[Amps] Fan for SB220

[David G4FTC]

> A local ham buddy just got back into the hobby after an 8 year hiatus and got a hold of 2 SB220's. He noticed they run hot and he asked the following question...so I figured there are folks out here who might know the answer
> 
> "....see how guys like the Harbach fan kit for the SB220? Mine is running hot and LOUD. I oiled the
> bearings and cleaned it off of dust, but it's still got to go"
> 
> Anyone done this mod?
> 
> I recommended a small muffin on top to help extract the hot air for now. I did it on my old 30L1 and it sure cooled it down.
> 
> Thanks

 
 
I'm using one of the Harbach fans on a SB220 - they move a lot more air than the original Heathkit fans.
 
Higher air-flow = higher noise
 
But I can't say I've noticed that it runs hot.
 
Regards
 
David G4FTC