Jim kelly single channel layout ?
Moderators: pompeiisneaks, Colossal
Jim kelly single channel layout ?
the schematic is on his site
http://www.jimkelleyamplifiers.com/schem.htm
sounds like a great amp, very dumble like with distortion and very jtm45 clean when rolled down.
https://www.youtube.com/watch?v=NKt7S89YMnA
https://www.youtube.com/watch?v=ouVuF-y8bog
does anyone know if there's a good layout for this amp somewhere ?
http://www.jimkelleyamplifiers.com/schem.htm
sounds like a great amp, very dumble like with distortion and very jtm45 clean when rolled down.
https://www.youtube.com/watch?v=NKt7S89YMnA
https://www.youtube.com/watch?v=ouVuF-y8bog
does anyone know if there's a good layout for this amp somewhere ?
- JazzGuitarGimp
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Re: Jim kelly single channel layout ?
He claims to be getting 60 watts RMS from a quartet of 6V6's. I wonder how he's doing that.
Lou Rossi Designs
Printed Circuit Design & Layout,
and Schematic Capture
Printed Circuit Design & Layout,
and Schematic Capture
Re: Jim kelly single channel layout ?
Is it just me, or does this sound exactly like he always sounds? I'm pretty sure at this point that there is no brand of amplifier that will make me care to listen to this guy.Ang3lus wrote:
sounds like a great amp, very dumble like with distortion and very jtm45 clean when rolled down.
https://www.youtube.com/watch?v=NKt7S89YMnA
Re: Jim kelly single channel layout ?
There's a missing resistor in the cathodyne. There should be a 1M5 in series with the 3M6 to ground to bias the cathodyne.
Shane
Shane
Re: Jim kelly single channel layout ?
What do the two 1N914 diodes from grid to ground do?
Tom
Don't let that smoke out!
Don't let that smoke out!
Re: Jim kelly single channel layout ?
They help to reduce blocking distortion, kind of in lieu of a grid stopper.
Normally you could use a diode and a zener back to back set so they come into play at around the tubes cut off input voltage say around 5v ish.
In this case jim used it at around 1.2V to add a little diode clipping at higher settings of the volume pot.
Shane
Normally you could use a diode and a zener back to back set so they come into play at around the tubes cut off input voltage say around 5v ish.
In this case jim used it at around 1.2V to add a little diode clipping at higher settings of the volume pot.
Shane
Re: Jim kelly single channel layout ?
Thanks a lot for the info.
I find it very interesting what some designers come up with in guitar amps.
The first thing I noticed was the lack of grid resistors.
I find it very interesting what some designers come up with in guitar amps.
The first thing I noticed was the lack of grid resistors.
Tom
Don't let that smoke out!
Don't let that smoke out!
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Re: Jim kelly single channel layout ?
First thing I noticed was 176V across the 1st pot!
Re: Jim kelly single channel layout ?
Tom
Don't let that smoke out!
Don't let that smoke out!
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Re: Jim kelly single channel layout ?
Here are a few shots of a Kelly Reverb that a friend of mine owns. He used it in a band I played in for many years.
Although this amp is not even close to "Amp Garage Tidy", it did kick but and sang like a bird as well.
Look at how close the power tubes are packed in there.
Although this amp is not even close to "Amp Garage Tidy", it did kick but and sang like a bird as well.
Look at how close the power tubes are packed in there.
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Re: Jim kelly single channel layout ?
That's a mistake in the drawing. Should be a 10n coupling cap there.Smokebreak wrote:First thing I noticed was 176V across the 1st pot!
Re: Jim kelly single channel layout ?
Holy moly,
look at all them wires!
The assembler must have worked for Fender in the late 60's.
What is that stack of caps all about?
look at all them wires!
The assembler must have worked for Fender in the late 60's.
What is that stack of caps all about?
Tom
Don't let that smoke out!
Don't let that smoke out!