thunder thumb
New member
I Recently Aquired A Hd-500 Head...and Was Wondering Howq A Person Can Tell If They Need To Replace Tubes..... And What Settings Do You Use On Yours...........thanks
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skabassist13
Well-known member
when they become microphonic, meaning they pickup sounds from around them. a simple test is to have the amp on, not in standby, and tap the tubes(gently), if you hear a sound theyre microphonic and they need to be replaced. also loss of punch, clairty, headroom, and just general sounding ****ty are signs of tubes needing to be replaced.
Ben Clarke
Well-known member
It's generally a good idea to take any newly acquired tubed gear to a competent technician and have them go over it. Older tube stuff has a tendency to work, and even sound pretty good, even if there are parts that are just way out of spec. The filter capacitors in the power supply could be shot, as an example. They could literally explode at any time if that is the case. Other components out of spec could also cause a transformer to short. Some are cheap; some are exorbitantly unobtainable.
thunder thumb
New member
i was just wondering...when i plug into the passive jack i get a hum...but not in the active jack with the same cable and bass....warwick passive corvette
thunder thumb
New member
well let me tell you a lil about myself..lol.i got a great deal on the w****** thats the only reason i have it...i as i type am trying to figure out where to sell it..lol it plays great but i play for gospel choirs here in calif and the w****** is not cutting it. after i got the hd-500 and mm audiophile 2x12 and 2x10 cabs as one of my setups i see that i need a sterling really bad.i played one a few weeks back and let me tell you.........some kind of bass sooooooo i need to sell the w****** and try and find a sterling or smith with soapbars..anyone have a sterling willing to let go at a great price????? 
