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Re: How do those Spring Reverbs work in guitar amps?

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On 03/19/2017 11:14 PM, bitrex wrote:
> On 03/19/2017 10:52 PM, Phil Allison wrote:
>
>> The input coil used has a nominal impedance of 8 ohms at 1kHz, much
>> lower at 100Hz and much higher at 10kHz.
>>
>> Drive power requirement is around 10mW, some as other designs, but the
>> low impedance means it cannot be driven fully by a single, regular
>> op-amp.
>
> That makes sense. How much average voltage would one expect to see
> between terminals 4 and 5 of the tank input prior to the unit distorting
> with a guitar signal?
>
> The Bandit in this unit from a Q on sci.electronics.repair seems to be
> using a single 4558 section to drive the tank. Also with current feedback
>
> <http://music-electronics-forum.com/attachments/34861d1437104328-screen-shot-2015-07-16-8.49.19-pm.png>
>
>
> The collector of Q3 is connected to ground, while Q4 is going to what I
> guess is the negative supply. Interesting.

In the Roland circuit that is

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Thread

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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