RAW again

jhundt · March 24th, 2003, 01:38 PM

one member read the post below, and took the initiative to contact Allens Amps. He got a reply which included this description of the RAW control:

"The Fender blackface tone stack is a “subtractive” type of tone control network. It bleeds off the frequencies you don’t want and lets the rest go to the next gain stage. It is also very inefficient and robs the next gain stage of quite a lot of the signal. The RAW control gradually increases the impedance of these “thrown away signals” trying to go to ground thus forcing them to go on to the next gain stage. There is a dip in the tone stack about 300-400hz where the curve of the bass control overlaps the curve of the treble control. At first the RAW control brings this dip back to unity for a flatter response and then from there, it raises the entire curve which is perceived as gain."

I tried adding a (virtual) 250k linear pot in place of the standard 10k mid-range, using Duncan Amplifications Tonestack program to see what the results would be. The results were exactly as described above.

Someone should try it and see what it sounds like.

I have, and I like it. Mine is switchable, from stock mid to 250k pot.

March 24th, 2003, 01:38 PM	#1 (permalink)
jhundt Friend of Leo's Join Date: Mar 2003 Location: Netherlands Age: 54 Posts: 2,811 9 Photos	RAW again one member read the post below, and took the initiative to contact Allens Amps. He got a reply which included this description of the RAW control: "The Fender blackface tone stack is a “subtractive” type of tone control network. It bleeds off the frequencies you don’t want and lets the rest go to the next gain stage. It is also very inefficient and robs the next gain stage of quite a lot of the signal. The RAW control gradually increases the impedance of these “thrown away signals” trying to go to ground thus forcing them to go on to the next gain stage. There is a dip in the tone stack about 300-400hz where the curve of the bass control overlaps the curve of the treble control. At first the RAW control brings this dip back to unity for a flatter response and then from there, it raises the entire curve which is perceived as gain." I tried adding a (virtual) 250k linear pot in place of the standard 10k mid-range, using Duncan Amplifications Tonestack program to see what the results would be. The results were exactly as described above. Someone should try it and see what it sounds like. I have, and I like it. Mine is switchable, from stock mid to 250k pot.