carlibrate without any problem after I finish all the soldering. All note stay at the right tune. Next day I recheck them, all notes are out of tune. Even I turn TM5 to the max. I am not able to get a exact one octave. Something like C1 to B1 is all I can get for each octave. I never get the octave from C1 to C2 then C3 and C4 in one octave range. It's like the octave range got narrow or somethng. This is so weird. I have a few x0xb0x have the same problem like this. I am sure I use correct resistors/caps/diode/transistor. Soldering on each joint is fine too. There is not many parts in the VCO section. Have u got any idea what cause this strange problem. All these x0xb0x has one common problem, they are all in the right tune when I first finish the soldering and the problem always comes up on the second day when I try to recheck the tune.