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  #151  
Old 04-01-2014, 12:14 PM
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Nice amps Steve.
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  #152  
Old 05-25-2014, 10:42 AM
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hey is a 5u4gb the same as a 5u4g ? I want to drop one in on my single ended maggie...thanks! Besides the shape of course...
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  #153  
Old 05-25-2014, 11:30 AM
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Quote:
Originally Posted by icenine View Post
hey is a 5u4gb the same as a 5u4g ? I want to drop one in on my single ended maggie...thanks! Besides the shape of course...
They are interchangeable, yes. Same basic circuit, different shape bottle.

Dave
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  #154  
Old 05-25-2014, 11:46 AM
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thanks...!
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  #155  
Old 05-25-2014, 12:48 PM
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The 5U4GB has a little bit more max current than the 5U4G, but unless they are being run all out they are pretty much interchangeable. You could always use a GB where a G was specified, but if it is being run at max capacities, you might not want to use a G where a GB was called for. Either will work in your Maggie.
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  #156  
Old 05-25-2014, 06:48 PM
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Originally Posted by mpholland View Post
The 5U4GB has a little bit more max current than the 5U4G, but unless they are being run all out they are pretty much interchangeable. You could always use a GB where a G was specified, but if it is being run at max capacities, you might not want to use a G where a GB was called for. Either will work in your Maggie.
thanks Marc...my Maggie as sort of high pitch hum that is annoying in soft passages. I do know if it is the pre-amps I am using, the amp itself, or a tube.
So I found an old Philco 5U4GB tube on Ebay for $5 bucks to see if that may quiet it down. Shot in the dark!
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  #157  
Old 05-25-2014, 11:19 PM
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Are the filter caps replaced? They can allow ripple current in and create hum also.
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  #158  
Old 05-25-2014, 11:27 PM
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yes I think so I bought it off of ebay already recapped.
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  #159  
Old 05-25-2014, 11:31 PM
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yeah from post 100 of this thread
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  #160  
Old 05-25-2014, 11:35 PM
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Yep looks like the three caps next to the transformer replaced the can. The tube should do the trick.
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