Bottlehead Forum

Bottlehead Kits => Crack => Topic started by: Ankaret on November 02, 2014, 01:12:52 PM

Title: Enjoying the music and then slowly it fades out...help?
Post by: Ankaret on November 02, 2014, 01:12:52 PM: I was sitting there enjoying my favorite Fleetwood Mac through the crack and 650s and all of a sudden the song fades out in the middle (although I must say it was a nice sounding fade out!).

Anyway, the tubes aren't glowing anymore when it's on, and obviously no sound. Also, this happened a couple times in this listening session, where the sound would begin to fade in both ears for a moment and then come back. Then finally it just faded completely as described above and never came back.

Any help with diagnosis would be much appreciated. I flipped it over to have a look and everything looks to me at first sight to be in place and in good shape...

Thanks in advance for any suggestion/tips/help figuring out how to get me back to crack.
Title: Re: Enjoying the music and then slowly it fades out...help?
Post by: tjessen on November 02, 2014, 04:57:04 PM: I assume the HLMP6000 led's on the driver socket aren't lighting?
Title: Re: Enjoying the music and then slowly it fades out...help?
Post by: Paul Birkeland on November 02, 2014, 05:12:59 PM: The red/black twisted pair of wires that feeds B7/B8 and comes from power transformer terminals 4 and 5 is responsible for making the tubes glow, perhaps there's a loose joint there?

Otherwise, the wiring from the IEC inlet/power switch could be loose and preventing the line voltage from properly feeding the power transformer.
Title: Re: Enjoying the music and then slowly it fades out...help?
Post by: Ankaret on November 04, 2014, 04:34:41 PM: Just plugged it back in to see about the LEDs and what do you know, it's working again. Strange. Something maybe got too hot? Ill see if it happens again after some listening.
Title: Re: Enjoying the music and then slowly it fades out...help?
Post by: Paul Birkeland on November 06, 2014, 10:53:35 AM: You very likely have a loose connection in the amplifier that will make intermittent contact depending on heat and being jostled.

-PB