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What are some advantages with 6550's?

12/2/1997 5:04 PM
CraigWhat are some advantages with 6550's?
I am converting a voltage regulated DC supply that has a pair of 6550's. Before I commit to a 6550 design, does anyone have any opinions or info about these tubes? Performance characteristics? Tone? Recommended plate voltages? I see that most of the designs I've looked into run 6550's at 500-600v.  

steve 6550's are great tubes.In normal op... -- 12/2/1997 6:47 PM