555 VCO not sounding

[MapacheRaper]

Hi guys, I have built this sexy thing but Im getting no sound...

Is there any guide or table of pin/voltages for troubleshooting this?

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[comrade_zero]

You have omitted the (tempco ) resistor that fits over the exponential transistors. You can use a normal resistor here if you do not have a tempco, (but you will drift out of tune more quickly) but the vco will not sound without a resistor there. It's been a while since I built my board, but it is either 1k or 2k... You may want to look over your soldering in general, it looks a bit rough in some spots.
Good luck, and I hope this helps.
c_z

[MapacheRaper]

Hawk eyes, no doubth.

Yeah, I forgot to put the tempco. I found it and solder it some days after posting this thread, but I forgot to say it. The OSC is working nicely since then.

Thank you so much for taking the time to sherlock holms it