When I wasn't looking, elves installed reverb into my Tweed Pro
- Thread starter Scott_F
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RushOfBlood
New member
Re: When I wasn't looking, elves installed reverb into my Tweed Pro
maybe something broke
maybe something broke
Curly
Moe's Bluesman
Re: When I wasn't looking, elves installed reverb into my Tweed Pro
I just don't miss reverb on my tweed Deluxe. In fact, I don't even think about it.
I think Fender added reverb into circuits to replace some of the ambience they lost when they added negative feedback into the circuits ..
of course, the pine cabinet helps, too
I just don't miss reverb on my tweed Deluxe. In fact, I don't even think about it.
I think Fender added reverb into circuits to replace some of the ambience they lost when they added negative feedback into the circuits ..
of course, the pine cabinet helps, too
L
Lewguitar
Guest
Re: When I wasn't looking, elves installed reverb into my Tweed Pro
It's funny. When I play through my blackface Fenders I always turn the reberb to about 2 or 2.5.
But when I play through my tweed Fenders I don't miss the reverb at all.
You're right Scott. There's something about the tone of those old amps that seems to give the ambience of reverb but without reverb.
:dance:
Lew
It's funny. When I play through my blackface Fenders I always turn the reberb to about 2 or 2.5.
But when I play through my tweed Fenders I don't miss the reverb at all.
You're right Scott. There's something about the tone of those old amps that seems to give the ambience of reverb but without reverb.
:dance:
Lew
Quencho092
New member
Re: When I wasn't looking, elves installed reverb into my Tweed Pro
when did they start adding negative feedback circuits?
when did they start adding negative feedback circuits?
Re: When I wasn't looking, elves installed reverb into my Tweed Pro
You got me, but I think it's always been there. Just look at the circuit for the 5E5A on the Fender amp field guide. I know bruce has tweaked it a bit here and there, but I'm pretty sure this has always been there.
You got me, but I think it's always been there. Just look at the circuit for the 5E5A on the Fender amp field guide. I know bruce has tweaked it a bit here and there, but I'm pretty sure this has always been there.
Gearjoneser
Gear Ho
Re: When I wasn't looking, elves installed reverb into my Tweed Pro
I think it's actually the sound bouncing around inside your skull, after the soldering fumes killed your brain. hahaha
I think it's actually the sound bouncing around inside your skull, after the soldering fumes killed your brain. hahaha
L
Lewguitar
Guest
Re: When I wasn't looking, elves installed reverb into my Tweed Pro
Looks to me that the first Pro to include negative feedback in the design was the 5D5 Pro. I'm going to guess that the idea of an extension speaker jack, using negative feedback and the switch from 6SC7 preamp tubes to small bottle 12ax7 and 12ay7 preamp tubes came about at the same time. Maybe 1955? That would still have been a wide panel tweed cabinet and not the narrow panel cab.
Looks like Leo was experimenting with negative feedback in the 5D5 Pro...he applies it directly to the output tubes if I'm reading this schematic right.
Then, the next Pro, the 5E5 design, doesn't have negative feedback again! Looks like Leo changed his mind about how to apply it.
But the 5E5-A design does have negative feedback and applied in the usual way to the grid of the phase invertor tube...along with a presence control.
The presence control is part of the negative feedback circuit, BTW.
When you turn up a presence control you block negative feedback from dampening high frequencies...so the amp gets livlier and brighter.
Lew
Looks to me that the first Pro to include negative feedback in the design was the 5D5 Pro. I'm going to guess that the idea of an extension speaker jack, using negative feedback and the switch from 6SC7 preamp tubes to small bottle 12ax7 and 12ay7 preamp tubes came about at the same time. Maybe 1955? That would still have been a wide panel tweed cabinet and not the narrow panel cab.
Looks like Leo was experimenting with negative feedback in the 5D5 Pro...he applies it directly to the output tubes if I'm reading this schematic right.
Then, the next Pro, the 5E5 design, doesn't have negative feedback again! Looks like Leo changed his mind about how to apply it.
But the 5E5-A design does have negative feedback and applied in the usual way to the grid of the phase invertor tube...along with a presence control.
The presence control is part of the negative feedback circuit, BTW.
When you turn up a presence control you block negative feedback from dampening high frequencies...so the amp gets livlier and brighter.
Lew
Last edited:
Quencho092
New member
Re: When I wasn't looking, elves installed reverb into my Tweed Pro
yea same here, im pretty confused about that
yea same here, im pretty confused about that
L
Lewguitar
Guest
Re: When I wasn't looking, elves installed reverb into my Tweed Pro
From Dave Funk: "The concept of negative feedback was developed by H.S Black and his team at Bell Labs in the 1920's. The idea is to return some of the Output Signal to the front of the circuit."
The goal is reduce distortion and for the amp to have a tighter cleaner tone.
From Dave Funk: "The concept of negative feedback was developed by H.S Black and his team at Bell Labs in the 1920's. The idea is to return some of the Output Signal to the front of the circuit."
The goal is reduce distortion and for the amp to have a tighter cleaner tone.
Quencho092
New member
Re: When I wasn't looking, elves installed reverb into my Tweed Pro
hmm, interesting. what kind of tone is produced by a circuit void of negative feedback?
hmm, interesting. what kind of tone is produced by a circuit void of negative feedback?
Artie
Peaveyologist
Re: When I wasn't looking, elves installed reverb into my Tweed Pro
As Lew said, NF just brings a portion of the output back to the input, but its out-of-phase with the input. So it suppress the input. It helps to stabilize the amp, and lower distortion, but at the cost of dynamic range. It actually adds a bit of compression into the workings of the amp.
As Lew said, NF just brings a portion of the output back to the input, but its out-of-phase with the input. So it suppress the input. It helps to stabilize the amp, and lower distortion, but at the cost of dynamic range. It actually adds a bit of compression into the workings of the amp.
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