previous: SpeedRacer 47k is the value for the 50W heads,... -- 10/10/1999 8:15 PM

Re: NFB -- where its tapped, & NFB resistor

10/10/1999 9:28 PM

Dave M.

Re: NFB -- where its tapped, & NFB resistor quote: "47k is the value for the 50W heads, 100K is for the 100W.."     Interestingly (to me, anyway) the 47k, with the 100k in parentheses, is shown on both 100W and 50W drawings that are labeled "Unicord Incorporated" dated ~1970. It's on the schem's for 1987, 1987T, 1986, 1959, 1959T, etc., etc.   To further add to my curiosity (or, confusion?), the Reissue schem's, for 1987X and 1959SLP, both specify 100k only.     quote: "... Tapping off the 16-ohm all else equal gives more -fb."     Okay, so typically what would the difference in sound be, all else being equal?   And, all else potentially not equal, how much variance could be accounted for if I'm running into a 16 ohm load with the -fb tapped of the 4 ohm lead (my current config, fwiw)?   Sorry if I'm throwing too many possible variables out there. I'm still trying to learn some fundamentals, and how they would apply to this amp.     Thanks again,   -Dave M.

 

Replies:

Jeff I have the same question basically.... -- 10/11/1999 3:39 AM