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Forums
4hv.org :: Forums :: General Science and Electronics
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Grandpa's Tube Amplifier

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uzzors2k
Sun Feb 22 2009, 03:21PM
uzzors2k Registered Member #95 Joined: Thu Feb 09 2006, 04:57PM
Location: Norway
Posts: 1308
 		I fixed the amp! The problem was lacking grid bias and grid leak resistor. It still hums even with the volume turned right down, but I'll save that problem for another day. There's still the tweaks Harry mentioned to preform. My brother volunteered to play "Voodoo Child" by Jimi Hendrix to show that it works. Link2
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Proud Mary
Sun Feb 22 2009, 05:05PM
Proud Mary Registered Member #543 Joined: Tue Feb 20 2007, 04:26PM
Location: UK
Posts: 4992
 		Hurrah! I knew the grid bias was at the root of the problem! smile
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