NFB 69 spec 100 watt plexi

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dan_tramble
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NFB 69 spec 100 watt plexi

Post by dan_tramble » Sat Sep 17, 2016 6:46 pm

I am trying to calculate the best NFB for my NMV 1959 build

I see 8 ohm tap 47k was more common. I am using EL34 tubes

Would the 4 ohm and 100k give me more dirt?

Thanks in advance.

Dan
MetroAmp addict!
JTM 50/45,1987's & 1986
1959 and 2203/2204 Amps
1974 amp

Can't stop building, very addictive!

Tazin
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Re: NFB 69 spec 100 watt plexi

Post by Tazin » Sun Sep 18, 2016 10:16 am

Ninety-nine percent of the 1969 through 1970 100w Super Lead amps had a 47K from the speaker output jacks as a NFB setup. In 1971 you start to see some variance in the NFB setup for the Super Lead's (i.e. 47K from 8ohm tap). As '71 progresses you see the 47K/4ohm arrangement and then eventually the 100K/4ohm setup comes into play late in 1971.

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