So far... some differences from V4 rev 1.5
+- 9V
Extra gin stage is switched by using MMBFJ112
Some resistors are not pupulated on the PCB.
Search found 184 matches
- 05 Mar 2023, 17:27
- Forum: Boutique Stompboxes dissected...
- Topic: JHS Morning Glory V4 [traced]
- Replies: 45
- Views: 14701
- 04 Mar 2023, 13:01
- Forum: Boutique Stompboxes dissected...
- Topic: JHS Morning Glory V4 [traced]
- Replies: 45
- Views: 14701
Re: JHS Morning Glory V4 [traced]
Hi everyone... Nice things here on V4 Rev 3.0 Bypass is achieved using a TLP291-4 and two TL072 that i assume are for buffering. The opto is controlled by a microcontroller. No more 3pdt's There is a charge pump and three LM833. The Diodes ar 1N4148 and red leds. i'm starting to desolder smd this we...
- 28 Jun 2020, 03:59
- Forum: Boutique Stompboxes dissected...
- Topic: K&K - Pure XLR Preamp [traced]
- Replies: 6
- Views: 2955
Re: K&K - Pure XLR Preamp [traced]
Hello, thanks so much!! Just one question, the 22uF capacitores are non-polarized?
- 11 Feb 2019, 00:50
- Forum: Boutique Stompboxes dissected...
- Topic: DSM OmniCabSim
- Replies: 60
- Views: 31549
Re: DSM OmniCabSim
Hi Daniel, Lucas here...from Chile. (Escribo en inglés por si alguien más se anima a responder). may i ask some questions about your design? What about using phantom power? What would be the values of the resistor and capacitor in the "ground lift" arrangement? Different values are used on...
- 02 Nov 2018, 15:17
- Forum: Circuit Blocks
- Topic: Trying to mod a Gyrator Eq
- Replies: 3
- Views: 4156
Re: Trying to mod a Gyrator Eq
Well... This is about the LR Baggs Para Acoustic DI. It's the mids control Still Playing with this... Today i've tried replacing the transistor, use more common values and the response looks similar to the original (400 Hz to 1.6kHz App.) There is a slight thifference on the "Q" RED: Origi...
- 01 Nov 2018, 21:09
- Forum: Circuit Blocks
- Topic: Trying to mod a Gyrator Eq
- Replies: 3
- Views: 4156
Trying to mod a Gyrator Eq
hello everyone! first of all... please, excuse my poor english :icon_confused: Hope you can help me... I´ve googled but, find no answer. I'm trying to trace and mod an acoustic guitar preamp that uses gyrator eq. The mid's section originally uses a 2n5485 (Right section on image below). Since they a...
- 13 Oct 2018, 05:13
- Forum: Boutique Stompboxes dissected...
- Topic: LR Baggs Para DI Acoustic Preamp
- Replies: 14
- Views: 7405
Re: LR Baggs Para DI Acoustic Preamp
Hello again... Well, much to do at work... It doesn't left much time to work on this. But here we are again. I've started the Eq section... specifically the presence control... I would like to understand how it works. The manual says that it works on the 5kHz range. The circuit part traced is on the...
- 07 Oct 2018, 21:25
- Forum: Boutique Stompboxes dissected...
- Topic: LR Baggs Para DI Acoustic Preamp
- Replies: 14
- Views: 7405
Re: LR Baggs Para DI Acoustic Preamp
This would be the power section .. Including the phantom power. Simulated on multisim and phantom led works ok but not the same with the "on" led. I have to re check those resistor values arround the IC1 B. Also...The IC is LMC6032. And "IN-RING" is conected to ground when the in...
- 03 Oct 2018, 11:44
- Forum: Boutique Stompboxes dissected...
- Topic: Wampler - Pantheon [traced]
- Replies: 38
- Views: 17170
Re: Wampler Pantheon [traced]
Even though many values will be a complete mystery...i'm interested on those photos! Thanks so much FeVeR2112!
- 11 Sep 2018, 17:35
- Forum: Boutique Stompboxes dissected...
- Topic: LR Baggs Para DI Acoustic Preamp
- Replies: 14
- Views: 7405
Re: LR Baggs Para DI Acoustic Preamp
Here we are back again... any comments?
- 07 Nov 2017, 18:07
- Forum: Boutique Stompboxes dissected...
- Topic: LR Baggs Para DI Acoustic Preamp
- Replies: 14
- Views: 7405
Re: LR Baggs Para DI Acoustic Preamp
Well...here we go. I have not had much time... To much to do at work. 1.- The unit uses 3 LMC6032. IC2a Eq IC2b Line balancing IC3a: Notch control freq. IC3b: Line balancing. IC1a used to control bass freq. IC1b used on this arrangement: cap val.PNG ¿it' possible to replace the LMC6032? (Not availab...
- 25 Oct 2017, 00:48
- Forum: Boutique Stompboxes dissected...
- Topic: LR Baggs Para DI Acoustic Preamp
- Replies: 14
- Views: 7405
Re: LR Baggs Para DI Acoustic Preamp
Apparently... the signal goes like this: Input-> Gain Stage- >Buffer -> Eq -> Phase invert and line balancing (DI) ->Out The Eq is based on this: http://www.geofex.com/article_folders/eqs/paramet.htm Tree fixed frecuencies usin transistors (treble, presence and bass) and two variabe frequencies (Not...
- 23 Oct 2017, 19:26
- Forum: Boutique Stompboxes dissected...
- Topic: LR Baggs Para DI Acoustic Preamp
- Replies: 14
- Views: 7405
Re: LR Baggs Para DI Acoustic Preamp
Not much in my country
- 22 Oct 2017, 22:58
- Forum: Boutique Stompboxes dissected...
- Topic: LR Baggs Para DI Acoustic Preamp
- Replies: 14
- Views: 7405
LR Baggs Para DI Acoustic Preamp
i've started tracing this yesterday... So far this is what i have Here is the power section... You can look at IC1 that pin 4 is not conected directly to ground. Somebody can explain this circuit block? (The unit may be phantom powered). LR2.PNG Here, C9 is a NON polarized capacitor (50v 22uf NP). I...
- 24 Sep 2017, 18:50
- Forum: Boutique Stompboxes dissected...
- Topic: Bondi Effects - Sick As Overdrive
- Replies: 24
- Views: 17868
Re: Bondi Effects - Sick As Overdrive
A while ago i've received this pictures... According to them... Sick As looks much like a Klon with Baxandall tone stack. Bass - B50K Treble - B50K BAX: 4n7/4n7 arround Treb Pot - 33n/33n/4.7k/4.7k Arround bass Pot - 33k/10k Betwen them... Just like the BB preamp or others. Level - A10K Clean/Drive ...
- 25 Aug 2017, 21:16
- Forum: Boutique Stompboxes dissected...
- Topic: Carl Martin - PlexiTone [traced]
- Replies: 251
- Views: 109929
- 05 Jul 2017, 15:29
- Forum: Boutique Stompboxes dissected...
- Topic: Walrus Audio - Deep Six Compressor [traced]
- Replies: 32
- Views: 28395
Re: Walrus Audio Deep Six Compressor [traced]
I have traced the original pedal... It has been already said that it's a BYOC 5 knob compressor with some minor adjustments.
There you have it all... it's a verified project, start tracing a PCB.
There you have it all... it's a verified project, start tracing a PCB.
- 26 Jun 2017, 06:05
- Forum: Boutique Stompboxes dissected...
- Topic: Bondi Effects - Sick As Overdrive
- Replies: 24
- Views: 17868
Re: Bondi Effects - Sick As Overdrive
From the website: "The Sick As Overdrive is a diversion from this well-worn path, taking its basic structure from the Klon Centaur® but with some major improvements for the modern player. The gain control serves a dual purpose— as the gain is increased, the ratio of gain-to-clean tone increases...
- 22 Mar 2017, 16:47
- Forum: Boutique Stompboxes dissected...
- Topic: Bondi Effects - Sick As Overdrive
- Replies: 24
- Views: 17868
Re: Bondi Effects - Sick As Overdrive
anyone who has the pedal? It would be great to have some photos from the PCB!
- 02 Sep 2016, 21:50
- Forum: Boutique Stompboxes dissected...
- Topic: Bondi Effects - Sick As Overdrive
- Replies: 24
- Views: 17868
Re: Bondi Effects - Sick As Overdrive
Found this on google...
It uses BB OPA 2134, blue diodes are BAT 46...
It uses BB OPA 2134, blue diodes are BAT 46...