vintage tube amp tech question, please help!
knewjak
1,231 Posts
Who knows old electronics? I am trying to make a extension cabinet with a old tube amp. My plan is to hook up a speaker to the amp, and hook the amp's input line to the output of a late 50s Wurlitzer piano. The Wurly already has a 40watt internal tube amp, but it only powers its internal speaker. The 1/4" output jack on the piano supposedly is low output so it needs to be amplified, which is why I am bringing in the new amp and speaker. Make sense? ok. so how do I hook this shit up properly without blowing myself up? if anyone has a clue, please get at me. it is much appreciated. thanks.here are some photos of the amp...
Comments
Make sure, though, that you are confident the amp actually work correctly before you try this out, that it passes signal, amplifies, etc. Tube stuff can be finniky.
There is really no chance of killing yourself unless you actually open up the amp.
good luck and let us know what happens..
Also, make sure to unplug that thing and drain the power before you go poking around inside, tube amps store a pretty powerful jolt of electricity even after you unplug them.
I did not know this, good to know.
...also when you speak of impedance are you reffering to ohm's? Regardless, I cant figure out even where to attach the left and right speaker wire on the back of that thing, got any ideas? I know that I could just keep trying a bunch of different combinations, but I want to be on the right path first. And for whatever its worth, Im only trying to hook up one speaker, so do I have to worry about bridging the speaker wire?
And Thes, thanks for the tips I appreciate it. Im not sure if the piano output is pre or post amp, Im guessing it is 'pre' as you are supposed to have a secondary amp when hooking up an additional speaker. I could be wrong though.
I would go a forum for hi-fi geeks and ask for advice there before doing anything if I were you. The amplifier section here looks like it might be a good place to start:
http://www.head-fi.org/forums/