Nobelium - tube bass preamp project

@vigilante398

I thought I remembered seeing this info somewhere but I looked everywhere I could think of and didn’t see it. What frequency (roughly) does the treble control start affecting? Seems like somewhere down in the 4-5k range? Is there a spot I could try changing values to try getting that up a little higher? I find it’s just pulling a hair too much of the mids up with it. I thought if it was as easy as swapping out a resistor or two I might give it a whirl.

Thanks!
 
Creekside said:
@vigilante398

I thought I remembered seeing this info somewhere but I looked everywhere I could think of and didn’t see it. What frequency (roughly) does the treble control start affecting? Seems like somewhere down in the 4-5k range? Is there a spot I could try changing values to try getting that up a little higher? I find it’s just pulling a hair too much of the mids up with it. I thought if it was as easy as swapping out a resistor or two I might give it a whirl.

Thanks!
Click to expand...
The Noble/Nobelium uses a Fender-style tonestack with a fixed mids response. It's a shelving filter with no fixed frequencies, and the controls are very interactive.

That being said, you could try increasing the value of the 270pF cap in the tonsetack to something like 470pF or 500pF, that should tame the highs a bit.
 
Creekside said:
@vigilante398

I thought I remembered seeing this info somewhere but I looked everywhere I could think of and didn’t see it. What frequency (roughly) does the treble control start affecting? Seems like somewhere down in the 4-5k range?
Click to expand...
That would be extraordinarily high as a starting point. By maybe an octave or two, at least. ;)
 
Check it in the TSC calculator first so you can see whats happening, remember to leave the Mid pot on 10 as the Nobelium uses R21 instead of a Mid pot.
Just click on "Edit" and change values and then click "Apply" and then you can slide the Bass and Treble pots to see what happens, you can also change the R21 resistance but keep the "Mid" pot slider on 10 since it is a fixed resistor.
Here is the link to the TSC already set for the Nobeliums tone stack: https://www.guitarscience.net/tsc/f...C3=100n&RB_pot=LogA&RM_pot=Linear&RT_pot=LogA
 
Tassieviking said:
I just noticed that it looks like the 1/4" output seems wired in reverse, the signal is wired to the shield ring and the ground is wired to the tip on the socket.
If the 1/4" out works the socket must be insulated from the box by the powder coating only, it would be best if the wires were reversed to the correct position.
I must have looked at the picture lots of times and not noticed until now.
Cheers
Mick
Click to expand...
You noticed right.
I already sell the nobelium to my friend and I noticed it while testing. It’s already changed.
 
There are drill guides and art work for all the C2CE projects on the C2CE webpage, there is white artwork for dark boxes and black artwork for light boxes.
I get them made at Tayda since they can drill and apply the artwork to any box they sell.

c2celectronics.com

Drill Templates and Artwork Files

Due to the amount of time and logistics required for offering pre-drilled enclosures, I have made the decision that I will not be offering them going forward. I will continue to include drill templ…
c2celectronics.com c2celectronics.com

V

Thread 'C2C Electronics - Tayda Drill Templates'

It was requested that I put together some Tayda drill templates for my DIY projects for those that are inclined to use that sort of thing. These have all been verified for fit with the corresponding PCB. Please tag me in any build reports using these. Not because I need them for my records or anything, I just like seeing them :cool:

Ambassador Drill Template

Black Eye Drill Template

Diplomat Drill Template

Lab Rat Drill Template

Particle Accelerator Drill Template

Vampire Slayer Drill Template

Nobelium Drill Template

King Nothing...
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  • This ROCKS!
 

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Tassieviking said:
There are drill guides and art work for all the C2CE projects on the C2CE webpage, there is white artwork for dark boxes and black artwork for light boxes.
I get them made at Tayda since they can drill and apply the artwork to any box they sell.

c2celectronics.com

Drill Templates and Artwork Files

Due to the amount of time and logistics required for offering pre-drilled enclosures, I have made the decision that I will not be offering them going forward. I will continue to include drill templ…
c2celectronics.com c2celectronics.com

V

Thread 'C2C Electronics - Tayda Drill Templates'

It was requested that I put together some Tayda drill templates for my DIY projects for those that are inclined to use that sort of thing. These have all been verified for fit with the corresponding PCB. Please tag me in any build reports using these. Not because I need them for my records or anything, I just like seeing them :cool:

Ambassador Drill Template

Black Eye Drill Template

Diplomat Drill Template

Lab Rat Drill Template

Particle Accelerator Drill Template

Vampire Slayer Drill Template

Nobelium Drill Template

King Nothing...
  • Like
  • Love
  • This ROCKS!
Click to expand...
You’re the best. Thank you! Got it all boxed up but not getting any output 🤕 now begins the process of troubleshooting
 
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