Making Of Double D .. - diyAudio
Go Back   Home > Forums > Live Sound > Instruments and Amps

Instruments and Amps Everything that makes music, Especially including instrument amps.

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 29th July 2008, 02:01 PM   #1
kaushik is offline kaushik  India
diyAudio Member
 
Join Date: Jul 2008
Arrow Making Of Double D ..

Hi all ,

here i wil be putting my construction journey for my DIY Distortion padel for guitar .

The goal is to make a DOUBLE D clone given by the original author here :

http://www.runoffgroove.com/doubled.html
--------------------------------
The Idea :javascript:smilie('')

--------------------------------
I wanted to make a decent distortion pedal for my guitar , at a lesser expense .
Also wanted some thing of small foot print.
Online i got good reviews for the Double D . The simple design looked great ,
component count was less and .only 1 chip! CD 4049 ... power javascript:smilie('')packed with six
inverters .





some pics here
http://www.flickr.com/photos/kaushik...ags/mydoubled/
__________________
~AUDIO IS ..
FEELING ....THE WAY U LOVE THE SOUNDS TO SOUND
  Reply With Quote
Old 30th July 2008, 06:52 AM   #2
kaushik is offline kaushik  India
diyAudio Member
 
Join Date: Jul 2008
Default past logs:MY Double D

The construction started some time back ...however ...the early days are logged here

DAY1: Making of 'MY Double D' guitar distortion

12:46 PM 6/26/2008>
[Thursday]

-today is the first day
i just did the purchasing part [at sp road,bangalore,india]

tools and components costedd roughlt 4$ .[ 160 INR ]..

-getting the J-FETs was a pain ..i replaced the J209 with J 112


I Have one doubt : Wheather J112 J-FET (similar specs.) will serve as a equivalent for J209 ????

-taken the pictures
-read the runoffgroove.com author's page on my laptop ......today just got time to plan the component placements
-prepared some wires such as HOOKUP wires [1 solid wire strand type] and flexible connecting wires


note i will use a verro/General Purpose Board for the prototype ..after modifications ... i will order PCBs




DAY2: the placing components and soldering
9:38 AM 6/27/2008 >


yesterday the following were purchased
-Capacitor box , all the reqd pfs (they call the ceramic disc cps as pfs here ) , it was lacking some of the required values
so extra capacitors also purchased
still some are missing line 47kpf etc ,plan to purchase today ...
-IC CD 4049 ,2 J -FETs j112 [as a replace ment for the J109 ] ,vendor told it should match the
actual one upto 90%
-Ribbon wire 6 core , 1 mtr , for the pots ,
-Mic jack and socket , for testing phase i am using a cheap mic jack 10 Rs and Mic socket
-Electorlytics 10uf and 4.7uf ,diodes 1N4007 [for reducing mains supply to the soldering iron ..heh not part of original double d]
-A cutter and Stripper , to be used wire and leg cutter,twizer ..may be helpful to hold hot parts,small parts
-A soap box ...wait its a temporary cabinet to hold the SIX POTS ,and the mic jack ..battery etc what so-ever

- also a thin soap box is . easy to drill ... with some heated iron ..my new trick



The already exiting parts
- resistor box , still some missing values like 1 M , 2.2 M , 220K etc
soo i have to add today
-solder materials
-hook up wire , wires with one solid strand
-favicol,all knows its a famous adhesive here ..has to be used for a special purpose see below
-Added the components to the board [yellow verro board for a test run]


The disaster ..
My cheap [25 INR] soldering iron died !
- so just the components are added to the verro board as per the plan in the website ,
This saves time !

- and i used *favicol* to hold them in place as i could not solder the components
[usually after the legs are bent and shortened ,normally i put it on the board
thru-holes ...they tend to fall out if not soldered immediately ..afvicol saves from this trouble ]
-finally i was able to visualize how the assembled circuit will look after it is done

to do:
-Buy a good soldering iron , missing parts ,extra solder wires , shielded wires
-then the solder the board
-solder the ribbons to the pots ,fit in the soap box
-test by connecting to the pocket AMP
(...my secret tiny amp ..runs on 9V battery )

-Add a killer looking final cabinet ..keep watching
__________________
~AUDIO IS ..
FEELING ....THE WAY U LOVE THE SOUNDS TO SOUND
  Reply With Quote
Old 30th July 2008, 06:52 AM   #3
kaushik is offline kaushik  India
diyAudio Member
 
Join Date: Jul 2008
---past logs :MY DOUBLE D----

Day3: Making of 'MY Double D' guitar distortion
9:34 AM 6/29/2008 SUNDAY

-Bought SOLDRON make soldering iron

About:
The iron is of good quality , uses ceramic heater element ,
it is very fast heating approx 6 seconds all ti take to reach a peak
temperature remains steady at that temperature




- Today I finished partially assembled the thing
- Just 2 Pots are conncted as I planned to test JIGGLE section
- A MIC Jack as input and output through a MIC socket

1 st test
- I have connected the unit to the 9v battery
- connected my guitar and MINI AMP from the out put
- "No sounds" !!! meaning 1 st test failed

I am not worried as i buit 200+ small circuit projects :


suspects >

1. DRY JOINTS , i bought good quality soldering wire
2.MAY BE THE IC DIED : IC CD 4049 is a CMOS device..sensitive to temperature ... as i did lott of soldering in the past
i avoided to use a IC base ... may be during the asembly the IC died


Diagnosis

- Tested the FETs by isolating and applying +ve gate voltage using 100K resistor ,a test LED comnected between Source and Gnd.
As i apply the +ve bias the LED glows bright ... soo FETs are alive !

- Visually checked the IC connections ....all ok ..

-Next I will do some electrical continuity test ,all seems fine ......

next plan ---FRESH REASSEMBLY-- :

i think better i will re assemble the board with 1 IC base , that will save lott of time ... later i will diagnose the not -working board
-Done the reassembly halfway ...
__________________
~AUDIO IS ..
FEELING ....THE WAY U LOVE THE SOUNDS TO SOUND
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Double BR vs BR? Brisso57 Full Range 3 28th March 2008 02:30 AM
DIY double sided PCB making sss Parts 2 10th June 2006 07:16 PM
double-TL useful? el`Ol Full Range 8 19th December 2005 12:04 PM
Double rail PSU, double ground rail connexion ? youyoung21147 Chip Amps 5 6th November 2005 05:12 PM
about double tl~ bigcatdairy Multi-Way 0 29th September 2005 02:51 PM


New To Site? Need Help?

All times are GMT. The time now is 03:51 AM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2