Bottlehead Forum

Bottlehead Kits => Legacy Kit Products => Topic started by: najo49 on February 03, 2013, 05:58:48 AM

Title: c4s in paramore, it quit.
Post by: najo49 on February 03, 2013, 05:58:48 AM

The c4s in one of my paramore quit suddenly while playing music. i have replaced the 2907, And tried several mje 350s but I cant tell if the mje 350 is working properly. I had several old ones. the leds light,and comparing to the working one all voltages match up until the middle leg of the 350 which is .9 volts. Does this transistor drop voltage from 350v to the 150 volts? I need help as I have tried everything.

Title: Re: c4s in paramore, it quit.
Post by: Paul Birkeland on February 03, 2013, 06:52:12 AM

0.9V on the center leg could be a bad solder joint to the middle leg (the middle leg connects to the metal tab on the MJE-350, so it will sink some of the power of the soldering iron), or other C4S issues.

If the LED's are lighting, I'd suspect a bad solder joint on the MJE-350.