im working on this amp and the power has issues. the 494 ic is over heating. would it be defective?
T timwebb Member Joined 2010 2013-03-11 3:37 am #1 2013-03-11 3:37 am #1 im working on this amp and the power has issues. the 494 ic is over heating. would it be defective? ••• More options Share P Perry Babin Member Joined 2003 bcae1.com Paid Member 2013-03-11 3:54 am #2 2013-03-11 3:54 am #2 You need to be specific. What are the issues? It's possible that the IC is defective but more information will be needed to determine if there are other problems. ••• More options Share T timwebb Member Joined 2010 2013-03-11 11:36 am #3 2013-03-11 11:36 am #3 i got the amp with a blown power supply. im powering up with no fets in the circuit. i used the MJE172 for the drivers in the power supply it worked for a few mintues ••• More options Share T timwebb Member Joined 2010 2013-03-12 5:52 pm #4 2013-03-12 5:52 pm #4 I think I found the issue. The two pins that's connected to the drive transistors. From the 494 are Shorted together. I read 12.8 ohms across them. ••• More options Share Show hidden low quality content Status This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button. Share: Facebook Twitter Reddit Pinterest Tumblr WhatsApp Email Share Link
P Perry Babin Member Joined 2003 bcae1.com Paid Member 2013-03-11 3:54 am #2 2013-03-11 3:54 am #2 You need to be specific. What are the issues? It's possible that the IC is defective but more information will be needed to determine if there are other problems. ••• More options Share T timwebb Member Joined 2010 2013-03-11 11:36 am #3 2013-03-11 11:36 am #3 i got the amp with a blown power supply. im powering up with no fets in the circuit. i used the MJE172 for the drivers in the power supply it worked for a few mintues ••• More options Share T timwebb Member Joined 2010 2013-03-12 5:52 pm #4 2013-03-12 5:52 pm #4 I think I found the issue. The two pins that's connected to the drive transistors. From the 494 are Shorted together. I read 12.8 ohms across them. ••• More options Share Show hidden low quality content Status This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button. Share: Facebook Twitter Reddit Pinterest Tumblr WhatsApp Email Share Link
You need to be specific. What are the issues? It's possible that the IC is defective but more information will be needed to determine if there are other problems.
T timwebb Member Joined 2010 2013-03-11 11:36 am #3 2013-03-11 11:36 am #3 i got the amp with a blown power supply. im powering up with no fets in the circuit. i used the MJE172 for the drivers in the power supply it worked for a few mintues ••• More options Share T timwebb Member Joined 2010 2013-03-12 5:52 pm #4 2013-03-12 5:52 pm #4 I think I found the issue. The two pins that's connected to the drive transistors. From the 494 are Shorted together. I read 12.8 ohms across them. ••• More options Share Show hidden low quality content Status This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button.
i got the amp with a blown power supply. im powering up with no fets in the circuit. i used the MJE172 for the drivers in the power supply it worked for a few mintues
T timwebb Member Joined 2010 2013-03-12 5:52 pm #4 2013-03-12 5:52 pm #4 I think I found the issue. The two pins that's connected to the drive transistors. From the 494 are Shorted together. I read 12.8 ohms across them. ••• More options Share
I think I found the issue. The two pins that's connected to the drive transistors. From the 494 are Shorted together. I read 12.8 ohms across them.
