Update and final touches on the project.
* Power Supply: I swapped out the small linear power supply board for one designed by "CBZ Project" from YouTube. For more information, see his video named "DIY Class-AB Amplifier Power Supply using 6 Capacitor with Softstart". The dropper and filter capacitors were substituted to work with 120V. Similar to the JAT501 boards, I ordered five PCBs from JLCPCB.
* JAT501 Boards: Mounted to heatsinks and attached to the case bottom.
* Casework: Moved the IEC to the middle of the rear panel. Installed a patch to fill the hole left from the previous location. Finished the plywood edges with thin hardwood strips.
* Wiring: Tidy up with right-size wires. I removed the inline fuses between the power supply board and the JAT501 boards. I was also able to eliminate an annoying hum. Not sure the cause. The left channel and right channel background noise is very low. Only noticeable now up close to the speakers with no music playing.
* Power Supply: I swapped out the small linear power supply board for one designed by "CBZ Project" from YouTube. For more information, see his video named "DIY Class-AB Amplifier Power Supply using 6 Capacitor with Softstart". The dropper and filter capacitors were substituted to work with 120V. Similar to the JAT501 boards, I ordered five PCBs from JLCPCB.
* JAT501 Boards: Mounted to heatsinks and attached to the case bottom.
* Casework: Moved the IEC to the middle of the rear panel. Installed a patch to fill the hole left from the previous location. Finished the plywood edges with thin hardwood strips.
* Wiring: Tidy up with right-size wires. I removed the inline fuses between the power supply board and the JAT501 boards. I was also able to eliminate an annoying hum. Not sure the cause. The left channel and right channel background noise is very low. Only noticeable now up close to the speakers with no music playing.
Attachments
My JAT501 build went into the background for another project. But I will be returning to it soon and hope my execution could be half as neat as your's.
What's the first music you listened to once it was fired up?
What's the first music you listened to once it was fired up?
yes but its a guidline to hot rot the JAT501 here:
here it is:
means higher supply voltage :
chris
here it is:
means higher supply voltage :
- driver should be change from TO126 -BD140/139 to some TO220 drivers. his proposal are MJE15028/MJE15029
read in the forums about hfe match
or you use TO126 like the KSC3503E - VAS transitor Q9 and CCS for VAS Q7 are TO92 so heatsink is recommended!
- check your voltage ratings at your lytic caps
chris