Differences

This shows you the differences between two versions of the page.

--- hotrod [2023/02/15 15:24] – [Apply solder paste on weakened tracks] wadmin
+++ hotrod [2023/02/15 15:59] – [Bugfix #5 - Glue them all] wadmin
@@ Line 147: / Line 147: @@
 ===== Bugfix #4 - Replacing and strengthening PCB components =====
+The components listed in this section are worth replacing if any damage or sound issue is identified.
+There are some complete replacement kits avaiable on the internet, which include all components that are generally worth upgrading.
 ==== 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}}
 ==== 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}}
 ----
 ===== Bugfix #5 - Glue them all =====
+If not implemented, use RTV glue to fix large components, including all big capacitors.
+{{drawio>hotrod:glue.png}}
+Generally, medium sized capacitors from Power Supply are not glued and I suggest to glue them, because radial capacitors are sensitive to vibrations and this amp is really punchy.
 ----