On Sun, Apr 30, 2023 at 12:00 PM, Kent Trimble, K9ZTV wrote:
What you say is true. ?What I said is also true.
?
I wasn't questioning your assessment, I was narrowing the problem.
Kent,
Let's look at it from the power switch manufacturer's perspective.. the power switch currently installed in my LA-1K will be declared
defective at final test for failing to fully meet the stated performance specifications of the power switch.? Then, for continuous manufacturing process improvement purposes, they may request the defective power switch be undergone certain failure mode analysis procedure.. for example, identifying a marginal batch of LED (light inside the power switch) imported from the PRC wasn't caught by their incoming QC personnel.
So, while all I care about, as an end user, is the
final test results, you would rather focus on root causes; maybe even including the failure mode analysis piece.? Bottom line: Contrary to your first assessment this morning... to be accurate, the power switch assembly currently installed in my LA-1K has failed to fully meet its performance specifications.
Please find attached an image file showing the
replacement power switch currently installed in my LA-1K and the original power switch (deemed defective by Mr. Ward) sitting next to the piece of paper that accompanied the replacement power switch that Palstar shipped me at my request, free of charge.
I personally performed the power switch remove/replace actions to return my LA-1K to fully serviceable condition.? Just FYI... I took a field engineering service job (i.e. a glorified technician) after I was laid off from my very first real engineering job in the semiconductor industry in Silicon Valley.? My lead taught me a few things about servicing small and medium size computers.? Lol.. they even sent me to their in-house tech school to service line printers and teletype machines.? Oh well, long story short, I went back to manufacturing integrated circuits as a real engineer after the U.S. economy recovered.
So, remove/replace the LA-1K power switch is a simple task for me.? But from seeing the LA-1K online reviews (e.g. ) I had no ideas that a nearly USD $4,000 Palstar amplifier would start acting like some hobby kits sold on PRC websites, my friend.
73,
Ray
KJ5MI
