What value for the capacitor? I will definitely add to my setup. Great idea!
I powered up with the EBAY outputs in Q4, Q5, Q7, Q8. Powers up OK. I did not do a signal test yet.
I am making an order for all new outputs, drivers and protect transistors from Newark. I am not sure why I couldn't originally find them.
Thank you so much for the help thus far!
I powered up with the EBAY outputs in Q4, Q5, Q7, Q8. Powers up OK. I did not do a signal test yet.
I am making an order for all new outputs, drivers and protect transistors from Newark. I am not sure why I couldn't originally find them.
Thank you so much for the help thus far!
100uf bipolar (non-polarized).
When you power it up, make sure that there is enough heatsink compound on the thermistor to mate it to the heatsink. Do not power it up without the cover tightened down.
Before you power it up, connect the scope to the BRIDGING terminal of the channel being tested. Set the scope to 2ms and 5v/div. Make sure that the trace is a thin sharp line. If it's thick, the amp is likely oscillating and that can cause it to fail.
If you test on the HP supply, install a 15 amp fuse in the B+ line.
When you power it up, make sure that there is enough heatsink compound on the thermistor to mate it to the heatsink. Do not power it up without the cover tightened down.
Before you power it up, connect the scope to the BRIDGING terminal of the channel being tested. Set the scope to 2ms and 5v/div. Make sure that the trace is a thin sharp line. If it's thick, the amp is likely oscillating and that can cause it to fail.
If you test on the HP supply, install a 15 amp fuse in the B+ line.
Parts are ordered from mouser and Newark. Should arrive in the next few days.
Is there a reason why a 15A inline fuse is required when using the HP supply? I typically set current limit to 3-5A when doing idle testing.
Is there a reason why a 15A inline fuse is required when using the HP supply? I typically set current limit to 3-5A when doing idle testing.
I didn't know it had a current limiter. When I looked it up, I didn't DL the owner's manual, I just checked for current rating.
Oh okay. I was just curious. It’s a 0-20v 1000W max supply. Adjustable voltage and current output. They are really affordable on EBay. Mine was “for parts or not working” because it was missing a power cord!
I will update once I get the parts. Thank you for all of the help.
I will update once I get the parts. Thank you for all of the help.
Hey Perry,
The last of the parts arrived from mouser today and I got to reassembly. All is working great, the output looks and sounds perfect on all 4 channels. Thank you so much for the help.
The complete parts list was Q4,5,7,8,9,10,11,12,13,18,19,20,21,26,27,28,29,64,65,67,68,69,70,72,73,78,79 and R19,38, and 196.
I wanted to replace all the eBay parts with genuine parts so a lot of these parts were not bad and changed for longevity sake.
I have been playing music for 3 hours straight and idle current has not risen beyond 1.2A. I noticed the idle current rise from 0.6A to 0.8A, 0.92A and such as it was initially warming up. I think this is because of the thermistor bias you described earlier in this forum.
We are going to completely redo the wiring in my friends car before the amp goes back in.
Thanks again,
Steve
The last of the parts arrived from mouser today and I got to reassembly. All is working great, the output looks and sounds perfect on all 4 channels. Thank you so much for the help.
The complete parts list was Q4,5,7,8,9,10,11,12,13,18,19,20,21,26,27,28,29,64,65,67,68,69,70,72,73,78,79 and R19,38, and 196.
I wanted to replace all the eBay parts with genuine parts so a lot of these parts were not bad and changed for longevity sake.
I have been playing music for 3 hours straight and idle current has not risen beyond 1.2A. I noticed the idle current rise from 0.6A to 0.8A, 0.92A and such as it was initially warming up. I think this is because of the thermistor bias you described earlier in this forum.
We are going to completely redo the wiring in my friends car before the amp goes back in.
Thanks again,
Steve