S.E.X start up popping sound

[Rayvolution]

I have a S.E.X kit with C4S that I built a few months ago and it was perfect! However in the last week for some strange reason the left channel pops and hisses for the first 30 seconds to a few minutes whenever I turn it on. It doesn't pop or hiss after a little warm up, but the period for which it pops and hisses varies every time. I've switched tubes, headphones, cables, and sources to no avail. Plz help

[Zimmer64]

Have you checked all the solder joints again?

Michael

[Rayvolution]

Yeah I did noticed the 10Kuf 10v capacitor somehow became disconnected on one side but I resoldered it and the noise is still there.

It only pops and sounds like a windstorm when I cold start the s.e.x if I turn it off after some use then turn it back on its fine.

Note: The fuzz/popping occurs even with the volume at 0

[saildoctor]

I had a problem like that once with my Paramounts when I changed the cathode resistors.  I plain old forgot to solder one of the wires crimped to a terminal.  I finally caught it after the third 'thorough check' of my solder joints.