Adjusting nfb resistor: 5F2A
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funkgang49
- Posts: 130
- Joined: Sun Mar 25, 2012 4:36 pm
- Location: Northern New Jersey
Adjusting nfb resistor: 5F2A
What is the effect of adjusting the value of the NFB resistor (22K) in 5F2A circuit?
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harleyboy2112
- Posts: 33
- Joined: Sat Oct 17, 2009 7:30 pm
- Location: south dakota
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Re: Adjusting nfb resistor: 5F2A
More negative feedback (less resistance) results in a cleaner, tighter more focused sound, also less overall gain.
Less negative feedback (more resistance) results in a hairier more loose sound, a little more easily overdriven.
I actually put a variable NFB in my tweed bassman style amp. I replaced the ground switch with at pot. I l had a resistor in series with the pot to set a maximum level of nfb when the pot was all the way up (0 ohms).
I don't remember the values off the top of my head.
It's a great little mod to an amp.
Less negative feedback (more resistance) results in a hairier more loose sound, a little more easily overdriven.
I actually put a variable NFB in my tweed bassman style amp. I replaced the ground switch with at pot. I l had a resistor in series with the pot to set a maximum level of nfb when the pot was all the way up (0 ohms).
I don't remember the values off the top of my head.
It's a great little mod to an amp.