E
ecc83
Well-known member
My comment about the extinguisher might be thought flippant?
I assure you it wasn't. Manufacturers of electrical equipment go to great lengths to inform people of the does and don'ts of safe operation, blocking off ventilation holes is bad news.
Even if there is no actual fire the internal components of a valve amp will reach much higher temperatures than the design limits. This will cause red plating shortening valve life drastically and premature electrolytic cap failure.
"But I am only going to do it for this 5 minute lick!" That's fine but people forget, go out, get pissed/stoned. A cathode biased amp of the AC30 persuasion gets just as hot when NOT played as when thrashed. Standby? Well you can't do it under the blanket but even so transformers are still getting pretty warm.
I rate the advice as not as serious as lifting mains earths to fix hum loops (DO NOT DO IT!!) but likely to kill your kit.
Dave.
I assure you it wasn't. Manufacturers of electrical equipment go to great lengths to inform people of the does and don'ts of safe operation, blocking off ventilation holes is bad news.
Even if there is no actual fire the internal components of a valve amp will reach much higher temperatures than the design limits. This will cause red plating shortening valve life drastically and premature electrolytic cap failure.
"But I am only going to do it for this 5 minute lick!" That's fine but people forget, go out, get pissed/stoned. A cathode biased amp of the AC30 persuasion gets just as hot when NOT played as when thrashed. Standby? Well you can't do it under the blanket but even so transformers are still getting pretty warm.
I rate the advice as not as serious as lifting mains earths to fix hum loops (DO NOT DO IT!!) but likely to kill your kit.
Dave.