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Re: 5F6A clone too bassy

9/24/2005 7:38 PM
GordRe: 5F6A clone too bassy
I built a 5F6A clone, and used the tone stack with a 100k slope resistor and .1uf bass cap. That cuts out a ton of bottom end. I have been tracking photos of original 5F6A Bassman amps on eBay for well over a year now, and have yet to see one wired like on the schematic. Every single original 1959 Bassman I've seen on eBay in the past year has been wired this way, without exception.  
 
Another change that might affect the tone of the amp is to use the 25k pot presence control with the extra 4700 Ohm resistor. All of the Bassman amps on eBay that I've seen were wired like this, too.  
 
Since were talking about it, all the amps I've seen on eBay had a 6800 Ohm resistor in the phase inverter as opposed to 10k.  
 
I'm convinced that that famous, elusive Bassman tone we're all after is the one in the amps, not on paper. It makes sense to me.  
 
You can try out these three mods, and if you don't like them, you can always go back to what you had. It doesn't hurt.  
 
I believe that there are a couple of vintage Bassmans on eBay right now, and they are wired just as I described above.  
 
When wired as above, I love the sound coming out of the amp's dark channel with the mid control set all the way up.  
 
Gord

 
Replies:
Greg Simon The reissue Bassmans were always to... -- 9/25/2005 1:27 AM