Intermittent popping sound Quicksand

[bare]

Just completed build on Quicksand. What is with an occasional popping sound? Rechecked solder joints and re-seated chip.
Amp otherwise performs great!  Paired with Quickie.

Thanks again for your help,
Bare

 

[Natural Sound]

Maybe the batteries on the quickie or quicksand are low? Voltage starvation could cause pops.

 

[bare]

Thanks for the update. The batteries are all new. Perhaps it could be one of the Quickie tubes? It doesnt happen often,
but if I leave it on without music playing I'll get an occasional pop.
Bare

 

[Bonzo]

I had the same problem.
I had to resolder all the connection for the filament heater and it worked like a charm, untill I discover I have a fault tube socket.
Try to move a bit the tube and see if it causes pops too.

But please, wait also the response of the Bottlehead crew before tryig anything!

Ciao!