[AMPS] Trouble With an AL-80A... Cause?

[Tom Rauch]

>  Wondering if i could get some help with a problem my club had 
> with our Al-80A about a week ago. Went to turn the amp on (Had 
> been working great the day before), And immediatly dident hear the 
> normal (Whoosh-Ping) Sound the amp makes when its energizeing.
> Thoguht i dident hit the On switch right, and when i went to hit it 
> again, black tinned smoke started to come out of the left vent holes by
> the Caps.  Immediatly turned it off and unplugged it. After opening the
> case, We could notice no obvious damaged parts; Not even smoke residue on
> anything. Only tipoff was the case had a slight sweet smell to it, not the
> acid smell you would expect of that black smoke. 

Measure the 10 ohm resistor on the back panel near the relay. 
Odds are it is open.

If the resistor is open, you may have a bad tube.


73, Tom W8JI
w8ji@contesting.com

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