[sdiy] spring reverb.......

[phillip m gallo]

Daryl,

The old national databook depicted a bridge drive of reverb springs using
(if memory serves) an LM1877 (couple of watt speaker amp).  The spring is a
reactive load not typical of op-amp load characteristics especially TLO's.
The pre-amp end was there microphone amp at (again if memory serve about 40
dB.

regards,
p


-----Original Message-----
From: owner-synth-diy at dropmix.xs4all.nl
[mailto:owner-synth-diy at dropmix.xs4all.nl]On Behalf Of daryl groetsch
Sent: Wednesday, November 13, 2002 1:52 PM
To: synth-diy at dropmix.xs4all.nl
Subject: Re: [sdiy] spring reverb.......


Thanks everyone for the great tips. I tried some
different op-amps and temporarily used pots for the
feedback resistors. If I can get it loud enough, then
it's distorted. And when it's not distorted, it's very
quiet! (when adjusting the feedback on the input
and/or recovery circuit). Spring reverb is more tricky
than i expected! I think i'll study this one some
more:
http://www.accutronicsreverb.com/drive1.pdf

Thanks again,
Daryl

=====
http://www.darylgroetsch.com

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