Roger Mayer RM57 build?

[dirty1_1garry]

This is my 'more serious' prototype.  Stereo limiter on 7 x 10 cm.
Signal to noise ratio is 81 dB ("A" weighted) re. 1 Volt.
Stereo tracking is within 0.5 dB (I found 2 'matched pairs' out of 20 FETs)
Distortion is 0.3% @ 10 dB limiting (400 Hz, fast attack, fast release).
Metering circuit is 'under construction'.
It will directly take the voltage from the gate of the FET, so no extra FET for the meter circuit.

Wow wow, not so fast!))
smart and beauty build, congrats!

 

[desol]

You guys are starting to make this sound interesting!

 

[Spencerleehorton]

Build one, or two they are really fun sounding, my version which I’m assuming is the RM57 is a bit noisy but still very useable.
I’m happy to post the pcb print for everyone to make their own, just print out with a laser printer on cheap photo paper then iron on copper clad board, then dip in some ferric chloride for about an hour, wash off then drill holes and populate!!

 

[dirty1_1garry]

Build one, or two they are really fun sounding, my version which I’m assuming is the RM57 is a bit noisy but still very useable.
I’m happy to post the pcb print for everyone to make their own, just print out with a laser printer on cheap photo paper then iron on copper clad board, then dip in some ferric chloride for about an hour, wash off then drill holes and populate!!

Making of a sound/video samples of your final build would be great!

 

[Spencerleehorton]

Don’t worry I’ve got some time off over Xmas, some videos will be done!!

 

[desol]

I'm interested to hear it.

 

[Spencerleehorton]

Rather than recording it through my iPhone I’ll use camtasia and my webcam, just need to sort my internet as an Ethernet cable has stopped working!!
That way you can see protools and the compressor in action and I’ll babble along!!!

 

[Spencerleehorton]

Sorted my Ethernet problems, last 12 hour shift then 9 days off!! so I’ll start doing some stuff tomorrow morning.

 

[Spencerleehorton]

Finally got round to doing a video:

https://youtu.be/ophORxkruoo

will do a few more once i get the RM68 noise gates done.

 

[dasnevestheo]

That sounds really nice ! love it

 

[Spencerleehorton]

Yes I think it really works parallel , need to try it out more in a session though

 

[dasnevestheo]

Did you thinked about trying to implement a mix knob ?

 

[Spencerleehorton]

I’m happy with it to be honest, only thing that would improve it would be sidechain eq.

 

[dirty1_1garry]

Finally got round to doing a video:

https://youtu.be/ophORxkruoo

will do a few more once i get the RM68 noise gates done.

Sounds cool!

 

[Spencerleehorton]

If anyone wants me to post my dodgy pcb print I’m happy too.

 

[dasnevestheo]

Of course, please do

 

[desol]

Not bad...

 

[abbey road d enfer]

Hey, don't you think it appropriate to rename this whole thread to Roger Mayer RM58 compressor build?
RM57 (noise-gate) is discussed elsewhere.

 

[Spencerleehorton]

I'm pretty sure the noise gate is RM68, this compressor had two version RM57 and RM58, i think the difference was front panel design, dual concentric pot to separate pots.
Ive already started a RM68 post and i'm printing out pcbs at the moment.

Pcb print attached, happy new year yall!!!

 

[abbey road d enfer]

I'm pretty sure the noise gate is RM68, this compressor had two version RM57 and RM58

You're correct, my bad  :-[