Bandmaster Ultra Phonix Amp

[rccolgan]

Corrected schematic.

Any other corrections? Is there some consensus on the 47k slope resistors vs the 33k & 100k?

With respect, 10thtx

Awesome work! I am going to do the exact mod. I believe the schematic is missing the 47pf cap in the phase inverter. I'll comb over in more detail as well.

[m.alexander]

Corrected schematic.

Any other corrections? Is there some consensus on the 47k slope resistors vs the 33k & 100k?

With respect, 10thtx

Awesome work! I am going to do the exact mod. I believe the schematic is missing the 47pf cap in the phase inverter. I'll comb over in more detail as well.

i my modded i use 47pf cap in phase inverter , and 47k slope resistor

[rccolgan]

Hot off the press and John Mayer is now playing with it. An interesting looking UltraPhonix Bandmaster by Dumble. Around the 6 min mark.

https://youtu.be/GjolYaYTMac?si=mqOms4h2bfO9jcMs

Pics

https://photos.app.goo.gl/kExgxFhTYKBXq2jj6

Also in the pics seem to have another Dumble in a Fender 75 Chassis? Vox cloth

[hitchcaster]

the pics are from Emerald City Guitars youtube video... and in the video they said it was a boutique amp build, the vox cloth one. and also in the video he was gifted a dumble pignose.

[rccolgan]

I was away for a while so I couldn't upload the photos directly. Looks pretty cool with the alligator grill! Anyone know the source of these knobs? It looks like it has G L in between the 1-10. I dug around the internet for 3 hours and came up with nothing. The custom UltraPhonix badge is highly likely made by DropLight Industries https://www.droplightind.com/products/p/deluxe-badge and scaled down to around 6" in length. I ordered a standard size one and it was a little larger than the one you see in the pics so I ordered another run. I highly recommend them!

It seems in the later years of Dumble's life, he was doing more modded Fenders (Clapton, Kenny Wayne Sheppard, etc) versus the chassis fabrication route.

[didit]

Hello --

In their opening era G&L made some amplifiers and other gear. Not many. Some quite similar in packaging style to MusicMan. Speculating this amplifier was a built using one those as the donor. Look out for an example with that style of knob. Given production numbers likely to be a deep search, perhaps even fruitless.

..

[rccolgan]

Hello --

In their opening era G&L made some amplifiers and other gear. Not many. Some quite similar in packaging style to MusicMan. Speculating this amplifier was a built using one those as the donor. Look out for an example with that style of knob. Given production numbers likely to be a deep search, perhaps even fruitless.

..

Interesting! It's totally possible and to that point, I might quit the search for the exact knobs and go for new style ones. Very interesting about early G & L and possibility that the knobs could be one of them. I learned something! Thanks!

[Guy77]

Hello --

In their opening era G&L made some amplifiers and other gear. Not many. Some quite similar in packaging style to MusicMan. Speculating this amplifier was a built using one those as the donor. Look out for an example with that style of knob. Given production numbers likely to be a deep search, perhaps even fruitless.

..

Interesting! It's totally possible and to that point, I might quit the search for the exact knobs and go for new style ones. Very interesting about early G & L and possibility that the knobs could be one of them. I learned something! Thanks!

Hi Ryan, this maybe what you are looking for..

https://www.banzaimusic.com/Dial-knob-DKN-112-NUM.html


Cheers
Guy

[rccolgan]

Hello --

In their opening era G&L made some amplifiers and other gear. Not many. Some quite similar in packaging style to MusicMan. Speculating this amplifier was a built using one those as the donor. Look out for an example with that style of knob. Given production numbers likely to be a deep search, perhaps even fruitless.

..

Interesting! It's totally possible and to that point, I might quit the search for the exact knobs and go for new style ones. Very interesting about early G & L and possibility that the knobs could be one of them. I learned something! Thanks!

Hi Ryan, this maybe what you are looking for..

https://www.banzaimusic.com/Dial-knob-DKN-112-NUM.html


Cheers
Guy

Perfect. Yes, solid alternative! And definitely easier to find Thank you! I have parts flying in from everywhere for this build