YAEWSBM - Yet Another Etherwave Standard Bass Mod

Posted: 5/4/2018 3:41:19 AM
oldtemecula

From: 60 Miles North of San Diego, CA

Joined: 10/1/2014

dew,

The simplicity of your modification is what led me to the classic Clara sound I was after, for about $30. This mixer method can be applied to solid state or vacuum tube. At about the halfway point in the sample below I Switch on Clara for an OMG moment, it was magical. 

What makes the theremin special is how something very beautiful can come from a simple electronic circuit using human influence, not a cheap toy sine wave whistle. Below is a slight modification of an EtherWave Standard similar to the Bass mod. I gave away the small PCB to do this at no cost and almost no one was interested. Some want to only go low when my circuit goes beautifully high and rumbles low. My expectation for a theremin musical sound must be different than most, I guess.
 
http://www.oldtemecula.com/theremin/ews-buffer-exciter/sounds/ews-clara-off-on.wav

Christopher

You mention sub 1 Hz as useful, we have earthquakes in so cal in that range, had one 5/8/18 not enjoyable. 4.5 mag

Posted: 3/2/2019 11:24:14 PM
tinkeringdude

From: Germany

Joined: 8/30/2014

Having more range on the EW Standard, I wonder, would it make sense to add a range switch like the EW pro has, to not cram so many octaves in an arm's length of control?
What would need to be changed in the pitch oscillator(s) to get only an about 2 octaves change (which I guess is what the 6 octave EW pro does, as it has 3 ranges from what I found?), and what would you switch to get different ranges? I guess one could tap the capacitor of the LC circuit, I wonder whether running wires from that to a switch on the metal front panel would have uninvited consequences.

Posted: 3/3/2019 11:37:40 AM
dewster

From: Northern NJ, USA

Joined: 2/17/2012

"Having more range on the EW Standard, I wonder, would it make sense to add a range switch like the EW pro has, to not cram so many octaves in an arm's length of control?" - tinkeringdude

Due to what I've dubbed "the invariant" a conventional heterodyning Theremin is pretty much stuck with a constant sensitivity if it is nulled to have a maximally linear mid-field.  There's nothing much that you can do to change this in the analog domain.

"What would need to be changed in the pitch oscillator(s) to get only an about 2 octaves change (which I guess is what the 6 octave EW pro does, as it has 3 ranges from what I found?), and what would you switch to get different ranges?"

I believe identical digital dividers on both the variable and fixed oscillators, pre-mixer, will give you octave selection.

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