PS3100 Resonators 2008

ericcoleridge · Joined: Jan 16, 2007 Posts: 889 Location: NYC

Yeah, I guess I chose my words poorly. Obviously, no one wants a graphic equalizer-- but rather, I was imagining something closer to the Moog Filter Bank module/String Filter/ Parametric EQ/ Etc.

I just don't know if there is any point in limiting the frequency range of the various stages of this design-- or if it would be a more functional design to leave it the way it is with three filters at full frequency range. I guess it depends on what one wants to use the design for. I don't think the extra cost of vactrols necessarily makes them a poor design choice for a parametric eq.

/mr · Posted: Tue Mar 18, 2008 10:27 am Post subject:

ericcoleridge · Joined: Jan 16, 2007 Posts: 889 Location: NYC

/mr · Posted: Tue Mar 18, 2008 11:33 am Post subject:

fonik · Posted: Wed Mar 19, 2008 2:27 am Post subject:

i finished the building docs for the 2nd run PCBs:
http://www.modular.fonik.de/pdf/PS3100.pdf

i will have no access to internet or email for the next 2 weeks! Shocked

we are moving and the provider is not able to move the wideband connection without downtime.
hopefully i will have some good news as soon as i am online again...

so have a nice one.

Tronato · Posted: Fri Mar 21, 2008 2:48 am Post subject:

Hello!

One for me please!

Thanks!

TRON

Peake · Posted: Sun Mar 23, 2008 12:18 pm Post subject:

I've always wanted 16 channels of VC BPF for resonation (fixed filters, unless using integrators, displease). One thought was to have a global CV input called Spread, which would, from a single CV, move all of the filters apart in frequency (the middle ones just a little, and the outer ones increasingly more and more, requiring trimmed inverting CV paths for half of the filters). Playing with the audio ins on the Andromeda, playing the 16 voice's filters via the keyboard and ribbon gives rise to this modular concept.

But now I'm reading that this design is only functional across half of the audio spectrum. Confused

mono71 · Posted: Mon Mar 24, 2008 7:15 pm Post subject:

Hi Matthias,

is there place for one PCB reservation ?

If yes, please add mine.

Thanks

Cheers

Gustavo.-

/mr · Posted: Tue Mar 25, 2008 8:23 am Post subject:

widdly · Posted: Tue Mar 25, 2008 7:13 pm Post subject:

I'd say it's much more than half the audio spectrum. 100Hz to 10kHz is more like 90% of the audio spectrum if you think in terms of octaves.

Filter formula would be nice. There are some formula for Single Op-Amp Bandpass Filter here.. http://ourworld.compuserve.com/homepages/Bill_Bowden/opamp.htm#bandpass.gif

.. but the topology looks a bit different from the ones here. Anyway I think those figures would be guesstimates considering the tolerance of vactrols.

/mr · Posted: Wed Mar 26, 2008 3:42 am Post subject:

/mr · Posted: Wed Mar 26, 2008 4:44 pm Post subject:

Cat-A-Tonic · Joined: Mar 24, 2008 Posts: 42 Location: Yokohama, Japan

I would like a PS3100 PCB please.

Master of Circles · Joined: Jun 27, 2007 Posts: 14 Location: Hamburg

as I wrote in the PM or was it an email??

Two Boards please.

fonik · Posted: Mon Mar 31, 2008 1:13 am Post subject:

i am online again. still don't have net access at home, though.

PCBs have arrived and i will populate and test one this week. we moved to our new home last week and there is still a lot of work to do. however i started to arrange my new S-DIY workspace!

thanks to you all for your patience.

fonik · Posted: Fri Apr 04, 2008 3:59 am Post subject:

finished the test PCB yesterday and it is resonating...

i will do some additional testing on weekend and review the original thread of the 1st run for additional info that might will be incorporated into the documentation.

await PMs containing payment info on monday. there are at least two projects going to be released this week on e-m (the buchla 281 clone will provide some nice functions for the resonators, i think) - so don't spend all your money on the weekends amusements Wink

/mr · Posted: Fri Apr 04, 2008 5:36 am Post subject:

fonik · Posted: Fri Apr 04, 2008 5:42 am Post subject:

yeah, i am realy keen on josh's b281 PCBs. he did an outstanding job on these. ...and my new cabinet will be filled faster then i wanted to...

fonik · Posted: Sun Apr 06, 2008 11:49 pm Post subject:

here are some pics of the new resonator:

the bare board
Posted Image, might have been reduced in size. Click Image to view fullscreen.

enough room for 500V silver mica caps
Posted Image, might have been reduced in size. Click Image to view fullscreen.

the populated PCB
Posted Image, might have been reduced in size. Click Image to view fullscreen.

testing

and last but not least my new workspace (i used to solder on my computers desk until now)
Posted Image, might have been reduced in size. Click Image to view fullscreen.

i will start to send out PMs later this day. i won't be able to PM everyone today, so just give me two days or three...

asafnetzer · Joined: Jun 16, 2007 Posts: 112 Location: Israel

Have just seen those pictures on flickr, looking great.
500V capacitors Shocked

/mr · Posted: Mon Apr 07, 2008 2:24 am Post subject:

fonik · Posted: Mon Apr 07, 2008 3:29 am Post subject:

these big caps just look so good. very impressing.

i've heard, the higher the voltage rating the lower the ESR. i don't think i would hear/experience any difference. in fact i actually don't know what difference i should or could experience Laughing

maybe one of the experts could chime in?

fonik · Posted: Tue Apr 08, 2008 4:05 am Post subject:

everyone who expressed interest in one or more PCBs should have recieved a PM now. if not, don't hesitate to contact me.

fonik · Posted: Sat Apr 12, 2008 12:24 am Post subject:

all PCBs are now spoken for. however i will start a waiting list in case not all ordered PCBs get sold in the end.

BTW the first PCBs reached destination.
i'd really like to see pictures of what you've done with them. i mean, last year i sold 100(!) Resonator PCBs and saw only 5 pictures of finished modules...

prophei · Posted: Sat Apr 12, 2008 5:28 am Post subject: