[MRCA] bC-474 Power Supply

[Robert Nickels]

On 6/27/2025 9:12 AM, B. Smith via MRCA wrote:
> what are you using to measure the Heat Sink temperature?

I just clipped a little K type thermocouple probe onto the heatsink.   
Not lab quality measurement, hi.  I did aim the little IR thermometer at 
it and while the reflectivity is too high for reliable readings the 
screw holding the FET to the heatsink seemed to be a hot spot and it 
tracked pretty well wtih the TC.

The typical resellers of these things have no idea what they are so take 
any claims with a few grains of salt!    As proof of that I offer this 
listing on Amazon for a much fancier supply with both HV and filament 
outputs:


https://www.amazon.com/dp/B0DZGR1HPR

When you see statements like "the general chassis of the gallbladder is 
a metal shell" - that's a clue to do your own homework ;-)

73, Bob W9RAN
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