Simple transformerless compressor

[RuudNL]

Just by accident, I found this video on youtube.
In fact it is a very simple diode bridge compressor.
It looks interesting enough to experiment with this circuit.

Later there was an 'improved version'

IMHO opinion interesting enough to experiment with on a rainy day...

 

[richiyobs]

Have you simulated It... Or are you waiting for a rainy Day to build and so test It in real time ?
I like the simple solution for compression metering
Best

 

[zamproject]

This one is available as an eurorack synth module

https://www.ericasynths.lv/shop/diy-kits-1/edu-diy-compressor/
At this prince I see no reason to lost the time to source the BOM, and protoboard it to see if it work...
You better take the time and more money after that (if you like the result) to make it more compatible with our studio use (19' or 500 conversion)

 

[wlinart]

It’s also nice that the manual included explains a lot of the theory, 71 pages

 

[richiyobs]

Here Is my Diode Comp 500 proto... I m going to set 2boards in a stereo unit...
Cause of the space only one set of controls with separate detectors and sd39 single vu Meter... Also still testing a vca made of 16 diodes.
As i get time i Will build this Erica synth version
Just to compare different designs...
Best

 

[abbey road d enfer]

Just by accident, I found this video on youtube.
In fact it is a very simple diode bridge compressor.
It looks interesting enough to experiment with this circuit.

Later there was an 'improved version'

IMHO opinion interesting enough to experiment with on a rainy day...

There seems to be everything to constitute a decent diode compressor.
As always the devil is in the details. I would use a full-wave rectifier in the side-chain though.

 

[Piedwagtail]

It does apparently, Abbey.
Right in that schematic.
p35-6 details how it works in the manual.

R

 

[richiyobs]

just an attempt with few mods ... was very curious so had to simulate it..
is this doable?
the wave out and detector also looks fine
is it a good practice adding coupling capacitors between stages respect to the original design?
i m not so expert to judge on my own
thanks for your attention
best

 

[abbey road d enfer]

It does apparently, Abbey.
Right in that schematic.
p35-6 details how it works in the manual.

R

Yes. It was not apparent at first sight. I wonder why he did it that way because it's something that does not always work, and it's not much simpler than a more conventional type.