Bottlehead Forum

Bottlehead Kits => Crack => Topic started by: timindq on April 29, 2017, 03:13:03 PM

Title: Just finished installing speedball and have voltages a bit high.
Post by: timindq on April 29, 2017, 03:13:03 PM

On the large board OA voltage is +107 and on OB voltage is +106. The B+ voltage is within tolerance and ground is 0.  Resistance checks are fine everywhere. I listened to it and all is good. Music sounds fine and without music playing the amp is dead quiet.

When I did the initial voltage checks with the Crack build all voltages were well within tolerance. Should I be concerned?

One more bit of info. The AC mains voltage in my house is notoriously high. My main system is plugged into a Furman PL-C with voltage readout which usually runs 126 VAC.

Title: Re: Just finished installing speedball and have voltages a bit high.
Post by: timindq on April 30, 2017, 02:00:35 AM

I listened to the Crack for about an hour last night with no issues. After rereading the manual I see the (+/-) 10% tolerance so maybe I'm worried for nothing. Still, I would love it if one of the pros gave me the thumbs up.

One mire bit of info: voltage readings on the small board were good during initial test. I did not recheck the small board after large board installed.

Title: Re: Just finished installing speedball and have voltages a bit high.
Post by: Paul Birkeland on April 30, 2017, 02:16:03 PM

Those voltages are a little high, but not out of the ordinary. 

Title: Re: Just finished installing speedball and have voltages a bit high.
Post by: timindq on May 03, 2017, 12:48:49 AM

Thanks for reply. It's been in use for the last few days with seemingly no ill effect.