My 4 Fin 400 Grew 4 Fins

mlucitt

Chief Journeyman
Joined
Jun 24, 2011
Messages
1,443
Location
Jacksonville, FL
#21
I probably ought to remove the fins and add some HS grease. I was wanting to try and anodize the HS black but who's going to see them and the grease would be an issue.
I would let it run for awhile at semi-painful levels and check the fins. The human hand is very sensitive to temperature differences. If the new fins feel almost as warm, or just as warm, I would pronounce them Satisfactory. If they are pulling that output transistor heat away to the edges of the fins, that is the goal and you have achieved it.
 

orange

Veteran and General Yakker
Joined
Jul 6, 2010
Messages
16,751
Tagline
Broken beyond repair but highly affable
#22
I had one of those little 80s Technics receivers with a New Class A amp section that ran like a furnace and my friend thought it was going to catch fire when I gave it to him. Also a Hitachi labeled Class H and both were less than 25-30 watts a channel but I gathered just about the most inefficient amps I ever had that had no tubes.

Such was the junk produced in the early 80s.
 
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