Bottlehead Forum

Bottlehead Kits => Crack => Topic started by: jrihs on June 21, 2012, 12:44:20 PM

Title: - Advice - Developing a crack problem
Post by: jrihs on June 21, 2012, 12:44:20 PM

Hi,  My crack is hurting...um wait....When I turn on my crack... :-\ When I turn on my amp, I get a loud zipper-like sound in the headphones for several seconds, then all's well...no noise. Usually the zipper ends w/ a pop or crack sound. It only happens on cold start and it will always happen now, but not if I turn it off and then quickly back on. It is not either of the tubes. It does not happen when warmed-up...but, it will Pop when I turn it off IF its been on awhile...or so it seems. It is independent of the volume and input as well.

Any solutions?

Yours sadely, zipperhead

Title: Re: - Advice - Developing a crack problem
Post by: Doc B. on June 21, 2012, 01:26:52 PM

Check all your solder joints. Verify the filter capacitor orientations. Redo voltage measurements.

Title: Re: - Advice - Developing a crack problem
Post by: Grainger49 on June 21, 2012, 01:36:41 PM

There is a sticky in the Crack folder about eliminating warm up thumps and pops.  Try that modification as well. 

This is a new development, right?  How long has the Crack been operating?

Title: Re: - Advice - Developing a crack problem
Post by: jrihs on June 21, 2012, 04:08:56 PM

Yes, this is a new development. I have used it heavily for over a year now. I have had some noisy tubes in it of late but fixed them.