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v-un-v
Janitor
Joined: May 16, 2005 Posts: 8933 Location: Birmingham, England, UK
Audio files: 11
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Posted: Sat Dec 16, 2006 5:29 am Post subject:
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I thought the core was a ferrite ring?
Wax-coated paper?? _________________ ACHTUNG!
ALLES TURISTEN UND NONTEKNISCHEN LOOKENPEEPERS!
DAS KOMPUTERMASCHINE IST NICHT FÜR DER GEFINGERPOKEN UND MITTENGRABEN! ODERWISE IST EASY TO SCHNAPPEN DER SPRINGENWERK, BLOWENFUSEN UND POPPENCORKEN MIT SPITZENSPARKSEN.
IST NICHT FÜR GEWERKEN BEI DUMMKOPFEN. DER RUBBERNECKEN SIGHTSEEREN KEEPEN DAS COTTONPICKEN HÄNDER IN DAS POCKETS MUSS.
ZO RELAXEN UND WATSCHEN DER BLINKENLICHTEN. |
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Uncle Krunkus
Moderator
Joined: Jul 11, 2005 Posts: 4761 Location: Sydney, Australia
Audio files: 52
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Posted: Sat Dec 16, 2006 5:36 am Post subject:
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Yeah, they wrap them up in wax paper at the end.
Makes them look like baby cheeses.
Kind of fitting for this time of year hey? _________________ What makes a space ours, is what we put there, and what we do there. |
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blue hell
Site Admin
Joined: Apr 03, 2004 Posts: 24075 Location: The Netherlands, Enschede
Audio files: 277
G2 patch files: 320
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Posted: Sat Dec 16, 2006 6:04 am Post subject:
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Uncle Krunkus wrote: | How the hell do you wind a toroidal core coil anyway? :? I'm assuming there is no gap in the core, but it seems getting hundreds of winds of enameled wire on there must be a bit of a magic trick. :shock: |
http://www.gormanmachine.com/videos/900m/900m.htm has a movie on top of the page, that'll make it clear. _________________ Jan
also .. could someone please turn down the thermostat a bit.
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Uncle Krunkus
Moderator
Joined: Jul 11, 2005 Posts: 4761 Location: Sydney, Australia
Audio files: 52
G2 patch files: 1
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Posted: Sat Dec 16, 2006 6:17 am Post subject:
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Thanks Jan,
I still don't completely understand how it does what it's doing though. _________________ What makes a space ours, is what we put there, and what we do there. |
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blue hell
Site Admin
Joined: Apr 03, 2004 Posts: 24075 Location: The Netherlands, Enschede
Audio files: 277
G2 patch files: 320
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Posted: Sat Dec 16, 2006 7:10 am Post subject:
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Maybe this will help - I can't see the pictures though as it requires quicktime and I've decided to deinstall that some days ago.
It doesn't seem to use the exact same principle - using some C shaped temporary wire storage thingy instead of a spool. _________________ Jan
also .. could someone please turn down the thermostat a bit.
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CZ Rider
Joined: Dec 14, 2006 Posts: 17 Location: Southeastern,PA
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Posted: Sat Dec 16, 2006 8:34 am Post subject:
914 Fixed Filter Bank |
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Hey, great info on these. Those new winders make mine look like
something from the 50's. On the old Moog winders, the ring is
a two part precision machined stainless piece. Looks solid when
put together. This is assembled through the donut (ferrite core).
I think, (I haven't tried this yet) you would then load this stainless
ring with the wire. On the outside of the ring is a tab that the wire
slides off then down to a small stationary hub in the center that
the wire guides around. As the ring spins the wire follows around
via the tab on the ring and center hub to make the loops on the
donut. On my old ones the donut is clamped in a vice that rotates
180 deg., then you have to stop and re-clamp for the other half.
Simple, right? Then you would strip and solder on heavier leads,
secure them and dip the assembly in hot wax. Done! Did I
mention there are about 5 different tensioners along the wire path
and all kinds of speeds for the winder and segment control. The
counters on these are vaccume tubes with segments in a circle to
indicate the number of turns. But I couldn't pass these up. The
seller said they would be trashed if someone did not pick them up.
A piece of Moog/Thomas history.
So If I actually get good at winding these, I still need to measure
the permeability of the cores to figure the amount of winds to get
the correct value for the 914. So, did anyone find a source for the
permeability meter or or a permeameter? |
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bachus
Joined: Feb 29, 2004 Posts: 2922 Location: Up in that tree over there.
Audio files: 5
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Posted: Sat Dec 16, 2006 8:59 am Post subject:
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Yea, thanks Jan, I've always wondered how that was done _________________ The question is not whether they can talk or reason, but whether they can suffer. -- Jeremy Bentham |
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jamos
Joined: Jun 01, 2004 Posts: 514 Location: Eugene, Oregon, USA
Audio files: 4
G2 patch files: 41
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Posted: Sat Dec 16, 2006 10:12 am Post subject:
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All of this makes me wonder...
is it no longer possible to buy inductors (the proper name for coils) off the shelf? |
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bachus
Joined: Feb 29, 2004 Posts: 2922 Location: Up in that tree over there.
Audio files: 5
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3phase
Joined: Jul 27, 2004 Posts: 1183 Location: Berlin
Audio files: 13
G2 patch files: 141
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Posted: Sat Dec 16, 2006 2:46 pm Post subject:
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this work for machines... |
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3phase
Joined: Jul 27, 2004 Posts: 1183 Location: Berlin
Audio files: 13
G2 patch files: 141
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Posted: Sat Dec 16, 2006 2:56 pm Post subject:
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jamos wrote: | All of this makes me wonder...
is it no longer possible to buy inductors (the proper name for coils) off the shelf? |
Vishay has them..but not from the shelf..you have to buy packs of 100 at least...
I will call the german company Haufe next week.. They are the best for audio inductors anyway... but... probably notr a company that holds stocks..
However..can be interesting to talk to an old man doing in audio inductors anyway.
I hears from a friend that ferid torodial inductors get into a kind of compression state in certain conditions..that can be wanted..or an item to be avoided.
I actually think it would be nice to have the coils etup in a way that the amplifier at the input can drive them into saturation.
I will see if i can get some more infos regarding that aspect. |
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