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Re: MicMix MasterRoom Spring Reverb Project

Posted: Thu Dec 18, 2008 11:58 am
by jlm
After the first two or so the tension isn't as tight. The tension however doesn't effect the delay of the line, the number of turns does since it's torsional. In that sense it's not like a musical instrument string.
Thanks for all your answers; I was more concerned about any physical damage that could be done to the transducer because of the increased tension, not the sonic aspects.

Re: MicMix MasterRoom Spring Reverb Project

Posted: Thu Dec 18, 2008 12:09 pm
by mediatechnology
We used the 13.5 ms line in the XL-305 on that same sled. The transducer that the spring hooks on to is a piece of wire soldered into a brass tube. It has quite a bit of pull strength.

Re: MicMix MasterRoom Spring Reverb Project

Posted: Thu Dec 18, 2008 3:57 pm
by emrr
I am recalling a lightbulb shunt limiter on the dedicated reverb amp/speaker combo in my Hammond M102 organ. I assume that's to address the boioioioioinnnggg.

Re: MicMix MasterRoom Spring Reverb Project

Posted: Thu Dec 18, 2008 5:19 pm
by mediatechnology
I think it could be for boing. IIRC Orban used a limiter in their unit.

The shunt limiter is in the drive side or receive?

Re: MicMix MasterRoom Spring Reverb Project

Posted: Fri Dec 19, 2008 10:08 am
by jlm
emrr wrote:I am recalling a lightbulb shunt limiter on the dedicated reverb amp/speaker combo in my Hammond M102 organ. I assume that's to address the boioioioioinnnggg.
It's definitely for the protection of the reverb drive transducer, according to the note on the schematic: These lamps are used as volume limiters, not for illumination! :)

Re: MicMix MasterRoom Spring Reverb Project

Posted: Fri Dec 19, 2008 10:12 am
by emrr
beat me to it; thanks

Re: MicMix MasterRoom Spring Reverb Project

Posted: Fri Dec 19, 2008 10:13 am
by mediatechnology
So the lamp is a transducer burnout protector rather than de-boing device.

EDIT: Listening to some of the heavily distorted Perez Perado tracks from the 50's and 60's I can see why they added the lamp.

Re: MicMix MasterRoom Spring Reverb Project

Posted: Sat Dec 20, 2008 10:34 am
by emrr
it does seem to be very smooth, so some de-boing happens.

Re: MicMix MasterRoom Spring Reverb Project

Posted: Mon Dec 22, 2008 5:03 am
by jlm
The Orban reverb was one of the nicest sounding units using "Hammond" springs. It used a "floating threshold detector" that seemed to do a good job.
There's also one unit I'm very curious about: Fairchild had a chunky beast with springs; I remember, there was one at Studios Barclay when I worked there in the 70's -it was decommissioned at the time. I have found only minimal litt about it, no schemos. Maybe it didn't sound that good...

Re: MicMix MasterRoom Spring Reverb Project

Posted: Mon Dec 22, 2008 8:11 am
by emrr
I've not heard one to comment. 3 tanks I think. Uses the Fairchild SS 600 series mic preamp modules for pickup; maybe for drive too. Have to look at some pics I've saved to remember.