electro-music.com   Dedicated to experimental electro-acoustic
and electronic music
 
    Front Page  |  Radio
 |  Media  |  Forum  |  Wiki  |  Links
Forum with support of Syndicator RSS
 FAQFAQ   CalendarCalendar   SearchSearch   MemberlistMemberlist   UsergroupsUsergroups   LinksLinks
 RegisterRegister   ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in  Chat RoomChat Room 
go to the radio page Live at electro-music.com radio 1 Please visit the chat
  host / artist show at your time
today> Sorry, postponed until next week Chez Mosc
 Forum index » DIY Hardware and Software » Thomas Henry designs
TH-201 "Mankato" PCBs available
Post new topic   Reply to topic Moderators: Scott Stites
Page 3 of 7 [156 Posts]
View unread posts
View new posts in the last week
Mark the topic unread :: View previous topic :: View next topic
Goto page: Previous 1, 2, 3, 4, 5, 6, 7 Next
Author Message
etaoin



Joined: Jun 30, 2005
Posts: 761
Location: Utrecht, NL

PostPosted: Thu Aug 09, 2007 6:45 am    Post subject: Re: TH-201 "Mankato" PCBs available
Subject description: Polystyrene caps
Reply with quote  Mark this post and the followings unread

Quote:
Next best choice would probably be polyester, and then mylar or other "film" caps. Worst would be ceramic.


Shouldn't polypropylene be somewhere between polystyrene and polyester as well? I've seen those recommended as par to polystyrene for VCO timing caps. I have one in both my CGS VCO and ASM 'ultra' VCO. Ray Wilson uses silver mica in his VCO.

And why do I have so many different VCOs?

_________________
http://www.casia.org/modular/
Back to top
View user's profile Send private message Visit poster's website MSN Messenger
Tim Servo



Joined: Jul 16, 2006
Posts: 924
Location: Silicon Valley
Audio files: 11

PostPosted: Thu Aug 09, 2007 3:18 pm    Post subject: Re: TH-201 "Mankato" PCBs available
Subject description: Polystyrene caps
Reply with quote  Mark this post and the followings unread

Etaoin wrote:
Quote:
Next best choice would probably be polyester, and then mylar or other "film" caps. Worst would be ceramic.


Shouldn't polypropylene be somewhere between polystyrene and polyester as well? I've seen those recommended as par to polystyrene for VCO timing caps. I have one in both my CGS VCO and ASM 'ultra' VCO. Ray Wilson uses silver mica in his VCO.

And why do I have so many different VCOs?


Yup, forgot about polypropelene. Those are almost as good as polystyrene, and for a VCF they should be just fine. Silver Mica is also good, although they tend to be expensive from what I recall. Remember that a VCO only needs one timing cap, while the Mankato (and other 4-pole filters) need four timing caps.

You have so many VCOs because they're cool and they make noise! However, I'll provide my address if you feel you have too many. Wink

Tim (can you ever have too many VCOs?) Servo
Back to top
View user's profile Send private message
davebr



Joined: Jun 09, 2007
Posts: 198
Location: portland, or

PostPosted: Thu Aug 09, 2007 10:15 pm    Post subject: Reply with quote  Mark this post and the followings unread

I bought SMT 1K tempco's a Digikey and mounted two directly on the SSM2164. Details at
http://modularsynthesis.com/magicsmoke/mse.htm

ENDIF wrote:


My magnificent blue slab arrived a few days ago, and I'm currently knee deep in building it, just gotta find me a 2k tempco.. pesky things.
Back to top
View user's profile Send private message
softfin



Joined: Oct 11, 2006
Posts: 271
Location: Far in the north
Audio files: 1

PostPosted: Fri Aug 10, 2007 4:20 am    Post subject: SSM2164s Reply with quote  Mark this post and the followings unread

I'm about to start populating two Mankato boards, but noticed that my stock of SSM2164 chips is running low...only 1 left.
So, if anyone knows a good source (preferably in Europe) where to get these for a decent price, please drop a message Smile
Back to top
View user's profile Send private message
etaoin



Joined: Jun 30, 2005
Posts: 761
Location: Utrecht, NL

PostPosted: Fri Aug 10, 2007 5:31 am    Post subject: Reply with quote  Mark this post and the followings unread

davebr wrote:
I bought SMT 1K tempco's a Digikey and mounted two directly on the SSM2164. Details at
http://modularsynthesis.com/magicsmoke/mse.htm


Is using two 1k tempcos where a 2k tempco is specified possible in general? I have plenty of 1k tempco's, but no 2k tempco's left.

_________________
http://www.casia.org/modular/
Back to top
View user's profile Send private message Visit poster's website MSN Messenger
Usine Karate



Joined: Jun 09, 2007
Posts: 64
Location: Hackney Wick

PostPosted: Fri Aug 10, 2007 3:45 pm    Post subject: Reply with quote  Mark this post and the followings unread

Just received boards, they look really good, thanks!

Was just wondering if it would be possible to power the Mankato from a 12v supply? And if so what, if any, modifications would be necessary, I noticed that Bugbrand (if you're out there) was running his from 12v, any ideas on modifications?

Ta!
Back to top
View user's profile Send private message
davebr



Joined: Jun 09, 2007
Posts: 198
Location: portland, or

PostPosted: Fri Aug 10, 2007 8:50 pm    Post subject: Reply with quote  Mark this post and the followings unread

Just finished my Mankato module. Wow, what a lot of range. I'll have to decide whether to leave it or perhaps trim it down a bit. I used a Stooge bracket for the PCB, Loffink chiclets for the potentiometers, FPE panel, and Vishay 149/248 potentiometers. You can just see the SMT tempcos on the SSM2164. What a neat design. Now to go play ...

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


davebr wrote:
I bought SMT 1K tempco's a Digikey and mounted two directly on the SSM2164. Details at
http://modularsynthesis.com/magicsmoke/mse.htm
Back to top
View user's profile Send private message
Scott Stites
Janitor
Janitor


Joined: Dec 23, 2005
Posts: 4127
Location: Mount Hope, KS USA
Audio files: 96

PostPosted: Sat Aug 11, 2007 6:40 am    Post subject: Reply with quote  Mark this post and the followings unread

Quote:
Thomas Henry,

If you are out there........
I'm also a 19" rack panel head. Have you designed a 19" rack panel for the Mankato filter? I'd be curious to see your design as I imagine others on the forum would. Gotta milk as much input before you're back to class!


Hey Antman,

Thomas is out there - really out there, in fact. He's in Kansas on vacation, and I expect him to drop by here in an hour or two. I've met with him the last couple of nights, and it's been a really enjoyable experience. I'll ask him about the panel design - I bet he's got one.

There should be time for that before the townspeople get him properly tarred, feathered, and mounted on the rail Laughing

Take care,
Scott

_________________
My Site
Back to top
View user's profile Send private message
fonik



Joined: Jun 07, 2006
Posts: 3950
Location: Germany
Audio files: 23

PostPosted: Sat Aug 11, 2007 7:14 am    Post subject: Reply with quote  Mark this post and the followings unread

Etaoin wrote:
davebr wrote:
I bought SMT 1K tempco's a Digikey and mounted two directly on the SSM2164. Details at
http://modularsynthesis.com/magicsmoke/mse.htm


Is using two 1k tempcos where a 2k tempco is specified possible in general? I have plenty of 1k tempco's, but no 2k tempco's left.

yes, i think so, and using 3300ppm would be even better that 3500 FWIK.

_________________
Posted Image, might have been reduced in size. Click Image to view fullscreen.
cheers,
matthias
____________
Big Boss at fonitronik
Tech Buddy at Random*Source
Back to top
View user's profile Send private message Send e-mail Visit poster's website
Evan



Joined: Aug 04, 2007
Posts: 35
Location: Australia

PostPosted: Sun Aug 12, 2007 12:05 am    Post subject: Reply with quote  Mark this post and the followings unread

fonik wrote:
yes, i think so, and using 3300ppm would be even better that 3500 FWIK.

So, in general, the lower the ppm value, the better?

There are some 3000ppms (I think) available locally.
Back to top
View user's profile Send private message
sneakthief



Joined: Jul 24, 2006
Posts: 569
Location: Berlin

PostPosted: Sun Aug 12, 2007 3:36 am    Post subject: Reply with quote  Mark this post and the followings unread

the theoretical ideal for a thermistor in a VCO is 3300ppm.
_________________
Sneak-Thief - raw electrofunk
Back to top
View user's profile Send private message Visit poster's website
Thomas Henry



Joined: Mar 25, 2007
Posts: 298
Location: Southern Minnesota
Audio files: 2

PostPosted: Wed Aug 15, 2007 8:29 pm    Post subject: Reply with quote  Mark this post and the followings unread

Hello Antman,

antman49443 wrote:

I'm also a 19" rack panel head. Have you designed a 19" rack panel for the Mankato filter? I'd be curious to see your design as I imagine others on the forum would. Gotta milk as much input before you're back to class!


I did do a panel three years ago for the prototype. I searched my decrepit computer, but only found a corrupted file for it. So I guess the answer is "no." Sorry.

Say, when I was traveling the byways of Kansas last week it occurred to me that we crossed paths a decade ago. I finally placed the name with the project. You were working on a standalone Soundblaster unit for MIDI use. I remember I was absolutely swamped keeping MAP afloat and wasn't able to follow up on your ideas. Anyway, is that still a good project, or has time evaporated the surplus market for what you were doing? It sounds really neat.

Thomas Henry
Back to top
View user's profile Send private message
Tim Servo



Joined: Jul 16, 2006
Posts: 924
Location: Silicon Valley
Audio files: 11

PostPosted: Wed Aug 15, 2007 9:43 pm    Post subject: TH-201 "Mankato" PCBs available
Subject description: 12V Mankato
Reply with quote  Mark this post and the followings unread

Usine Karate wrote:
Just received boards, they look really good, thanks!

Was just wondering if it would be possible to power the Mankato from a 12v supply? And if so what, if any, modifications would be necessary, I noticed that Bugbrand (if you're out there) was running his from 12v, any ideas on modifications?

Ta!


Hey There,

Yes, you can run a Mankato on ±12V. The output levels will be lower (when oscillating, the sines will probably be closer to ±4V than ±5V), but that will be the most noticeable effect. Also, I would definitely not use PT1 and PT2 on a 12V system (replace them with jumpers or ferrites). They'll drop the supply rails to the chip too low. I think the V/Oct trim will still have enough range, so you're okay there. Of course, as with any system, you don't want to accidentally run a 15V signal into it because that could potentially damage the op amps.

Hope this helps!

Tim (Mankato wrangler) Servo
Back to top
View user's profile Send private message
vtl5c3



Joined: Sep 08, 2006
Posts: 425
Location: PDX
Audio files: 13

PostPosted: Thu Aug 16, 2007 1:11 pm    Post subject: Reply with quote  Mark this post and the followings unread

Hi Tim,

Have you replenished your board stock for the Mankato filter?

R.
Back to top
View user's profile Send private message
Tim Servo



Joined: Jul 16, 2006
Posts: 924
Location: Silicon Valley
Audio files: 11

PostPosted: Thu Aug 16, 2007 2:11 pm    Post subject: TH-201 "Mankato" PCBs available
Subject description: Board stock
Reply with quote  Mark this post and the followings unread

vtl5c3 wrote:
Hi Tim,

Have you replenished your board stock for the Mankato filter?

R.


Accoording to Fed Ex tracking, they should be here Friday / Monday. This incoming batch is half sold out, so that leaves us about 25 boards. If you've already placed an order, then you're all set. Hopefully I will still have a few to sell at AH Cali in a few weeks!

Tim (not bored of boards) Servo
Back to top
View user's profile Send private message
Usine Karate



Joined: Jun 09, 2007
Posts: 64
Location: Hackney Wick

PostPosted: Thu Aug 16, 2007 3:56 pm    Post subject: Re: TH-201 "Mankato" PCBs available
Subject description: 12V Mankato
Reply with quote  Mark this post and the followings unread

Also, I would definitely not use PT1 and PT2 on a 12V system (replace them with jumpers or ferrites).

Very Happy

Thanks for the info Tim. That works out well for me cos I have no idea what these are! I'll stick some ferrites in and see how she blows.
Back to top
View user's profile Send private message
Tim Servo



Joined: Jul 16, 2006
Posts: 924
Location: Silicon Valley
Audio files: 11

PostPosted: Thu Aug 16, 2007 6:04 pm    Post subject: TH-201 "Mankato" PCBs available
Subject description: 2K tempcos available
Reply with quote  Mark this post and the followings unread

By the way,

Magic Smoke has ordered a whole big buncha 2K tempcos and they'll be here next week!

They are 2K 1/4W 2% 3500ppm... in case you were wondering Wink

The prices are:
1 $3.50 +shipping (see below)
2 to 5 $3.00ea +shipping
5 or more $2.75ea +shipping

Shipping for any quantity up to 10 pieces is $1.50US/Canada, $2.50 EU/UK/Australia. If you order up to 10 pieces with a Mankato PCB, then the shipping will the same as the board alone. If you need more than 10 pieces, drop us a line and we'll figure it out. As always, we take PayPal to magsmoke@gmail.com. Thanks for the bandwidth, now get back to soldering!

Tim (or get back to breadboarding) Servo
Back to top
View user's profile Send private message
Coriolis



Joined: Apr 11, 2005
Posts: 616
Location: Stilling, Denmark

PostPosted: Mon Aug 20, 2007 7:27 am    Post subject: Reply with quote  Mark this post and the followings unread

Now THAT is a good deal!
Can you add some to my pcb order (assuming you haven't sent the boards to day)?

C
Back to top
View user's profile Send private message Visit poster's website
3vcos



Joined: Oct 26, 2006
Posts: 106
Location: California

PostPosted: Mon Aug 20, 2007 10:54 am    Post subject: Reply with quote  Mark this post and the followings unread

Looks like the BOM for the filter is gone and its not on the website. I'd like to have a look before I buy a Mankato. Any chance of reposting it?
Back to top
View user's profile Send private message
Tim Servo



Joined: Jul 16, 2006
Posts: 924
Location: Silicon Valley
Audio files: 11

PostPosted: Mon Aug 20, 2007 11:42 am    Post subject: TH-201 "Mankato" PCBs available
Subject description: 2K Tempcos
Reply with quote  Mark this post and the followings unread

Coriolis wrote:
Now THAT is a good deal!
Can you add some to my pcb order (assuming you haven't sent the boards to day)?

C


Absolutely! Just got the new batch of boards, so they'll start shipping in the next few days. Just PayPal us for how many Rs you want (cost of the Rs only, the shipping is no extra cost when included with a board order).

And thanks!

And VERY GLAD E-M IS BACK UP!


Tim (just a happy kind of guy) Servo
Back to top
View user's profile Send private message
Tim Servo



Joined: Jul 16, 2006
Posts: 924
Location: Silicon Valley
Audio files: 11

PostPosted: Mon Aug 20, 2007 12:02 pm    Post subject: TH-201 "Mankato" PCBs available
Subject description: TH-201 Rev03 BOM
Reply with quote  Mark this post and the followings unread

3vcos wrote:
Looks like the BOM for the filter is gone and its not on the website. I'd like to have a look before I buy a Mankato. Any chance of reposting it?


No problemo. Here is the Parts List for Rev03 Mankato boards. Let me know if you have any questions.


Tim (da BOM) Servo

(edited 21-August for suggested value of C15)


TH-201-03-Parts List.pdf
 Description:
Mankato Rev03 Parts List 21-August-2007

Download
 Filename:  TH-201-03-Parts List.pdf
 Filesize:  592.95 KB
 Downloaded:  402 Time(s)


Last edited by Tim Servo on Wed Aug 22, 2007 1:08 am; edited 1 time in total
Back to top
View user's profile Send private message
fonik



Joined: Jun 07, 2006
Posts: 3950
Location: Germany
Audio files: 23

PostPosted: Tue Aug 21, 2007 10:57 am    Post subject: Reply with quote  Mark this post and the followings unread

i am populating the PCB tonight and stumbled over C15. the BOM states three values for that cap: 10pf, 15pf or even 22pf. what is that about? should i stay with the 10pf as for the other caps?
_________________
Posted Image, might have been reduced in size. Click Image to view fullscreen.
cheers,
matthias
____________
Big Boss at fonitronik
Tech Buddy at Random*Source
Back to top
View user's profile Send private message Send e-mail Visit poster's website
Tim Servo



Joined: Jul 16, 2006
Posts: 924
Location: Silicon Valley
Audio files: 11

PostPosted: Tue Aug 21, 2007 11:20 am    Post subject: TH-201 "Mankato" PCBs available
Subject description: C15 value
Reply with quote  Mark this post and the followings unread

fonik wrote:
i am populating the PCB tonight and stumbled over C15. the BOM states three values for that cap: 10pf, 15pf or even 22pf. what is that about? should i stay with the 10pf as for the other caps?


My bad! That SHOULD say "optional, can use 10pF." Thomas' original design had a 22pF in that position, but I haven't noticed any difference with a 10pF in there. This allows you to buy one less part value. I'll fix that and repost the BOM. Thanks!


Tim (fixin' the BOM, Boss!) Servo
Back to top
View user's profile Send private message
fonik



Joined: Jun 07, 2006
Posts: 3950
Location: Germany
Audio files: 23

PostPosted: Wed Aug 22, 2007 4:03 am    Post subject: Reply with quote  Mark this post and the followings unread

thanks for your quick reply, tim.

next question: if i'd decided to use only 4 outputs of the mankato, which one would you recommend from a personal point of view? maybe somebody already mentioned this but i probably missed it.

_________________
Posted Image, might have been reduced in size. Click Image to view fullscreen.
cheers,
matthias
____________
Big Boss at fonitronik
Tech Buddy at Random*Source
Back to top
View user's profile Send private message Send e-mail Visit poster's website
Tim Servo



Joined: Jul 16, 2006
Posts: 924
Location: Silicon Valley
Audio files: 11

PostPosted: Wed Aug 22, 2007 1:03 pm    Post subject: TH-201 "Mankato" PCBs available
Subject description: Pick 4 outputs
Reply with quote  Mark this post and the followings unread

fonik wrote:
thanks for your quick reply, tim.

next question: if i'd decided to use only 4 outputs of the mankato, which one would you recommend from a personal point of view? maybe somebody already mentioned this but i probably missed it.


************
Well, my original ProtoMankato (Mankatus Tweakus Originalus) features the 12, -12, 24 and -24 outs. Great sound, and I get quadrature sines if I need them. The outputs are like this:
-12dB = 0°
-24dB = 90°
12dB = 180°
24dB = 270°

If you really want a more "electronic" sound you could also chose to use the 6dB and 18dB outputs instead:
6dB = 0°
18dB = 90°
-6dB = 180°
-18dB = 270°

Personally, I'd go with the first option. Of course, if you don't care about using the quadrature sine wave outs, then just pick the 6, 12, 18 and 24 outs. You can still use the Mankato as a VCLFO, but the phases would be:
6dB = 0°
12dB = 225°
18dB = 90°
24dB = 315°

With this setup, you could use external inverters with the 0 and 90 degree outs to get quadrature sines if you really needed them. Might be a pretty attractive option in a modular.

So the final answer is - it depends on how you're going to use the Mankato. Smile


Tim (working all the angles) Servo
Back to top
View user's profile Send private message
Display posts from previous:   
Post new topic   Reply to topic Moderators: Scott Stites
Page 3 of 7 [156 Posts]
View unread posts
View new posts in the last week
Goto page: Previous 1, 2, 3, 4, 5, 6, 7 Next
Mark the topic unread :: View previous topic :: View next topic
 Forum index » DIY Hardware and Software » Thomas Henry designs
Jump to:  

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum


Forum with support of Syndicator RSS
Powered by phpBB © 2001, 2005 phpBB Group
Copyright © 2003 through 2009 by electro-music.com - Conditions Of Use