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In Reply to: Very soft bass - scratching my head posted by single_ended on February 28, 2007 at 12:42:32:
You have a lot of Iron there.Yes, used up tubes will sound weak and lifeless.
I would do an experiment on your driver stage. You have a choke load going into an interstage transformer. Try one or the other. A simple test is to throw in a plate load resistor on the driver to note the change. You could even try pulling the choke and the interstage to listen to it iron free (with a cap). If this does not work, go through and pull your grid chokes to see if they are contributing. It looks like you went for the full montie.
Also, what is up with using 100uf and 68uf "coupling caps". Am I right that you are using these as signal passing, interstage DC blockers. Try some lower value coupling caps. Ask Mike L what he would recommend.
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Follow Ups
- Re: Very soft bass - scratching my head - Chris O 13:01:04 02/28/07 (1)
- Re: Very soft bass - scratching my head - single_ended 14:31:02 02/28/07 (0)
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