My 4 Fin 400 Grew 4 Fins

[mlucitt]

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]

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.

 

[Upshaw]

Why is VO5 no good for you, Bradrock? I thought that one was pretty universal.

 

[The Rebel]

Good show!