My stereo cutterhead build.

[sameal]

I don't have a name for it yet, i usually name things after they are built and functional.

Im also not looking to bring anything into production, there's plenty of that going on, i couldn't compete if i wanted too, and i don't wanna, because im a terrible buisnessman. Im in it purely to have fun, see if i can do it, and make a stereo cutterhead for myself.

Disclaimers aside, i have a lot of work to do. I move at probably a snails pace to some, but i usually have more then one audio project going on at a time.

Anyway, i found some aluminum pieces i think might work, and an amp that probably won't, but i want to try it anyway. The amp is a bogen E-75, that might have been used as a boat anchor at some point.

[sameal]

She so nasty.

[sameal]

Dim bulb, bad power switch, ungrounded cable, dead pilot light, no surprises

[sameal]

Oh no

[sat159p1]

Cutting head look very promising! good luck and post something here when its done!

[sameal]

Thanks! Not bad for found parts!

But the hard work starts now, so we shall see. I think i might try a few different drivers, depending on the materials im able to source.

[sameal]

I'm back to playing with this idea in-between other projects on hold for parts.

I think I got the v-spring mount idea kinda nailed down and the pushrods for the speakers. I found these military connecter pins that fit into the candy funnels perfectly, which I think I'll dab them in some silicone and press fit them. I thought about a feedback coil, but I'm not sure where to start on that.

I figured I'd just cut a half moon out of the aluminum bit I put on the exciter bracket and mount the v spring with some machine screws into the aluminum.

[farmersplow]

You already have the aluminum angles. Also the speakers and a beautiful aluminum funnel.
OK, the amp needs some affection and love, but then maybe it can give some love back and do what it was born to do: Amplify. And if he no longer wants, there is always the second education as a boat anchor.

I wish you much fun and joy on your journey to the cutting head!
Keep us posted, I'm already curious how your next steps look like.


P.S.: When I was starting out, a smart and experienced markrob told me to leave the feedback coil alone for now. Gather experience and then take further steps. I did not want to listen to him! (unfortunately ). Then I started from scratch and now after two years (6000 hours later) it's my turn to experiment with feedback.

[farmersplow]

P.S.: When I was starting out, a smart and experienced markrob told me to leave the feedback coil alone for now. Gather experience and then take further steps. I did not want to listen to him! (unfortunately ). Then I started from scratch and now after two years (6000 hours later) it's my turn to experiment with feedback.
[/quote]

... or do you already have experience with feedback? - then forget my advice

[sameal]

I haven't touched the amp in awhile. I might just use a solid state instead. I figured the v-spring and pushrod part was first.

I have no experience with feedback. Just some reading. I haven't wound a coil either.

[sameal]

Might have to name this one Frankenstein's monster, what with the bolts all sticking out.

Had some failed aluminum threading on the mount block, which I should know better, but I did anyway. So that'll have to get fixed. I'm thinking of just popping some rivet nuts in there instead of cutting a whole new steel plate. The bolt holes all lined up great so something HAD to go wrong. I'm thinking of picking up a disc/belt sander to clean up all the rough edges.

[sameal]

Revised some build points, rivnuts work way better then tapping aluminum, but the quality of the threads in them leave much to be desired. I also should have measured the mounting holes I put in, as they are starting to get in the way of one another. But I guess that's what version 2 is for.

On to the hard part!

[CHoffman]

FWIW, I like Helicoils when I have threading problems, but I also use a lot of PEM nuts as they make every style imaginable.
Amazon, Digikey and Mouser are all good sources.