LFO modul too fast?

[KurtM]

Hello,
I just finished some MFOS modules and most things really work fine. But I have a problem with the LFO. In my oppinion, it runs much too fast. I have an oscilloscope, but it is an ancient one from the former USSR that shows nice waves but cannot be callibrated or used to meassure anything exactly...
I describe the problem in detail:
When amplified, the lfo is audible. I can't meassure it exactly but it seems to be around 400hz.
The LED shines all the time (or it flashes very fast).
Coarse and Fine have no effects.
Nevertheless, everything else seems to be quite fine. I can use it for (very fast) modulation. The scope shows perfect triangle, sine, rectangle and ramp...

Has anyone an idea where I could start to search for the mistake I made?

Thanks in advance
Kurt

[KurtM]

Sorry guys for disturbing without looking...
I just used a 2N3904 instead of 2n3906 Q3. Changed it and now everything works...
Best
Kurt