Caruso Prototype

Post: # 14821Unread post **blacknwhite** Mon May 09, 2011 11:48 pm

Hi Flo,

Hope all's well; I'm still ready to buy, whenever you're ready to sell (as with everyone else here, I'm sure)...

- Bob

Post: # 14827Unread post **andybee** Tue May 10, 2011 6:59 am

I meet flo saturday, I ask him a bit about what´s going on,
and post it here, if he is fine with it!

Post: # 14838Unread post **GrobbingThistle** Tue May 10, 2011 3:08 pm

I, too, am quite interested

Post: # 14842Unread post **djlithium** Tue May 10, 2011 8:59 pm

Yes yes.

Post: # 14843Unread post **flozki** Wed May 11, 2011 3:46 am

yes.just some slight but important progress.

drivecoils under test now....

still install & redesign my workshop so at moment i can not work, as i was used to work buut it gets better every day....
and
this is quite off topic now
i was a little absorbet with other, also analog gear.hehe. big children.big toys...but feedback is also very important.

http://vimeo.com/channels/synkie
http://hackaday.com/2011/05/08/synkie-the-modular-synth-for-video/

http://blog.makezine.com/archive/2011/04/synkie-a-modular-open-source-analog-video-processor.html

Post: # 14847Unread post **bancho** Wed May 11, 2011 5:41 am

TRUE analog VJ-ing!!!! TOTALLY RAD!!!!!!

Post: # 14848Unread post **Jordiphon** Wed May 11, 2011 6:08 am

Oh, that looks very nice!

Post: # 14849Unread post **petermontg** Wed May 11, 2011 7:15 am

cool. ill take an alu for a presto flo might take two but one for the moment.

will you pm details for payment when your ready flo

Post: # 14851Unread post **JayDC** Wed May 11, 2011 10:27 am

me 2.. I'll take one..

Post: # 14862Unread post **JuanPabloCuervo** Thu May 12, 2011 2:39 pm

flozki wrote:right now i made 2 brass , 1 bronce, 1 aluminum and 1 plexi-glass headblocks.

What kind of Brass ?
what kind of Bronze ?

i mean:
recycled?
zinc % ? Lead? lead free? Tin % ? silver ? iron ? phosphor?
nickel ? silicon?

UNS number?
http://en.wikipedia.org/wiki/List_of_copper_alloys

Post: # 14863Unread post **JuanPabloCuervo** Thu May 12, 2011 2:49 pm

flozki wrote:i had many requests about the exact dimensions of the head and also how to fix on a particular machine....

so here you find the blueprints of the caruso mainblock.
all necessary info is on it to find a solution to fix a caruso on your lathe.

this part wont change that much anymore. so you can prepare..

standard will be a (neumann) mount with 10mm (9.98mm exact) bar on the back of the head.

check.

or get the pdf:

http://www.floka.com/caruso/caruso_outer_dimensions.pdf

flozki wrote:the bar is for fitting on a neumann lathe.ou can attach whatever you want.
use the drawings.... and check how to fit...

anyone has the .pdf ?

thanks.

Post: # 14870Unread post **piaptk** Fri May 13, 2011 12:27 pm

How would I connect the pin connector on top to an amplifier? Are there other input options (standard speaker cable?) available?

Post: # 14871Unread post **opcode66** Fri May 13, 2011 2:49 pm

It is a standard DSub socket on top (female if memory serves). That means you would buy a mail DSub and and wire the terminal pins appropriately so as to connect your amps' drive and feedback as well as the current for a heating wire.

Post: # 14873Unread post **JayDC** Fri May 13, 2011 7:30 pm

opcode66 wrote:It is a standard DSub socket on top (female if memory serves). That means you would buy a mail DSub and and wire the terminal pins appropriately so as to connect your amps' drive and feedback as well as the current for a heating wire.

I think its more of a clearance issue. Presto 6's have little room above the head..

I'd need to look at the drawing again, and whip out the ruler, maybe a right angle Dsub adapter will work. If not, I'd just lop off the "nose" on the presto w/ a hacksaw, it would be worth it i think..

If flo wires it with a little slack, the Dsub could be removed, and direct wire connections made.. Maybe an option from the factory?

Post: # 14874Unread post **piaptk** Fri May 13, 2011 11:00 pm

Would it be possible to use it without feedback? I still haven't exactly figured out what the hell feedback is and how to use it, despite reading all the threads about it.

Post: # 14877Unread post **JayDC** Sat May 14, 2011 3:16 am

piaptk wrote:Would it be possible to use it without feedback? I still haven't exactly figured out what the hell feedback is and how to use it, despite reading all the threads about it.

I would assume dat u just need to NOT plug in the feedback wires.. Feedback is not exactly rocket science, almost.. it's like a bias current to keep tings in check..

Post: # 14883Unread post d Sat May 14, 2011 7:20 am

If you have a Disk Recording Vol1 the red book then you can find there about feedback. Basically I don't think you will be able to use it without feedback, otherwise you can even damage the head. Feedback does a big job when used propertly and as I read here the Caruso will come with special preamp built along with the head. So you have to use it.

The concept is quite simple of feedback, and I have seen here some posted topics about it. There are some of explanations here....

Do

Post: # 14885Unread post **markrob** Sat May 14, 2011 10:59 am

piaptk wrote:Would it be possible to use it without feedback? I still haven't exactly figured out what the hell feedback is and how to use it, despite reading all the threads about it.

Hi,

You might be able to, but you will need a very radical EQ to make that happen. The open loop response of a moving coil head is very different than the typical Presto, Audax, or Grampian you are used to. The open loop velocity response looks like an inverted V with the peak at the system resonance (in the 1-2Khz range). The slope is +6db/oct below the resonance and -6db/oct above. You will also have to deal with taming the resonance peak depending on how well damped it is. Finally, there will be some deviations from the textbook response that you will need to deal with. It is also likely, that the response will vary under actual load when cutting vs. on the bench. You can use the feedback coil to monitor the output of the head and develop the correct EQ. You must also add in the RIAA curve after the head is linearized to flat response vs. velocity. You may be able to combine the two and simplify the process.

If you don't have the tools to do this, I'd strongly urge you to purchase any preamp supplied by Flo as this will be designed to get the most out of the head. Hope this helps.

Mark

Post: # 14887Unread post **piaptk** Sat May 14, 2011 3:33 pm

Cool.. I would actually use this on my 8C, which has plenty of vertical clearance. Just couldn't figure out how to input the music, looking at the pics, but if he is selling a preamp that controls the feedback, I'd definitely pick that up as well.

Post: # 14895Unread post **TotalSonic** Sun May 15, 2011 6:20 am

piaptk wrote:Cool.. I would actually use this on my 8C, which has plenty of vertical clearance. Just couldn't figure out how to input the music, looking at the pics, but if he is selling a preamp that controls the feedback, I'd definitely pick that up as well.

From my understanding based on what Flo said previously is he will be including with the head a PCB for the pre-amp along with schematics/parts list so that you could build the front end IRIAA encoder/feedback controller in your own chassis.

Best regards,
Steve Berson

The Secret Society of Lathe Trolls

Caruso Prototype

Re: caruso outline. dimensions and drawings