Nahash5150 10,775 Posted July 7 Posted July 7 A received a Hafler DH-220 to fix along with an extensive upgrade kit. It came with a USB drive with docs and pics. A well put together project. The unit was in dire need of service. Old, crusty, and very dirty. Top of unit: Near power switch and primary fuse: Taken apart: I removed most of the screws and derusted them, then cleaned and derusted the chassis, heat sinks and other various parts. It was a load of work! But it cleaned up pretty good. All new amp driver boards that had to be stuffed by hand. Crazy! New speaker binding posts and RCA jacks as well. It looks so much better now though: Sorry - forgot to snap a picture of it all put together. But here's an internet one: 3
Community Admin AndrewJohn 10,507 Posted July 9 Community Admin Posted July 9 Nice work, Greg. Can you share what you do to "de-rust"..., do you use mechanical or chemical derust techniques? My mother just gave me the old Fisher amp that I grew up with..., and she had it in her basement. My first look at it, and I realized the basement humidity had done a similar light rusting to your hafler... 1
Nahash5150 10,775 Posted July 16 Author Posted July 16 On 7/9/2025 at 2:40 PM, AndrewJohn said: Nice work, Greg. Can you share what you do to "de-rust"..., do you use mechanical or chemical derust techniques? My mother just gave me the old Fisher amp that I grew up with..., and she had it in her basement. My first look at it, and I realized the basement humidity had done a similar light rusting to your hafler... I used Krud Kutter - The Must for Rust solution 1
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