SlewMaster Builds

[Harry3]

Nice.
Are you going to install a fan between the heatsinks?

 

[evanc]

I’m still woodworking but I’ve been fighting some health issues for well over a year and been on disability for nearly six months now.

2 channels, seven pairs per channel. +/- 87Vdc.

 

[jwilhelm]

Sorry to hear about the health issues! Does this mean you had to give up the racing too?

I see what you've built now, two sawed off Ark Welder boards for extra outputs. Looks good!

 

[evanc]

I have gotten out for a few track days but only for fun. It is eye opening to people when my civic with minimal work (big brakes stiff springs and soft tires) is faster than new corvettes.

 

[evanc]

Photo evidence

 

[jwilhelm]

I always found the Corvettes to be too heavy in the rear for tight cornering. Your vintage of Civic worked great. The new SI's aren't as good, they push terribly.

 

[evanc]

My car is very stiff in the rear. Big sway bar and 12 kg/mm springs. That plus some willingness to trail brake and really pitch the car in makes for a very balanced and fast package.

 

[evanc]

Nice.
Are you going to install a fan between the heatsinks?

Yes. There is a fan in the rear of the enclosure between the heat sinks. Running on 5 volts it’s silent and keeps everything cool.

 

[evanc]

Photo

 

[Harry3]

Awesome

 

[von Ah]

That’s an uberawesome amp, Evan. Nice casework. ‘Seven Pairs of Sankens’ sounds like the title of a Spaghetti Western.

...The steely-eyed stranger parks his dusty sleeper Civic outside the saloon with an e-brake 180 flourish. As the dust settles, he tosses a Spanish Doubloon to the kid mending the other horses outside and pushes through the swinging louvered doors. The kid catches the glinting coin, agape.

All eyes on him, the stranger squints toward the bar and suggests, “Mezcal.” His voice is as dry as the bits of gravel thrown off burning racing slicks on a hairpin turn of the Imola Circuit.

As he confidently strides to the bar, he points toward the upright player piano tinkling away a Mexicali waltz. “There are some in these parts that say there’s Seven Pairs of Sankens driving the sweet music in here...”

I hope the health issues improve.

 

[evanc]

Thanks guys.

 

[thimios]

I’ve been laying low lately (work and health issues) but wanted to use some parts and materials I had on hand.

Very well done evanc!
I wish we still had Ostriber with us.
I hope that he will come back a day or we will to have news from him at least!

 

[evanc]

Thanks thimios. Sorry I’ve been so spotty. Yes it would be nice to see Ostripper. He is very sharp but also eccentric.

 

[evanc]

Distortion 1,10,100,200 watts. Stopped at 200 watts... the dummy load was getting awfully hot. Sorry for the crappy pictures of the computer.

 

[evanc]

And uploading from my phone I’m still to incompetent to get the photos displayed correctly

 

[Freecrowder]

Was told about this amp design from others. I'm looking for at minimum 300-400W/channel to drive maggies. Is this the right design? If so is the the correct thread or is there a different one to start from? Are there boards/gerbers available?

 

[jwilhelm]

There are a couple different threads going on this amp. I think I still have some output boards and a few of the input boards. There are others with boards available too. There are Gerbers available throughout the threads.

Here's the main thread. Slewmaster - CFA vs. VFA "Rumble"

Here's the group buy thread. SlewMaster Project Boards

 

[Freecrowder]

Thanks again J. How much power can this design support?

 

[jwilhelm]

If you go with double die output devices it should safety produce around 500W @4R with enough heat sink