Welcome, Guest. Please login or register.

August 06, 2020, 11:27:02 PM

Login with username, password and session length

Recent Posts

 

Author Topic: JCM 900 SL-X Emulator/Simulator/Adaptation  (Read 10554 times)

THChrist

  • Master
  • ***
  • Posts: 52
  • Chip Points: 2
    • View Profile
JCM 900 SL-X Emulator/Simulator/Adaptation
« on: February 18, 2009, 10:18:29 PM »
Hello everyone.
A few days ago, I was thinkin' about making some of the best emulators/simulators/adaptations of the classic ones. What I wanted to do is something like a JVM: 3 modes per channel. But, since 3 channels is enough for me (the JVM uses 4 channels, 3 modes per channel = 12 modes), my obsession led me to separate 3 groups for my project:

Channel 1 "Clean": Only Fender
A-Vibin' Champ
B-Professor Tweed
C-Bassboy 59

Channel 2 "Overdrive": Only Marshall
A-Plexizer
B-JCM800
C-???

Channel 3 "Distortion": Only Mesa/Boogie
A-Uno
B-Boogeyman
C-Dr. Boogey

As you can see (ok, ok, i'm a bit obssessive-compulsive, i know, please don't laugh) I needed a 3rd mode for the marshall, so i took the evolution of the jcm800, the JCM900 SL-X, which was an improved version of the JCM900 (without clipping diodes and with 1 aditional valve).

So here it is, another F4T project:



Q : MPF102 (all of 'em)

I took ROG's Phase Inverter/Poweramp thingy, since it's almost the same as in the 1959SLP, JCM800 and JCM900. I wanted (and so did Marshall) this to sound like a hot-rodded JCM800. However, if you need some original values for the P.I., here they are:

VR7= B25k
R17= 1k
R18= 15k
C22= 47n

Also, most of the preamp emulators uses a 10k instead of the 100k (of the source-follower?) and since everybody's doin' it, and i just wanted to be popular, i did the same, he he he (R4 and R13).

Miller Caps: C13, 14, 15, 16, 17, 18, 20 and 23 (try values between 100p and 220p)

I'll try to upload some clips when i finish the emulator (yes, i said it).

Thanx to all who inspired me: the guys at ROG & DIYStompboxes (Marty, Electrictabs, Mojotron)

BTW, this thing doesn't have a name yet, so if you have something clever, please let me know

i have:

Markfour X (since this model is based on the MkIV)
eXploder
X-tender
and a lot of crappy names...

ubaid88

  • Chipper
  • *
  • Posts: 1
  • Chip Points: 0
    • View Profile
Re: JCM 900 SL-X Emulator/Simulator/Adaptation
« Reply #1 on: October 06, 2009, 07:49:13 AM »
can you share your pcb layout for this.

Brymus

  • Elite
  • ****
  • Posts: 139
  • Chip Points: 10
  • SS amps are cool too.
    • View Profile
Re: JCM 900 SL-X Emulator/Simulator/Adaptation
« Reply #2 on: October 06, 2009, 02:10:47 PM »
SWEET,
You should post this at DIYstomboxes too.I bet the guys there will get a kick out of it.
Thanx for sharing.

THChrist

  • Master
  • ***
  • Posts: 52
  • Chip Points: 2
    • View Profile
Re: JCM 900 SL-X Emulator/Simulator/Adaptation
« Reply #3 on: October 06, 2009, 02:20:59 PM »