Another diode bridge compressor

[Script]

I think we discussed driving the diode ladders differentially above (example: "Siemens U273 [..] albeit with a different bridge arrangement" in #56 (and before).

So, for example, an expensive DRV134 preceded by scale-down buffer, or just an extra cheap transistor for inverting CV, I assume.

And sorry, I had actually posted in the wrong thread. Was referring to "Dual Compressor (diode varimu)" thread, with schematics showing a U3A -- for what I called 'balancing', probably erraneously -- to

"keep the DC voltage at U1 outputs at the same potential as the junction (of the diodes)".

I think that is a different approach (?), maybe even better, as it does not drive the diode ladders differentially, but 'evens out" CV potential directly at the diode/line junction, where it matters more ?

Thread is this:
https://groupdiy.com/threads/dual-compressor-diode-bridge-vari-mu.80978/#post-1042166
Schematics this:
http://ghr.fi/proaudio/dualcomp/dualcomp.pdf

 

[Heikki]

Can the standalone diode bridge be retrofitted with this DC balancing ? Would different resistor values be needed ?

This question was meant for dual compressor but it also fits the new version of the diode comp.
https://ghr.fi/proaudio/diodecomp/64/32.pdf
If different amount of diodes were used, then it might be necessary to change R29/R31 and resistance of the pad before the diodes..

 

[Script]

Installed the Monacor LTR-110 today and do not hear a difference either -- but also don't need +20 dBu output level when they start to spit THD.

So now it's one INA followed by a transformer on the output (while the diodecomp32 has two INA stages ).

 

[AnthonyBisset]

Sounds cool!
Some kind of imaging thing happening. Can't quite put my finger on it...almost L/R swap ish in places?.Wearing headphones though..

Hi Scott,
Do you still have boards for the Dual Comp, Vari-Mu or Diode Bridge? I'd probably rather build the combined Dual Comp but I'm so excited about these designs that I'd tackle them individually if necessary.
I don't have access to PM yet but can respond if messaged .

 

[scott2000]

Do you still have boards for the Dual Comp, Vari-Mu or Diode Bridge?

Yes.
will pm...

 

[OneRoomStudio]

Yes.
will pm...

Are there boards available for this diode bridge comp, or just for the dual comp and vari-mu?

 

[AnthonyBisset]

Yes.
will pm...

Hiya Scott, I think I was accidentally blocked when you were doing some house cleaning re: DM's on your account? I'm still out here, ready to buy and build those PCBs. Please send a DM when you have time, thanks & cheers, A