Search found 184 matches

by lukatosh
05 Mar 2023, 17:27
Forum: Boutique Stompboxes dissected...
Topic: JHS Morning Glory V4 [traced]
Replies: 45
Views: 14693

Re: JHS Morning Glory V4 [traced]

So far... some differences from V4 rev 1.5

Image

+- 9V

Extra gin stage is switched by using MMBFJ112

Some resistors are not pupulated on the PCB.
by lukatosh
04 Mar 2023, 13:01
Forum: Boutique Stompboxes dissected...
Topic: JHS Morning Glory V4 [traced]
Replies: 45
Views: 14693

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...
by lukatosh
28 Jun 2020, 03:59
Forum: Boutique Stompboxes dissected...
Topic: K&K - Pure XLR Preamp [traced]
Replies: 6
Views: 2945

Re: K&K - Pure XLR Preamp [traced]

Hello, thanks so much!! Just one question, the 22uF capacitores are non-polarized?
by lukatosh
11 Feb 2019, 00:50
Forum: Boutique Stompboxes dissected...
Topic: DSM OmniCabSim
Replies: 60
Views: 31489

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...
by lukatosh
02 Nov 2018, 15:17
Forum: Circuit Blocks
Topic: Trying to mod a Gyrator Eq
Replies: 3
Views: 4154

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...
by lukatosh
01 Nov 2018, 21:09
Forum: Circuit Blocks
Topic: Trying to mod a Gyrator Eq
Replies: 3
Views: 4154

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...
by lukatosh
13 Oct 2018, 05:13
Forum: Boutique Stompboxes dissected...
Topic: LR Baggs Para DI Acoustic Preamp
Replies: 14
Views: 7402

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...
by lukatosh
07 Oct 2018, 21:25
Forum: Boutique Stompboxes dissected...
Topic: LR Baggs Para DI Acoustic Preamp
Replies: 14
Views: 7402

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...
by lukatosh
03 Oct 2018, 11:44
Forum: Boutique Stompboxes dissected...
Topic: Wampler - Pantheon [traced]
Replies: 38
Views: 17165

Re: Wampler Pantheon [traced]

Even though many values will be a complete mystery...i'm interested on those photos! Thanks so much FeVeR2112!
by lukatosh
11 Sep 2018, 17:35
Forum: Boutique Stompboxes dissected...
Topic: LR Baggs Para DI Acoustic Preamp
Replies: 14
Views: 7402

Re: LR Baggs Para DI Acoustic Preamp

Here we are back again... any comments?
Prev.png
by lukatosh
07 Nov 2017, 18:07
Forum: Boutique Stompboxes dissected...
Topic: LR Baggs Para DI Acoustic Preamp
Replies: 14
Views: 7402

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...
by lukatosh
25 Oct 2017, 00:48
Forum: Boutique Stompboxes dissected...
Topic: LR Baggs Para DI Acoustic Preamp
Replies: 14
Views: 7402

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...
by lukatosh
23 Oct 2017, 19:26
Forum: Boutique Stompboxes dissected...
Topic: LR Baggs Para DI Acoustic Preamp
Replies: 14
Views: 7402

Re: LR Baggs Para DI Acoustic Preamp

Not much in my country :(
by lukatosh
22 Oct 2017, 22:58
Forum: Boutique Stompboxes dissected...
Topic: LR Baggs Para DI Acoustic Preamp
Replies: 14
Views: 7402

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...
by lukatosh
24 Sep 2017, 18:50
Forum: Boutique Stompboxes dissected...
Topic: Bondi Effects - Sick As Overdrive
Replies: 24
Views: 17860

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 ...
by lukatosh
25 Aug 2017, 21:16
Forum: Boutique Stompboxes dissected...
Topic: Carl Martin - PlexiTone [traced]
Replies: 251
Views: 109923

Re: Carl Martin - PlexiTone [traced]

Is there a way to reduce the bass frequency response of the pedal?
Roast7 wrote:Original Plexituna
[ Image ]

If I want to build only the Crunch mode, just need this part of the scheme??
[ Image ]

Then use a voltage regulator 9v to 12v right?
by lukatosh
05 Jul 2017, 15:29
Forum: Boutique Stompboxes dissected...
Topic: Walrus Audio - Deep Six Compressor [traced]
Replies: 32
Views: 28371

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.
by lukatosh
26 Jun 2017, 06:05
Forum: Boutique Stompboxes dissected...
Topic: Bondi Effects - Sick As Overdrive
Replies: 24
Views: 17860

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...
by lukatosh
22 Mar 2017, 16:47
Forum: Boutique Stompboxes dissected...
Topic: Bondi Effects - Sick As Overdrive
Replies: 24
Views: 17860

Re: Bondi Effects - Sick As Overdrive

anyone who has the pedal? It would be great to have some photos from the PCB!
by lukatosh
02 Sep 2016, 21:50
Forum: Boutique Stompboxes dissected...
Topic: Bondi Effects - Sick As Overdrive
Replies: 24
Views: 17860

Re: Bondi Effects - Sick As Overdrive

Found this on google...

It uses BB OPA 2134, blue diodes are BAT 46...