DIY bass amp

[6thplanet]

Got three of them completed, ran out of heatsink compound and the standoffs for the amplifiers. Should have all that this weekend.

 

[6thplanet]

Well I couldn't wait. I threw one together....





This one has the Bloodwood front panel, probably the densest of the woods I used. That said, it weighs 17.6lbs (bathroom scale).
My iPhone doesn't do the lighting justice. It's not a glaring as it makes it out to be.

Couldn't be more happy with the control lighting, gives it a nice glow.
I did the black amps with blue lighting, the snakeskins have red, and the tans have green.

 

[S-Bigbottom]

 

[hamertek98]

Sweet!

 

[B-string]

Awesome!

 

[bknop]

That is some nice work right there!

 

[6thplanet]

Thanks guys!!! It's really nice to finally see my vison come to fruition.

 

[6thplanet]

All are assembled except for one, the test mule. I'll have to disassemble it and do a bunch of steps to bring it up to where the rest of the bunch is.

Here's one of the tan ones...

...the front panel is Acacia, left over flooring from our house.

 

[6thplanet]

 

[beans-on-toast]

The wood fronts are reminiscent of TrainWreck amps made by Ken Fischer. Before the internet he used to send polaroids of his builds. They were unique and always interesting.

https://reverb.com/news/trainwreck-amps-a-history-of-ken-fischers-mythic-circuitry

 

[6thplanet]

Right on, that's pretty cool.

 

[Pep]

Great project.
It's kinda' like when I had a Yamaha Roadstar Warrior. Vance and Hines was making a custom exhaust system for many motorcycles but mine wasn't one of them. After speaking with them they weren't interested in building it so I did. I did a complete post of the build on another site and when it was complete I had guys coming out of the woodwork wanting me to build them for their Warriors. It was just too much work as I wasn't set up to do any production.

 

[6thplanet]

I just need a few people to come out of the woodwork and enjoy my creations.
I will throw out that if anyone is local to Louisville KY and would like to check one out, PM me.

 

[6thplanet]

Updated schematic with average voltages.

 

[fdeck]

I'm curious about running the heaters of the 12AX7's at 12 V DC. Aren't those rated for 12.6? Or maybe the difference is within spec.

 

[agedhorse]

I'm curious about running the heaters of the 12AX7's at 12 V DC. Aren't those rated for 12.6? Or maybe the difference is within spec.

Plenty close enough for amplifier applications ime.

 

[6thplanet]

I researched a bit on it, using a 12V regulator. Seems to be a common way to do it. The VHT amp I modeled after ran the first tube that way, obviously for noise reasons. The regulator has plenty of current capability to run two tubes, so that's how I chose to do it.

Tubes are conducting within 5-7 seconds.

 

[BoogieZK]

You can Add 2 diodes 0.3V on the ground (pin2) to elevate the voltage to 12.6V.
example:

 

[agedhorse]

You can Add 2 diodes 0.3V on the ground (pin2) to elevate the voltage to 12.6V.
example:

I think you will find a single diode to be between .6 and .7 volts however.

 

[6thplanet]

Aren't Schottky diodes in the .3V area? Maybe meant two of those?
Either way, it could be done, but not really necessary. Thanks for the suggestion.