There are a few tubes that shouldn't be operated horizontally, or must be oriented in a specific way if they are. These are usually 'directly-heated' tubes such as the 5U4 rectifier, where the hot filament can sag far enough to come in contact with the anode. Here's what the 5U4 datasheet says:
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Woah, working the chocolate beast on a glass table that is brave. You should get a real work bench with a 6" vise and bench grinder/wire wheel combo. It is amazing how handy those tools are.
Woah, working the chocolate beast on a glass table that is brave. You should get a real work bench with a 6" vise and bench grinder/wire wheel combo. It is amazing how handy those tools are.
Yeah that amp is quite heavy, almost 60 pounds, I was mostly worried about the glass top. Glass , usually, fails catastrophically. And it could be something minor, like dropping a screwdriver or other tool hard end first, on the top that makes a small fault and compromises the integrity of the entire piece.I was just setting the bias and balance on its initial fire up. No special tools necessary.
The whole weight of the deuce is on the one OPT. It's remarkably stable.