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| Subject | Re: How do those Spring Reverbs work in guitar amps? |
|---|---|
| Newsgroups | sci.electronics.design |
| References | <iiircct4fsop4magi8jumhjsm9fnp6hrhi@4ax.com> <50a79d86-0efd-4aa4-a5ac-2d26f4bedff8@googlegroups.com> <7b45b060-d6a0-4181-8f53-697a2b167502@googlegroups.com> |
| From | Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> |
| Date | 2017-03-21 03:15 -0400 |
| Message-ID | <MqWdnaukwMtTT03FnZ2dnUU7-W2dnZ2d@supernews.com> (permalink) |
On 03/20/2017 03:24 PM, George Herold wrote: > On Saturday, March 18, 2017 at 9:08:19 PM UTC-4, Phil Allison wrote: >> olds...@tubes.com wrote: >>> >>> The Spring Reverbs inside guitar amps have always fascinated me, >>> and I took them one step further by connecting one to my stereo >>> years ago, and the sound was really cool! >>> >>> So, yea, I know the basic operation. According to one web >>> article, there is a transducer at one end of a spring and a >>> pickup on the other end. This caused the spring to vibrate and >>> create the reverb effect. One group from the 1960s and 70s that >>> really used them was the Ventures. (I have to mention that I love >>> that groups music). Often when they play, you can actually hear >>> them springs. >>> >>> I've taken them inside guitar amps and bnaged them, and they >>> really can make a clatter. >>> >>> But what I am not finding is exactly what or how does this >>> transducer work. Is it similar to a speaker coil? Or what goes on >>> inside there? >>> >>> And the pickup, is that similar to a microphone, or what? >>> >>> There seems to be nothing that actually details the workings >>> inside of them on the web. So, I thought I'd ask on here. >>> >> >> ** The long springs transmit torsional waves, twisting back and >> forward so must be driven the same way. Tiny tube magnets are made >> to twist by the drive coil assembly while at the far end a near >> identical transducer converts the twisting back to an electrical >> signal. >> >> The drive assembly is a kind of motor that makes the magnet rotate >> on its axis about +/- 30degrees. A torsional wave travels fairly >> slowly down a spring, making for long reverb times. >> >> A major benefit of this method is that external vibrations do not >> induce torsional waves in the springs but only lateral ones and so >> are largely rejected by the pick up assembly. >> >> AFAIK the idea was patented by Hammond in the late 50s - then made >> famous by Fender in the 60s guitar amps. >> >> BYI I agree, it is not easy to find the above info on the net >> since the Accutronics site disappeared. >> >> >> >> .... Phil > > Cool! This is mostly unrelated, but with the right choice of mass > and moment of inertia you can make a Wilberforce Pendulum, where the > torsional mode is almost the same frequency as the vibrational mode, > and you can get them to couple. > https://www.youtube.com/watch?v=S42lLTlnfZc We made these with > slinkys and 1 foot rulers (with pennies taped on the ends). > > George H. > Fun, thanks. Cheers Phil Hobbs -- Dr Philip C D Hobbs Principal Consultant ElectroOptical Innovations LLC Optics, Electro-optics, Photonics, Analog Electronics 160 North State Road #203 Briarcliff Manor NY 10510 hobbs at electrooptical dot net http://electrooptical.net
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How do those Spring Reverbs work in guitar amps? oldschool@tubes.com - 2017-03-18 19:12 -0500
Re: How do those Spring Reverbs work in guitar amps? rickman <gnuarm@gmail.com> - 2017-03-18 20:47 -0400
Re: How do those Spring Reverbs work in guitar amps? Phil Allison <pallison49@gmail.com> - 2017-03-18 18:11 -0700
Re: How do those Spring Reverbs work in guitar amps? Phil Allison <pallison49@gmail.com> - 2017-03-18 18:08 -0700
Re: How do those Spring Reverbs work in guitar amps? Don Kuenz <g@crcomp.net> - 2017-03-19 05:08 +0000
Re: How do those Spring Reverbs work in guitar amps? Phil Allison <pallison49@gmail.com> - 2017-03-18 22:38 -0700
Re: How do those Spring Reverbs work in guitar amps? jurb6006@gmail.com - 2017-03-19 02:46 -0700
Re: How do those Spring Reverbs work in guitar amps? Phil Allison <pallison49@gmail.com> - 2017-03-19 04:25 -0700
Re: How do those Spring Reverbs work in guitar amps? jurb6006@gmail.com - 2017-03-19 06:01 -0700
Re: How do those Spring Reverbs work in guitar amps? jurb6006@gmail.com - 2017-03-19 07:46 -0700
Re: How do those Spring Reverbs work in guitar amps? "Dave M" <dgminala@mediacombb.net> - 2017-03-19 22:49 -0500
Re: How do those Spring Reverbs work in guitar amps? Phil Allison <pallison49@gmail.com> - 2017-03-19 22:31 -0700
Re: How do those Spring Reverbs work in guitar amps? "Michael A. Terrell" <mike.terrell@earthlink.net> - 2017-03-23 19:01 -0400
Re: How do those Spring Reverbs work in guitar amps? Phil Allison <pallison49@gmail.com> - 2017-03-23 16:24 -0700
Re: How do those Spring Reverbs work in guitar amps? "dcaster@krl.org" <dcaster@krl.org> - 2017-03-23 16:37 -0700
Re: How do those Spring Reverbs work in guitar amps? Phil Allison <pallison49@gmail.com> - 2017-03-23 17:46 -0700
Re: How do those Spring Reverbs work in guitar amps? "dcaster@krl.org" <dcaster@krl.org> - 2017-03-23 18:05 -0700
Re: How do those Spring Reverbs work in guitar amps? "Michael A. Terrell" <mike.terrell@earthlink.net> - 2017-03-25 03:18 -0400
Re: How do those Spring Reverbs work in guitar amps? "Michael A. Terrell" <mike.terrell@earthlink.net> - 2017-03-25 03:16 -0400
Re: How do those Spring Reverbs work in guitar amps? Jasen Betts <jasen@xnet.co.nz> - 2017-03-26 19:36 +0000
Re: How do those Spring Reverbs work in guitar amps? oldschool@tubes.com - 2017-03-20 14:04 -0500
Re: How do those Spring Reverbs work in guitar amps? Don Kuenz <g@crcomp.net> - 2017-03-21 17:22 +0000
Re: How do those Spring Reverbs work in guitar amps? Don Kuenz <g@crcomp.net> - 2017-03-20 19:27 +0000
Re: How do those Spring Reverbs work in guitar amps? George Herold <gherold@teachspin.com> - 2017-03-20 12:24 -0700
Re: How do those Spring Reverbs work in guitar amps? Clifford Heath <no.spam@please.net> - 2017-03-21 09:14 +1100
Re: How do those Spring Reverbs work in guitar amps? George Herold <gherold@teachspin.com> - 2017-03-20 17:04 -0700
Re: How do those Spring Reverbs work in guitar amps? "dcaster@krl.org" <dcaster@krl.org> - 2017-03-20 20:06 -0700
Re: How do those Spring Reverbs work in guitar amps? jurb6006@gmail.com - 2017-03-21 00:18 -0700
Re: How do those Spring Reverbs work in guitar amps? George Herold <gherold@teachspin.com> - 2017-03-21 05:55 -0700
Re: How do those Spring Reverbs work in guitar amps? "dcaster@krl.org" <dcaster@krl.org> - 2017-03-21 06:46 -0700
Re: How do those Spring Reverbs work in guitar amps? Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> - 2017-03-21 03:15 -0400
Re: How do those Spring Reverbs work in guitar amps? bitrex <bitrex@de.lete.earthlink.net> - 2017-03-19 22:25 -0400
Re: How do those Spring Reverbs work in guitar amps? Phil Allison <pallison49@gmail.com> - 2017-03-19 19:52 -0700
Re: How do those Spring Reverbs work in guitar amps? bitrex <bitrex@de.lete.earthlink.net> - 2017-03-19 23:14 -0400
Re: How do those Spring Reverbs work in guitar amps? bitrex <bitrex@de.lete.earthlink.net> - 2017-03-19 23:14 -0400
Re: How do those Spring Reverbs work in guitar amps? Phil Allison <pallison49@gmail.com> - 2017-03-19 20:32 -0700
Re: How do those Spring Reverbs work in guitar amps? bitrex <bitrex@de.lete.earthlink.net> - 2017-03-20 00:01 -0400
Re: How do those Spring Reverbs work in guitar amps? Phil Allison <pallison49@gmail.com> - 2017-03-19 22:32 -0700
Re: How do those Spring Reverbs work in guitar amps? jurb6006@gmail.com - 2017-03-20 03:52 -0700
Re: How do those Spring Reverbs work in guitar amps? bitrex <bitrex@de.lete.earthlink.net> - 2017-03-20 15:18 -0400
Re: How do those Spring Reverbs work in guitar amps? Tauno Voipio <tauno.voipio@notused.fi.invalid> - 2017-03-20 21:28 +0200
Re: How do those Spring Reverbs work in guitar amps? bitrex <bitrex@de.lete.earthlink.net> - 2017-03-20 16:26 -0400
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