I've encountered the first problem with my Crack today after 2 months working perfectly today. After I stopped listening this morning, I noticed the wood base of my Crack had a crack in the 'edge' ( there's a small 'gap' in the corner of the wood base. So I took out the tubes, the plates and use some super-glue to fix the base. After that, I replaced the plate and the tubes, I turned on the Crack again. Then I plugged my T1 into the Crack and...no sound in the left channel, there was only sound coming from the right one. I turned it off, then turned on again, I immediately plugged my T1 back in and the sound was coming from both channels, but as soon as the tubes got a bit warm up, there was a 'buzzing' and no sound from left channel again. I tried another driver tube ( 12AU7 ) only because I don't have any other power tube but my Bendix 6080WB, as well as turning on and off several times but none of them worked.
Next, I turned my Crack off and let the tubes cool down. I removed all the tubes, the power cord and the interconnect cable, then I placed the plate side-down to the base and tried gently touching, moving the capacitors, the joints and almost all other things in the circuit which I literally didn't know what I was doing, I was kind of doing some nonsense things there. Finally I placed all things back to its places and gave it one final try before taking the Crack to the Audio repair service.
And surprisingly, the problem has been gone since then!
I really had no idea what was wrong with my Crack, this is the first time I've had this problem with my newly-built Crack. Everything was firmed and secured as it should be.
Does anyone have any idea about this? It would be greatly appreciated! I was a bit worried.