H Hexhclass Member Joined 2010 2014-09-15 1:54 am #1 2014-09-15 1:54 am #1 I was expecting a 16 pin chip but saw this KA555.I guess this is old school design? Attachments 10580367_791631917545544_283738743_n.jpg 93.8 KB · Views: 88 P Perry Babin Member Joined 2003 bcae1.com 2014-09-15 2:00 am #2 2014-09-15 2:00 am #2 It could be a self-oscillating drive circuit and the 555 timer used for muting. H Hexhclass Member Joined 2010 2014-09-15 2:06 am #3 2014-09-15 2:06 am #3 So i should get a square wave on the PS FETs just like most designs? P Perry Babin Member Joined 2003 bcae1.com 2014-09-15 2:16 am #4 2014-09-15 2:16 am #4 On the drains, yes. I'm not sure what you'd see on the gates. Is there a set of small (smaller than primary or secondary) windings on either transformer? T tiomilo Member Joined 2012 2014-09-22 7:08 pm #5 2014-09-22 7:08 pm #5 That is non pwm oscillating circuit. ( sucks) cheap latest 90`s Chinese amps have it. I see few ones. Sent from my GT-I9300 using Tapatalk Status Not open for further replies. Share: Facebook X (Twitter) LinkedIn Reddit Pinterest Tumblr WhatsApp Email Link
P Perry Babin Member Joined 2003 bcae1.com 2014-09-15 2:00 am #2 2014-09-15 2:00 am #2 It could be a self-oscillating drive circuit and the 555 timer used for muting. H Hexhclass Member Joined 2010 2014-09-15 2:06 am #3 2014-09-15 2:06 am #3 So i should get a square wave on the PS FETs just like most designs? P Perry Babin Member Joined 2003 bcae1.com 2014-09-15 2:16 am #4 2014-09-15 2:16 am #4 On the drains, yes. I'm not sure what you'd see on the gates. Is there a set of small (smaller than primary or secondary) windings on either transformer? T tiomilo Member Joined 2012 2014-09-22 7:08 pm #5 2014-09-22 7:08 pm #5 That is non pwm oscillating circuit. ( sucks) cheap latest 90`s Chinese amps have it. I see few ones. Sent from my GT-I9300 using Tapatalk Status Not open for further replies. Share: Facebook X (Twitter) LinkedIn Reddit Pinterest Tumblr WhatsApp Email Link
H Hexhclass Member Joined 2010 2014-09-15 2:06 am #3 2014-09-15 2:06 am #3 So i should get a square wave on the PS FETs just like most designs? P Perry Babin Member Joined 2003 bcae1.com 2014-09-15 2:16 am #4 2014-09-15 2:16 am #4 On the drains, yes. I'm not sure what you'd see on the gates. Is there a set of small (smaller than primary or secondary) windings on either transformer? T tiomilo Member Joined 2012 2014-09-22 7:08 pm #5 2014-09-22 7:08 pm #5 That is non pwm oscillating circuit. ( sucks) cheap latest 90`s Chinese amps have it. I see few ones. Sent from my GT-I9300 using Tapatalk Status Not open for further replies. Share: Facebook X (Twitter) LinkedIn Reddit Pinterest Tumblr WhatsApp Email Link
P Perry Babin Member Joined 2003 bcae1.com 2014-09-15 2:16 am #4 2014-09-15 2:16 am #4 On the drains, yes. I'm not sure what you'd see on the gates. Is there a set of small (smaller than primary or secondary) windings on either transformer? T tiomilo Member Joined 2012 2014-09-22 7:08 pm #5 2014-09-22 7:08 pm #5 That is non pwm oscillating circuit. ( sucks) cheap latest 90`s Chinese amps have it. I see few ones. Sent from my GT-I9300 using Tapatalk Status Not open for further replies.
On the drains, yes. I'm not sure what you'd see on the gates. Is there a set of small (smaller than primary or secondary) windings on either transformer?
T tiomilo Member Joined 2012 2014-09-22 7:08 pm #5 2014-09-22 7:08 pm #5 That is non pwm oscillating circuit. ( sucks) cheap latest 90`s Chinese amps have it. I see few ones. Sent from my GT-I9300 using Tapatalk
That is non pwm oscillating circuit. ( sucks) cheap latest 90`s Chinese amps have it. I see few ones. Sent from my GT-I9300 using Tapatalk
