Differences

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--- hotrod [2023/02/15 15:11] – [Rework solder joints] wadmin
+++ hotrod [2023/02/15 15:51] – [Replace power capacitors] wadmin
@@ Line 139: / Line 139: @@
 {{drawio>hotrod:soldertracks.png}}
-//Example of HotRod's 10W PSU resistors with strengthened copper tracks - Source Music Electronics Forum//
+//Example of HotRod's 5W PSU resistors with strengthened copper tracks - Source Music Electronics Forum//
 Simply scratch the varnish over tracks using a sharp knife to reveal raw track copper, clean with alcohol/acetone, and then apply solder paste using iron.
@@ Line 148: / Line 148: @@
 ==== Replace power capacitors ====
-Aging components should be replaced.
+If your main power capacitors are from the IC brand, generally shipped in light grey as shown below, they are low quality chinese capacitors which are prone to leak, seriously reducing amp performance.
+Consider replacing them with same value/voltage rating (FT, etc...).
+{{drawio>hotrod:changecap.png}}
+There are some complete replacement kits avaiable on the internet, which include all components that are generally worth upgrading.
 ==== Replace burnt resistors ====
-Install stronger components for LV power stage.
+Resistors R78 and R79 of the low voltage part are 5W 470 Ohms, but are exposed to transients up to 4.9W (48V@470Ohms). Upgrading these to higher quality 10W wired resistors is encouraged. Notably, installing the resistors slightly above PCB to increase air flow is recommended.
+{{drawio>hotrod:reschange.png}}
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