spring reverb

[Alex]

Wondering if anyone can explain the method for connecting a coil to a
spring to achieve a reverb effect. I need to know what sort of coil to
use, and whether a piezo transducer could be useful in this. Any help
would be much appreciated, as am finding many written references to
such techniques, however, little by way of actual description of the
mechanics of the thing..... If anyone knows of a schematic existing on
the web then that would be a great help,

Thanks in advance....

 

[GPG]

vtvtvt@uk2.net (Alex) wrote in message news:<daeb8c85.0403251034.6f37e0d3@posting.google.com>...

Wondering if anyone can explain the method for connecting a coil to a
spring to achieve a reverb effect. I need to know what sort of coil to
use, and whether a piezo transducer could be useful in this. Any help
would be much appreciated, as am finding many written references to
such techniques, however, little by way of actual description of the
mechanics of the thing..... If anyone knows of a schematic existing on
the web then that would be a great help,

Thanks in advance....

Google "spring reverb"
Also http://www.electronicpeasant.com/projects/springs/springs.html

 

[Tony]

AFAIK, spring reverbs work by twisting the spring, a little like a tiny
synchronous or stepper motor. If you tried to vibrate the spring axially or
laterally, it would be dramatically more sensitive to ambient vibration. So you
need a tiny magnet aligned so it's twisted a different way for each polarity if
coil current - just like the "real" ones. I can't see any rational way to use a
speaker, much less a piezo.

If you're into experimenting and have the space, you'll probably do better
making a plate reverb (though a lot less portable).

On Thu, 25 Mar 2004 22:08:59 GMT, "Tweetldee" <masondg4499@comcast99.net> wrote:

"Alex" <vtvtvt@uk2.net> wrote in message
news:daeb8c85.0403251034.6f37e0d3@posting.google.com...
Wondering if anyone can explain the method for connecting a coil to a
spring to achieve a reverb effect. I need to know what sort of coil to
use, and whether a piezo transducer could be useful in this. Any help
would be much appreciated, as am finding many written references to
such techniques, however, little by way of actual description of the
mechanics of the thing..... If anyone knows of a schematic existing on
the web then that would be a great help,

Thanks in advance....

I don't think a piezo element would give you sufficient physical movement of
the spring to produce a noticable effect. Get a small speaker, such as a
small computer speaker. Affix the spring to the speaker's dome. I would
suggest that you replace the paper or plastic dome with a metal disc of the
same diameter. Drill a couple small holes that will allow you to hook the
spring to the disc. Glue the metal disc in the place of the original dome.
Drive the speaker with a small amp, such as the LM380. You might use a
similar setup on the other end of the spring. Connect the voice coil to an
opamp to detect the reverbed audio.
Depending on the spring's characteristics, you might need more or less power
to drive it. Limp springs sound better than stiff springs.

Cheers!!!!

Tony (remove the "_" to reply by email)

 

[CBarn24050]

Wondering if anyone can explain the method for connecting a coil to a

They don't, the magnetic field from the coil makes the spring vibrate, the
pickup works like a guitar pickup.

 

[Spajky]

On Thu, 25 Mar 2004 22:08:59 GMT, "Tweetldee"
<masondg4499@comcast99.net> wrote:

"Alex" <vtvtvt@uk2.net> wrote in message
news:daeb8c85.0403251034.6f37e0d3@posting.google.com...
Wondering if anyone can explain the method for connecting a coil to a
spring to achieve a reverb effect. I need to know what sort of coil to
use, and whether a piezo transducer could be useful in this.

I don't think a piezo element would give you sufficient physical movement of
the spring to produce a noticable effect.

20y ago I made a spring reverberation sistem using cristall gramophone
pick-ups & small driver/pickUp electronics (150mv/47k) for my never
finished mixing console; worked like a charm & both can be seen on the
right lower corner on the slide on my site under music!

-- Regards, SPAJKY ÂŽ
& visit my site @ http://www.spajky.vze.com
"Tualatin OC-ed / BX-Slot1 / inaudible setup!"
E-mail AntiSpam: remove ##

 

[R. Steve Walz]

Alex wrote:

Wondering if anyone can explain the method for connecting a coil to a
spring to achieve a reverb effect. I need to know what sort of coil to
use, and whether a piezo transducer could be useful in this. Any help
would be much appreciated, as am finding many written references to
such techniques, however, little by way of actual description of the
mechanics of the thing..... If anyone knows of a schematic existing on
the web then that would be a great help,

Thanks in advance....
--------------------

http://www.electronicpeasant.com/projects/springs/springs.html

http://www.armory.com/~rstevew/Public/SoundSynth/Reverb/reverb.gif
http://www.armory.com/~rstevew/Public/SoundSynth/Reverb/reverb.txt
http://www.armory.com/~rstevew/Public/SoundSynth/Reverb/reverbx.gif
http://www.armory.com/~rstevew/Public/SoundSynth/Reverb/screverb.gif

-Steve
--
-Steve Walz rstevew@armory.com ftp://ftp.armory.com/pub/user/rstevew
Electronics Site!! 1000's of Files and Dirs!! With Schematics Galore!!
http://www.armory.com/~rstevew or http://www.armory.com/~rstevew/Public

 

[GPG]

cbarn24050@aol.com (CBarn24050) wrote in message news:<20040326042235.27085.00000084@mb-m12.aol.com>...

Wondering if anyone can explain the method for connecting a coil to a

They don't, the magnetic field from the coil makes the spring vibrate, the
pickup works like a guitar pickup.

No. By far the most common is torsional coupling. See
http://www.electronicpeasant.com/projects/springs/springs.html

 

[Dave Cole]

in article 6NI8c.92255$1p.1392839@attbi_s54, Tweetldee at
masondg4499@comcast99.net wrote on 3/25/04 16:10:

"Alex" <vtvtvt@uk2.net> wrote in message
news:daeb8c85.0403251034.6f37e0d3@posting.google.com...
Wondering if anyone can explain the method for connecting a coil to a
spring to achieve a reverb effect. I need to know what sort of coil to
use, and whether a piezo transducer could be useful in this. Any help
would be much appreciated, as am finding many written references to
such techniques, however, little by way of actual description of the
mechanics of the thing..... If anyone knows of a schematic existing on
the web then that would be a great help,

Thanks in advance....




You might Google around Hammond Organ. IIRC they pioneered in the voice

coil/spring bank/voice coil type of reverb system. (another type was a large
[4'x8'] steel sheet with magnetic pickups placed in odd spots near the
elastically suspended sheet) The driver/receiver units looked like large PM
loudspeakers without frames or cones, and they connected to about 8 long,
loose, limp springs in paralell between them.
HTH
Dave Cole

 

[Bob Stephens]

On Tue, 30 Mar 2004 15:12:25 GMT, Michael wrote:

Dave Cole wrote:

in article 6NI8c.92255$1p.1392839@attbi_s54, Tweetldee at
masondg4499@comcast99.net wrote on 3/25/04 16:10:

"Alex" <vtvtvt@uk2.net> wrote in message
news:daeb8c85.0403251034.6f37e0d3@posting.google.com...
Wondering if anyone can explain the method for connecting a coil to a
spring to achieve a reverb effect. I need to know what sort of coil to
use, and whether a piezo transducer could be useful in this. Any help
would be much appreciated, as am finding many written references to
such techniques, however, little by way of actual description of the
mechanics of the thing..... If anyone knows of a schematic existing on
the web then that would be a great help,

Thanks in advance....




You might Google around Hammond Organ. IIRC they pioneered in the voice
coil/spring bank/voice coil type of reverb system. (another type was a large
[4'x8'] steel sheet with magnetic pickups placed in odd spots near the
elastically suspended sheet) The driver/receiver units looked like large PM
loudspeakers without frames or cones, and they connected to about 8 long,
loose, limp springs in paralell between them.
HTH
Dave Cole



Hah! Reminds me that I heard that kind of reverb in a car (Pontiac?)
back in the 60's. Buddy of mine snagged his Dad's wheels to cart a
bunch of us to bowling. Every time car hit a bump in the road .....
BWA-A-A-ANG. It was pretty awful. But thanks for the memory.

Did that actually exist? If so, too funny! Probably sounded great in the
lab... I once saw a '60 Corvette for sale with a 45 RPM turntable in the
glove compartment. What were THEY smoking?

Bob

 

[JeffM]

I need to know...whether a piezo transducer could be useful in this.
Alex

You might Google around Hammond Organ. IIRC they pioneered in the voice
coil/spring bank/voice coil type of reverb system. (another type was a large
[4'x8'] steel sheet with magnetic pickups placed in odd spots near the
elastically suspended sheet) The driver/receiver units looked like large PM
loudspeakers without frames or cones, and they connected to about 8 long,
loose, limp springs in paralell between them.

Dave Cole

Dave,
Did you ever see one of Hammond's oil-filled units? Very messy.
Definitely not meant for easy transport by a travelling band!

Alex,
Baldwin's last vacuum tube organs used a piezo technique.
The springs were heavy gauge (~18AWG steel),
about 1" dia. coils, ~3 ft. long. They were slung in a arc.
I believe they used acoustic coupling from the cabinet,
rather than using a driven element on the spring assembly.

 

[Dave Cole]

in article f8b945bc.0403300943.6e4a1f2d@posting.google.com, JeffM at
jeffm_@email.com wrote on 3/30/04 12:43:

I need to know...whether a piezo transducer could be useful in this.
Alex

You might Google around Hammond Organ. IIRC they pioneered in the voice
coil/spring bank/voice coil type of reverb system. (another type was a large
[4'x8'] steel sheet with magnetic pickups placed in odd spots near the
elastically suspended sheet) The driver/receiver units looked like large PM
loudspeakers without frames or cones, and they connected to about 8 long,
loose, limp springs in paralell between them.

Dave Cole

Dave,
Did you ever see one of Hammond's oil-filled units? Very messy.

Never did, but I'd like to see how they were built.
Dave

Alex,
Baldwin's last vacuum tube organs used a piezo technique.
The springs were heavy gauge (~18AWG steel),
about 1" dia. coils, ~3 ft. long. They were slung in a arc.
I believe they used acoustic coupling from the cabinet,
rather than using a driven element on the spring assembly.