Nobelium - tube bass preamp project

[alaistair]

Hey guys - for those daunted by the build - its really not that hard.

I made a video tutorial of the complete Nobelium build. I though I'd share it if anyone was thinking of building their own. While it is not a beginner build, it's really not that difficult if you take your time.

It is a long video, and designed for you to build yours along with me.
Enjoy!

(This in NOT a paid promotion or endorsement - it was just a fun project, especially if you cannot affort/wait for a Noble).

 

[andare]

Hey guys - for those daunted by the build - its really not that hard.

I made a video tutorial of the complete Nobelium build. I though I'd share it if anyone was thinking of building their own. While it is not a beginner build, it's really not that difficult if you take your time.

It is a long video, and designed for you to build yours along with me.
Enjoy!

(This in NOT a paid promotion or endorsement - it was just a fun project, especially if you cannot affort/wait for a Noble).

Fantastic video. Thank you. Bonus point for the beautiful Scottish accent.

 

[chongmagic]

Can I use a 390pf silver mica in place of the 270p?

 

[vigilante398]

Can I use a 390pf silver mica in place of the 270p?

Sure, it will just shift the response of the treble control.

 

[Tassieviking]

Can I use a 390pf silver mica in place of the 270p?

Since I can't sleep again I ran it through TSC, not much difference between the two.
The Mid pot stays on full since it is just a resistor in the Nobelium.

Standard Tonestack: https://www.guitarscience.net/tsc/f...C3=100n&RB_pot=LogA&RM_pot=Linear&RT_pot=LogA

390Pf in tonestack: https://www.guitarscience.net/tsc/f...C3=100n&RB_pot=LogA&RM_pot=Linear&RT_pot=LogA

I ran a sweep but it is not completely correct since the Mid should not sweep, 390pF seems to just affect the dip at around 250Hz to 400Hz, the 390pF just dropped the mid dip and Treble by about 40 Hz.

 

[itchymusic]

Hi,
I just finished my Nobelium build (from Musikding in Germany) yesterday. Unfortunately I'm not getting any sound at all. Neither through the di or the amp out.
Both LEDs light up, I can measure ground all the way through, the connection is fine between input jack and in on the PCB. Both tubes heat up as well - no more than they're easy to touch.
The soldering looks quite fine, but does anyone have some indications as to what and where I could measure?
Thanks

 

[vigilante398]

Hi,
I just finished my Nobelium build (from Musikding in Germany) yesterday. Unfortunately I'm not getting any sound at all. Neither through the di or the amp out.
Both LEDs light up, I can measure ground all the way through, the connection is fine between input jack and in on the PCB. Both tubes heat up as well - no more than they're easy to touch.
The soldering looks quite fine, but does anyone have some indications as to what and where I could measure?
Thanks

It may be beneficial to start your own debugging thread with pictures of your build.

 

[itchymusic]

It may be beneficial to start your own debugging thread with pictures of your build.

I'll do that, thanks