The latest from Hammertone Enterprises

[dhuebert]

Here's a little something I've been working on for almost 2 years. See if you can figure out what it does!



Don

[jbrew73]

looks like a preamp that blends from clean to overdrive.

[Greg Smith]

+1 on the preamp that blends between OD and clean. You've also got an NFB loop on the V3A stage with a lowpass filter. Is that to remove fizz from the OD channel?

Nice graph paper!

Greg Smith
Ottawa ON

[dhuebert]

It's a mixer, the low pass filter is to keep the feedback loop gain low at high frequencies, it's good design that I learned in my op amp days. There is an error in the schematic tho; the 330pF cap should be 33pF.

You can find the graph paper at Lee Valley.

[Geek]

Hmmm, I did a similar (in hybrid) for my bass. Sounded great!

Bet this sounds much better being all tube.

Cheers!

[dhuebert]

looks like a preamp that blends from clean to overdrive

Technically, it is not a preamp in that the output signal is the same amplitude as the input. Observe:




Don

[Vince]

It sure is fun watching you guys who know what you're doing!!! I sure appreciate your words of wisdom!! Have a great day, Vince

[cw]

this would work nice in your Viper (toolbox).

[dhuebert]

I am thinking of incorporating it into all future builds. I have something very exciting in mind for my next build. A couple of people have asked about a guitar head and I have just the box to put it in:







I'm thinking 50 watts, a couple of 6L6s...

Don

[EWBrown]

I have a similar old case in the cellar. I was thinking "power supply" but yours is a much more noble appl;ication.

BTW, be wary of that "transformer infestation" on the floor - they can replicate like hampsters, and take over the house before you even know it! ;-) I know it's true, I have all sorts of oddball trannies which I don't remember where / whence they came from.

/ed B

[cw]

transformer infestation is almost like gnome encroachment in your back yard from your neighbors yard.

it is easily handled with a self feeding/extracting 1500 horse power chipping/shredding mill hammer (i might suggest Ingersol). ;-)

[dhuebert]

That sounds like a Tim Taylor device!

[Geek]

That sounds like a Tim Taylor device!

Uhrrr, uhrrr... powerrrrrr

Cheers!

[dhuebert]

So I finally decided to put the distortion box on a proper chassis:






It's been a while since I've done this, so I hope not too many mistakes. The Bass-O-Matic in the background is for reference, it is one of the quietest amps I've ever built so I want to replicate it as closely as possible. Even after all these years I still don't know what makes one amp buzz and another quiet, so I try to copy my successes and hope for the best.

Don

[dhuebert]

Don