Re: Roger Mayer RM57 build?
« Reply #280 on: December 13, 2018, 04:39:42 PM »
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!


Re: Roger Mayer RM57 build?
« Reply #281 on: December 15, 2018, 09:40:11 AM »
You guys are starting to make this sound interesting!

Spencerleehorton

Re: Roger Mayer RM57 build?
« Reply #282 on: December 15, 2018, 10:32:37 AM »
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!!
website: www.mohawkstudios.co.uk
email: [email protected]

If it hisses its probably the wrong impedance!!!
Or a snake!!!

Re: Roger Mayer RM57 build?
« Reply #283 on: December 15, 2018, 01:35:03 PM »
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

Re: Roger Mayer RM57 build?
« Reply #284 on: December 16, 2018, 05:17:29 PM »
Don’t worry I’ve got some time off over Xmas, some videos will be done!!
website: www.mohawkstudios.co.uk
email: [email protected]

If it hisses its probably the wrong impedance!!!
Or a snake!!!

Re: Roger Mayer RM57 build?
« Reply #285 on: December 17, 2018, 05:37:07 PM »
I'm interested to hear it.

Spencerleehorton

Re: Roger Mayer RM57 build?
« Reply #286 on: December 17, 2018, 10:45:52 PM »
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!!!
website: www.mohawkstudios.co.uk
email: [email protected]

If it hisses its probably the wrong impedance!!!
Or a snake!!!

Spencerleehorton

Re: Roger Mayer RM57 build?
« Reply #287 on: December 18, 2018, 11:01:23 AM »
Sorted my Ethernet problems, last 12 hour shift then 9 days off!! so I’ll start doing some stuff tomorrow morning.
website: www.mohawkstudios.co.uk
email: [email protected]

If it hisses its probably the wrong impedance!!!
Or a snake!!!

Spencerleehorton

Re: Roger Mayer RM57 build?
« Reply #288 on: December 29, 2018, 10:32:22 AM »
Finally got round to doing a video:

https://youtu.be/ophORxkruoo

will do a few more once i get the RM68 noise gates done.
website: www.mohawkstudios.co.uk
email: [email protected]

If it hisses its probably the wrong impedance!!!
Or a snake!!!

Re: Roger Mayer RM57 build?
« Reply #289 on: December 29, 2018, 02:32:00 PM »
That sounds really nice ! love it


Spencerleehorton

Re: Roger Mayer RM57 build?
« Reply #290 on: December 29, 2018, 05:51:19 PM »
Yes I think it really works parallel , need to try it out more in a session though
website: www.mohawkstudios.co.uk
email: [email protected]

If it hisses its probably the wrong impedance!!!
Or a snake!!!

Re: Roger Mayer RM57 build?
« Reply #291 on: December 29, 2018, 06:44:41 PM »
Did you thinked about trying to implement a mix knob ?

Spencerleehorton

Re: Roger Mayer RM57 build?
« Reply #292 on: December 29, 2018, 11:38:16 PM »
I’m happy with it to be honest, only thing that would improve it would be sidechain eq.
website: www.mohawkstudios.co.uk
email: [email protected]

If it hisses its probably the wrong impedance!!!
Or a snake!!!

Re: Roger Mayer RM57 build?
« Reply #293 on: December 30, 2018, 02:34:39 AM »
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

Re: Roger Mayer RM57 build?
« Reply #294 on: December 30, 2018, 03:31:41 AM »
If anyone wants me to post my dodgy pcb print I’m happy too.
website: www.mohawkstudios.co.uk
email: [email protected]

If it hisses its probably the wrong impedance!!!
Or a snake!!!

Re: Roger Mayer RM57 build?
« Reply #295 on: December 30, 2018, 04:20:06 AM »
Of course, please do :)

Re: Roger Mayer RM57 build?
« Reply #296 on: December 31, 2018, 07:15:46 PM »
Not bad...

abbey road d enfer

Re: Roger Mayer RM57 build?
« Reply #297 on: January 01, 2019, 07:00:30 AM »
Hey, don't you think it appropriate to rename this whole thread to Roger Mayer RM58 compressor build?
RM57 (noise-gate) is discussed elsewhere.
Who's right or wrong is irrelevant. What matters is what's right or wrong.
Star ground is for electricians.

Spencerleehorton

Re: Roger Mayer RM57 build?
« Reply #298 on: January 01, 2019, 08:27:06 AM »
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!!!
website: www.mohawkstudios.co.uk
email: [email protected]

If it hisses its probably the wrong impedance!!!
Or a snake!!!

abbey road d enfer

Re: Roger Mayer RM57 build?
« Reply #299 on: January 01, 2019, 11:58:13 AM »
I'm pretty sure the noise gate is RM68, this compressor had two version RM57 and RM58
You're correct, my bad  :-[
Who's right or wrong is irrelevant. What matters is what's right or wrong.
Star ground is for electricians.


 

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