After having some issues with degrading output power under a heavy load, it was time to perform some surgery on my trusty Astron RS-35M power supply. According to Astron, the serial number dates back to late 1990. I acquired this unit in June 1991. It was easier and more cost effective to install a new regulator board. This required some modification.
Filter caps are a known culprit for degraded performance. I replaced the Cornell-Dublier capacitor with a locally manufactured United-Chemi Con model. The “L” in the code stands for “Lansing.”
And the final touch was adding back lit LED meters. Here’s to 27 more years of solid performance powering W4MLN.
New board mounted. 
