Mesa Boogie - Throttle Box  [schematic]

All about modern commercial stompbox circuits from Electro Harmonix over MXR, Boss and Ibanez into the nineties.

Re: Mesa Boogie - Throttle Box

Postby ferhdas » 27 Nov 2016, 04:21

Hi guys,
caprotesta wrote:I'm curious about D2. Previous posts have said that this is a ZPY diode. Looking at the picture, it looks like Zener diode, but does anybody know what value it is?

Thank you.


Thanks!
ferhdas
 
Posts: 1
Joined: 11 Jul 2016, 18:02
Has thanked: 0 time
Have thanks: 0 time

Re: Mesa Boogie - Throttle Box

Postby askwho69 » 08 Dec 2016, 13:51

Hi does anyone sellibg PCB on this? I know this thread is old but, maybe someone has extra pcb on this. :scratch:
askwho69
 
Posts: 14
Joined: 03 Aug 2015, 13:44
Has thanked: 3 times
Have thanks: 0 time

Re: Mesa Boogie - Throttle Box

Postby juan_felt » 09 May 2017, 20:12

Hi,

One question, if I wanted to add a 3 band eq to this pedal instead of the tone and mids switch, where in the circuit should I do this?
I'd like to use a 3 band baxandall I already (succesfully) used in a BSIAB.

Thanks!
juan_felt
 
Posts: 6
Joined: 05 Sep 2011, 15:33
Has thanked: 0 time
Have thanks: 0 time

Re: Mesa Boogie - Throttle Box

Postby ballfire » 11 Dec 2017, 04:21

hello..

its ok not to use the inductor on this pedal?? cause i dont have a inductor here..

thanks
ballfire
Resistor Ronker
 
Posts: 280
Joined: 12 Apr 2011, 06:37
Has thanked: 20 times
Have thanks: 0 time

Re: Mesa Boogie - Throttle Box

Postby sego91 » 09 Apr 2018, 12:54

Hey guys! I just finished some PCBs for the project. Works amazing! One of the best High gain Drives I've ever tried.

I have some extra boards if someone is looking to build this project, I'll let them go for cheap cause they were made as prototypes, still a couple of things to correct and improve! :D



Image

Image

And here a video of my build :)

https://pcbguitarmania.com/wp-content/uploads/2018/03/mesa-project.mp4

For this message the author sego91 has received thanks:
sixthfloor (10 Apr 2018, 08:06)
sego91
 
Posts: 8
Joined: 02 Oct 2013, 18:10
Location: Prague, Czech Republic
Has thanked: 6 times
Have thanks: 8 times

Re: Mesa Boogie - Throttle Box

Postby caspercody » 02 Dec 2018, 01:00

Sego91

I ordered your Throttle box PCB, along with a Green Screamer back on 11/07. I have not received them, nor have I gotten any return emails with tracking information??

So I thought I would try on here, since I saw you were just on here.

Thanks
Rob
caspercody
Resistor Ronker
 
Posts: 263
Joined: 15 Jul 2009, 15:34
Has thanked: 30 times
Have thanks: 38 times

Re: Mesa Boogie - Throttle Box

Postby caspercody » 02 Dec 2018, 16:08

Deleted
caspercody
Resistor Ronker
 
Posts: 263
Joined: 15 Jul 2009, 15:34
Has thanked: 30 times
Have thanks: 38 times

Re: Mesa Boogie - Throttle Box

Postby jhergonz » 10 Dec 2018, 05:02

still can't understand why the c19 must be connected to ground if the circuit is bypassed ... :scratch: :scratch: :scratch: :hmmm: , can anybody explain? please?
jhergonz
 
Posts: 22
Joined: 29 Mar 2018, 07:28
Location: Philippines
Has thanked: 41 times
Have thanks: 0 time

Re: Mesa Boogie - Throttle Box

Postby Dirk_Hendrik » 11 Dec 2018, 11:49

C19 has been raised a few times in this thread and the question is not solved.

In my opinion, when a gain pedal is bypassed, the (input of the) circuit should be tamed so it will not go into oscillations, buzzing noises or whatever else. That means that one would want to reduce the gain in such an occasion. When "grounding" the inverting input of the opamp like this the gain of that amplifier stage goes through the roof, (either 390k or 47k divided by the impedance of C19 plus 1) and the higher the frequency, the higher the gain. I cannot imagine this cap is correct in this application and either Mesa or Apollo missed something.
Sorry. Plain out of planes.

http://www.dirk-hendrik.com
User avatar
Dirk_Hendrik
Old Solderhand
 
Posts: 4179
Joined: 03 Jul 2007, 09:44
Location: Old Amsterdam
Has thanked: 251 times
Have thanks: 1010 times

Previous

Return to Modern Stompbox Effects (1975 - ...)

Who is online

Users browsing this forum: cambarus, kleuck and 13 guests