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50W lead vs. 70's spec.
Posted: Wed Apr 06, 2011 11:43 am
by tqlspec
The only difference I can tell between the Lead and 70's Lead is the Lead has the 33uf cap replaced with a 50uf cap and the 47K ohm resistor swapped out with a 100K ohm.
Can anyone tell me what this change achieves?
Re: 50W lead vs. 70's spec.
Posted: Wed Apr 06, 2011 12:02 pm
by stef
Re: 50W lead vs. 70's spec.
Posted: Wed Apr 06, 2011 2:08 pm
by Roe
tqlspec wrote:The only difference I can tell between the Lead and 70's Lead is the Lead has the 33uf cap replaced with a 50uf cap and the 47K ohm resistor swapped out with a 100K ohm.
Can anyone tell me what this change achieves?
the 70s amps, esp those with 100k nfb, doesn't normally have a .68uf on v2a.
decreasing nfb gives more rawness, adding preamp filtering gives stiffness, the .68 gives a mid and treble boost