[Amps] Quieting SB-1000
Vic K2VCO
vic at rakefet.com
Sun Feb 15 11:34:40 PST 2009
Gudguyham at aol.com wrote:
> The AL-80A is the same amp as the SB-1000 and I had one in here for repair
> and it needed a new fan too. Needless to say I found out that changing the
> fan was no easy task. I refused to remove the transformer and painstakingly
> replaced the old fan with a new one, and indeed it was necessary somehow to
> glue or tape the nuts to the fan before installation. It truly was a
> nightmare. I think I had to hack up the old fan pretty bad to get it out. As I
> recall it was a nightmare to replace that fan, but I did do it without removing
> the transformer. I recall making a slight groove in the side chassis so I
> could get a long screwdriver into the work area to tighten one screw. Replacing
> this fan is certainly NOT a job for the faint of heart! Needless to say I
> said a few choice words during this process! My mother would have surely put
> soap in my mouth if she heard me while doing this job!!
> Vic, sorry about your transformer hum, but transformers usually hum because
> they don't know the words. :-) Lou
Getting a good shot at the screws is hard, thanks to the filament and plate chokes. I
think I had an easier time than you...the screws were not that tight to begin with so the
old one came out easily!
This reminds me of something my friend, who is an auto mechanic specializing in Volvos,
told me. He said that he pictured the Volvo assembly line with a blower motor being
lowered over a conveyor belt, at which point a bunch of workers come running up and build
a car around it. He said that when the blower failed the best approach was to trade in the
vehicle.
--
73,
Vic, K2VCO
Fresno CA
http://www.qsl.net/k2vco
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