Diezel VH4 Pedal  [schematic]

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

Re: Diezel VH4 Pedal [Gut shots]  [schematic]

Postby zamguitar » 22 Dec 2016, 19:39

VH4 PEDAL.png
You do not have the required permissions to view the files attached to this post.

For this message the author zamguitar has received thanks: 10
bmxguitarsbmx (20 Jun 2017, 18:53), Fermusicman (12 Jan 2017, 03:43), gu50-freak (21 Mar 2017, 20:07), Manfred (22 Dec 2016, 21:01), modman (20 Jun 2017, 12:07), Mr. Octopus (06 May 2017, 12:07), orcl2 (02 Apr 2017, 14:57), rcustoms (22 Dec 2016, 20:34), RogerDude (13 Jan 2017, 12:26), sledgehammer (03 Feb 2017, 21:54)
zamguitar
 
Posts: 8
Joined: 10 Jan 2009, 17:27
Has thanked: 17 times
Have thanks: 11 times

Re: Diezel VH4 Pedal [Gut shots]

Postby rcustoms » 22 Dec 2016, 20:37

zamguitar wrote:
VH4 PEDAL.png

is 100% ok or there something so so in the final schematics
http://www.rcustomspedals.blogspot.com
guitars,pedals and amps.
@zuleta.rafael(Instagram)
User avatar
rcustoms
Resistor Ronker
 
Posts: 393
Joined: 01 Oct 2009, 15:12
Location: COLOMBIA
Has thanked: 274 times
Have thanks: 448 times

Re: Diezel VH4 Pedal [Gut shots]

Postby Manfred » 22 Dec 2016, 21:09

D3,D4 looks like D1,D2,D5,D6 to me.
Did you measure the Diodes?
Manfred
Resistor Ronker
 
Posts: 366
Joined: 05 Apr 2009, 00:42
Has thanked: 657 times
Have thanks: 246 times

Re: Diezel VH4 Pedal [Gut shots]

Postby zamguitar » 22 Dec 2016, 21:18

rcustoms wrote:
zamguitar wrote:
VH4 PEDAL.png

is 100% ok or there something so so in the final schematics



Didn't build yet. But I'm pretty sure that the schem will give close results.

Just need to figure out the D3 and D4 zener values.
zamguitar
 
Posts: 8
Joined: 10 Jan 2009, 17:27
Has thanked: 17 times
Have thanks: 11 times

Re: Diezel VH4 Pedal [Gut shots]

Postby zamguitar » 22 Dec 2016, 21:21

Manfred wrote:D3,D4 looks like D1,D2,D5,D6 to me.
Did you measure the Diodes?



Just drew from the pictures, D3 and D4 are indeed 500mW zener diodes with the 1n5XX code.
zamguitar
 
Posts: 8
Joined: 10 Jan 2009, 17:27
Has thanked: 17 times
Have thanks: 11 times

Re: Diezel VH4 Pedal [Gut shots]

Postby rcustoms » 22 Dec 2016, 22:46

awesome work zamguitar,i design the pcb layout ,in this days
http://www.rcustomspedals.blogspot.com
guitars,pedals and amps.
@zuleta.rafael(Instagram)

For this message the author rcustoms has received thanks:
zamguitar (22 Dec 2016, 23:12)
User avatar
rcustoms
Resistor Ronker
 
Posts: 393
Joined: 01 Oct 2009, 15:12
Location: COLOMBIA
Has thanked: 274 times
Have thanks: 448 times

Re: Diezel VH4 Pedal [Gut shots]

Postby Manfred » 23 Dec 2016, 00:05

zamguitar wrote:
Manfred wrote:D3,D4 looks like D1,D2,D5,D6 to me.
Did you measure the Diodes?



Just drew from the pictures, D3 and D4 are indeed 500mW zener diodes with the 1n5XX code.


Thanks!

For this message the author Manfred has received thanks:
zamguitar (23 Dec 2016, 00:06)
Manfred
Resistor Ronker
 
Posts: 366
Joined: 05 Apr 2009, 00:42
Has thanked: 657 times
Have thanks: 246 times

Re: Diezel VH4 Pedal [Gut shots]

Postby Manfred » 23 Dec 2016, 00:16

Who can check the clipping voltages of both polarities with an oscilloscope?
Manfred
Resistor Ronker
 
Posts: 366
Joined: 05 Apr 2009, 00:42
Has thanked: 657 times
Have thanks: 246 times

Re: Diezel VH4 Pedal [Gut shots]

Postby Manfred » 23 Dec 2016, 00:29

Why does the edit function sometimes not work?

I meant the pointed out position.

CheckPoint.png
You do not have the required permissions to view the files attached to this post.
Manfred
Resistor Ronker
 
Posts: 366
Joined: 05 Apr 2009, 00:42
Has thanked: 657 times
Have thanks: 246 times

Re: Diezel VH4 Pedal [Gut shots]

Postby mozwell » 23 Dec 2016, 02:15

A simple way to check what the zener is without removing it.
POWER OFF the unit
Get a 9V battery, connect battery negative to the anode of the zener, connect the cathode of the zener to the 9V battery positive THROUGH A 1k RESISTOR.
Using a multimeter, measure the voltage across the zener

I would guess these are 3.3V zeners, or maybe even as low as 2.4V
mozwell
Breadboard Brother
 
Posts: 111
Joined: 12 Mar 2009, 00:01
Location: Melbourne, Australia
Has thanked: 22 times
Have thanks: 66 times

Re: Diezel VH4 Pedal [Gut shots]

Postby Manfred » 23 Dec 2016, 02:52

Manfred wrote:Why does the edit function sometimes not work?

I meant the pointed out position.

CheckPoint.png


You are right, that is the easiest way to measure the zener voltages. :thumbsup
Manfred
Resistor Ronker
 
Posts: 366
Joined: 05 Apr 2009, 00:42
Has thanked: 657 times
Have thanks: 246 times

Re: Diezel VH4 Pedal [Gut shots]

Postby Manfred » 23 Dec 2016, 12:47

A simple way to check what the zener is without removing it.
POWER OFF the unit
Get a 9V battery, connect battery negative to the anode of the zener, connect the cathode of the zener to the 9V battery positive THROUGH A 1k RESISTOR.
Using a multimeter, measure the voltage across the zener

I would guess these are 3.3V zeners, or maybe even as low as 2.4V


Here again, I quote my self in the last post . :slap:

You are right, that is the easiest way to measure the zener voltages. :thumbsup
Manfred
Resistor Ronker
 
Posts: 366
Joined: 05 Apr 2009, 00:42
Has thanked: 657 times
Have thanks: 246 times

Re: Diezel VH4 Pedal [Gut shots]

Postby sebjus » 04 Jan 2017, 10:48

Hi. anyone build a VH4 klone, based on a this schematic?
sebjus
 
Posts: 3
Joined: 13 Sep 2016, 12:15
Has thanked: 0 time
Have thanks: 2 times

Re: Diezel VH4 Pedal [Gut shots]

Postby RogerDude » 25 Jan 2017, 14:58

Hi, thanks for the schematic! I was waiting for this :)

I've build it and it looks like there is some kind of problem around IC1.
It generates a high pitch noise and seems to have something like a grounding issue or some kind of connection missing.
The gain pot reacts more like and gain on/off switch then gradually changing gain level.
After IC1 it seems to be working ok (EQ, pres, deep). The mistake might be in my build but I have checked it pretty thoroughly.

Anybody else who has build this?
Any thoughts? Different results?
RogerDude
 
Posts: 1
Joined: 03 Jan 2017, 11:47
Has thanked: 1 time
Have thanks: 0 time

Re: Diezel VH4 Pedal [Gut shots]

Postby sledgehammer » 03 Feb 2017, 21:53

Howdy, any news on the build and troubleshooting or other builds? By the way: nice work so far!
User avatar
sledgehammer
 
Posts: 9
Joined: 10 Aug 2007, 12:26
Has thanked: 4 times
Have thanks: 0 time

Re: Diezel VH4 Pedal [Gut shots]

Postby Jan1966 » 14 Feb 2017, 18:09

Any movement on this? Been waiting to build. Is the schematic correct?
Jan1966
 
Posts: 16
Joined: 15 Dec 2014, 20:17
Has thanked: 3 times
Have thanks: 4 times

Re: Diezel VH4 Pedal [Gut shots]

Postby Danila-Master » 03 Mar 2017, 14:51

Bump !
Any updates regarding schematic ?
Danila-Master
 
Posts: 9
Joined: 30 Jun 2013, 11:12
Has thanked: 1 time
Have thanks: 0 time

Re: Diezel VH4 Pedal [Gut shots]

Postby gu50-freak » 21 Mar 2017, 19:29

Hi together,

The diodes are 1N5232. Could read 1N5 on one of them and 232 on the other one.
Measured both with app. 5.6V.

Regards

For this message the author gu50-freak has received thanks: 3
bmxguitarsbmx (21 Jun 2017, 04:39), sledgehammer (22 Mar 2017, 18:59), zamguitar (21 Mar 2017, 23:06)
gu50-freak
 
Posts: 1
Joined: 21 Mar 2017, 18:49
Has thanked: 1 time
Have thanks: 3 times

Re: Diezel VH4 Pedal [Gut shots]

Postby Dave37LP » 29 Mar 2017, 08:02

Apparently the voltages of the D3 & D4 zeners are labelled on their respective silksreen layouts, under the diodes, they could be read as "5V6" for instance. Please try to bend the leads carefully to verify my guess, make us that favor.
Thanks in advance.

Dave
Dave37LP
 
Posts: 6
Joined: 25 Mar 2011, 17:28
Has thanked: 23 times
Have thanks: 1 time

Re: Diezel VH4 Pedal [Gut shots]

Postby zender » 01 Jun 2017, 22:54

Subtle bump by someone without the skill to trace this thing ang looking forward to the verified schematic. :horsey:
zender
 
Posts: 9
Joined: 13 Jan 2017, 19:45
Has thanked: 4 times
Have thanks: 0 time

PreviousNext

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

Who is online

Users browsing this forum: teknoman2 and 15 guests