lolo-m
Well-known member
TO SAVE SOME TIME IN TROUBLESHOOTING, PLEASE READ ALL POSTS BEFORE IMPLEMENTING THE SCAB IN YOUR PM660/670. THANKS
Hi,
Here is a build help thread for poeple who choosed to implement my SCAmp Booster on their PM660 or PM670. Just to save some time, let's call it SCAB (SCAmp Booster ;D)
Schematics :
http://nbns-studio.pagesperso-orange.fr/PM670/boost-analags-sc-amp.gif
Just a few soundsamples realised with the same settings using the two different modes . I'm sure the FAIRCHILD setting used in SCAB mode isn't what I would use to master this song but it is revelant of the different compression ways you can have using the SCAB:
Soundsamples :
Uncompressed file :
http://pagesperso-orange.fr/NBNS-Studio/PM670/UNPROCESSED.wav
Analag's way :
http://pagesperso-orange.fr/NBNS-Studio/PM670/pm670-analag-network.wav
SCAB Mode using Fairchild Position 2 setting :
http://pagesperso-orange.fr/NBNS-Studio/PM670/pm670-scab-fairchild-pos2.wav
SCAB Mode using custom Fairchild type TC network :
http://pagesperso-orange.fr/NBNS-Studio/PM670/pm670-scab-fairchild-custom.wav
Drum sounsamples :
Uncompressed :
http://pagesperso-orange.fr/NBNS-Studio/PM670/DRUMSNOCOMP.wav
Analags network :
http://pagesperso-orange.fr/NBNS-Studio/PM670/DRUMSANALAG.wav
Fairchild position 2 :
http://pagesperso-orange.fr/NBNS-Studio/PM670/DRUMSFAIR2.wav
Custom TC network 1 :
http://pagesperso-orange.fr/NBNS-Studio/PM670/DRUMSCUSTOM1.wav
Custom TC network2 :
http://pagesperso-orange.fr/NBNS-Studio/PM670/DRUMSCUSTOM2.wav
Thanks to SaMpLeGoD for the BOM with Banzai codes :
http://pagesperso-orange.fr/NBNS-Studio/PM670/BOM_for_Side_Chain_Amp_Boost_for_PM670.doc
Thanks to Moby for the wiring guide ! It can be found here :
http://pagesperso-orange.fr/NBNS-Studio/PM670/PoorMan+SCAB-WiringGuide-R1.pdf
Or you can read that ::
Fill the board ;D !!!
On the PSU board set RV1 and RV2 to have +17V and -17V.
Connect those +-17 to my board.
If you start filling the PM board, don't solder D1, D2, D3, D4, C4, R16 and R18. Put 2 wire links between C4 pads and R18 pads.
If they're already soldered, solder a wire link between the C4 pins and between R18 pins. I can't honestly say that's it is a good idea to dissolder C4 (even if I did) as it can endomage the PCB if not correctly done. Cut D1, D2, D3, D4 on the middle of the glass tube. Then keeping hot the pin solder, remove the half diodes. This is my tip to remove these diodes easily, without staying hot a too long time on the board.
TR4 output (secondary) goes directly on the SCAB board.
The SCAB "to attack" connector will be connected to the "attack" connector of the PM board.
The SCAB "attack" connector is the 10K pot of Analags network design.
The SCAB "MODEA-L or R" + MODEB-L or R" is where you connect the DPDT switch to change the MODE from "Analag's network" to "Your a la Fairchild network". There's unfortunately a 1 dB overall gain raise when not in "Analag's mode". There are 3 pads added to solve this but we will talk about this later.
Put the SCAB in "analag's mode", set RVx01 so the SCAB "to attack" connector pin to pin reads 0V DC on multimeter.
If you solder a 2uF in Cx03 place, you've got the Fairchild POS 2 setting when switched in "a la Fairchild mode".
Here you are, ready to experiment !
Play, have fun and feel free to post here...
EDIT : Read my "pimping my own pimp" post on second page to have a really well working mod !
Hi,
Here is a build help thread for poeple who choosed to implement my SCAmp Booster on their PM660 or PM670. Just to save some time, let's call it SCAB (SCAmp Booster ;D)
Schematics :
http://nbns-studio.pagesperso-orange.fr/PM670/boost-analags-sc-amp.gif
Just a few soundsamples realised with the same settings using the two different modes . I'm sure the FAIRCHILD setting used in SCAB mode isn't what I would use to master this song but it is revelant of the different compression ways you can have using the SCAB:
Soundsamples :
Uncompressed file :
http://pagesperso-orange.fr/NBNS-Studio/PM670/UNPROCESSED.wav
Analag's way :
http://pagesperso-orange.fr/NBNS-Studio/PM670/pm670-analag-network.wav
SCAB Mode using Fairchild Position 2 setting :
http://pagesperso-orange.fr/NBNS-Studio/PM670/pm670-scab-fairchild-pos2.wav
SCAB Mode using custom Fairchild type TC network :
http://pagesperso-orange.fr/NBNS-Studio/PM670/pm670-scab-fairchild-custom.wav
Drum sounsamples :
Uncompressed :
http://pagesperso-orange.fr/NBNS-Studio/PM670/DRUMSNOCOMP.wav
Analags network :
http://pagesperso-orange.fr/NBNS-Studio/PM670/DRUMSANALAG.wav
Fairchild position 2 :
http://pagesperso-orange.fr/NBNS-Studio/PM670/DRUMSFAIR2.wav
Custom TC network 1 :
http://pagesperso-orange.fr/NBNS-Studio/PM670/DRUMSCUSTOM1.wav
Custom TC network2 :
http://pagesperso-orange.fr/NBNS-Studio/PM670/DRUMSCUSTOM2.wav
Thanks to SaMpLeGoD for the BOM with Banzai codes :
http://pagesperso-orange.fr/NBNS-Studio/PM670/BOM_for_Side_Chain_Amp_Boost_for_PM670.doc
Thanks to Moby for the wiring guide ! It can be found here :
http://pagesperso-orange.fr/NBNS-Studio/PM670/PoorMan+SCAB-WiringGuide-R1.pdf
Or you can read that ::
Fill the board ;D !!!
On the PSU board set RV1 and RV2 to have +17V and -17V.
Connect those +-17 to my board.
If you start filling the PM board, don't solder D1, D2, D3, D4, C4, R16 and R18. Put 2 wire links between C4 pads and R18 pads.
If they're already soldered, solder a wire link between the C4 pins and between R18 pins. I can't honestly say that's it is a good idea to dissolder C4 (even if I did) as it can endomage the PCB if not correctly done. Cut D1, D2, D3, D4 on the middle of the glass tube. Then keeping hot the pin solder, remove the half diodes. This is my tip to remove these diodes easily, without staying hot a too long time on the board.
TR4 output (secondary) goes directly on the SCAB board.
The SCAB "to attack" connector will be connected to the "attack" connector of the PM board.
The SCAB "attack" connector is the 10K pot of Analags network design.
The SCAB "MODEA-L or R" + MODEB-L or R" is where you connect the DPDT switch to change the MODE from "Analag's network" to "Your a la Fairchild network". There's unfortunately a 1 dB overall gain raise when not in "Analag's mode". There are 3 pads added to solve this but we will talk about this later.
Put the SCAB in "analag's mode", set RVx01 so the SCAB "to attack" connector pin to pin reads 0V DC on multimeter.
If you solder a 2uF in Cx03 place, you've got the Fairchild POS 2 setting when switched in "a la Fairchild mode".
Here you are, ready to experiment !
Play, have fun and feel free to post here...
EDIT : Read my "pimping my own pimp" post on second page to have a really well working mod !