[Amps] Quieting SB-1000

[David J Windisch]

I had a M-B 300D like that ovloV, except it was built around a vacuum pump, 
not a blower.  5 years old, and the dealer couldn't find and fix a vacuum 
leak.   Doorlocks, cruise, windows, climate control and it seemed like 
everything else ran off that vacuum pump.  Even the radio.  Bucketabolts is 
still running 31 years and 500,000 miles later (cuz it doesn't suck . . 
oooooh baaad . . .)
If that xfmr is a DAHL type, try jamming some shims down between the core 
and the bobbin.  Btdt.  73 Dave W8FGX

----- Original Message ----- 
From: "Vic K2VCO" <vic at rakefet.com>
To: <Gudguyham at aol.com>
Cc: <amps at contesting.com>
Sent: Sunday, February 15, 2009 11:34 AM
Subject: Re: [Amps] Quieting SB-1000


> 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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