Danelectro - DJ-24 French Fries Autowah  [schematic]

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

Danelectro - DJ-24 French Fries Autowah  [schematic]

Postby Bernardduur » 05 Feb 2013, 12:25

Got one in for a rehouse and decided to trace it :)

[Updated schematic below]
'No more....... loud music.......'

For this message the author Bernardduur has received thanks: 8
asimplesample (17 Feb 2013, 00:59), Fredenando (05 Feb 2013, 19:54), guycapuano (25 Feb 2013, 01:16), induction (05 Feb 2013, 16:33), IvIark (05 Feb 2013, 20:32), lolbou (05 Feb 2013, 13:53), modman (09 Feb 2013, 16:16), rcustoms (09 Mar 2013, 14:32)
Bernardduur
Transistor Tuner
 
Posts: 1141
Joined: 24 Aug 2007, 08:36
Location: Losser.........
Has thanked: 87 times
Have thanks: 482 times

Re: Danelectro - French Fries

Postby Bernardduur » 05 Feb 2013, 12:26

Oh, I did not add the whole switching bit as that is the same as in all these small Danelectro pedals........ Guess it would be online somewhere
'No more....... loud music.......'
Bernardduur
Transistor Tuner
 
Posts: 1141
Joined: 24 Aug 2007, 08:36
Location: Losser.........
Has thanked: 87 times
Have thanks: 482 times

Re: Danelectro - French Fries

Postby IvIark » 05 Feb 2013, 21:31

Thanks Bernard, is VR102 a trimmer? What does it do?
"If anyone is a 'genius' for putting jacks in such a pedal in the only spot where they could physically fit, then I assume I too am a genius for correctly inserting my legs into my pants this morning." - candletears7 - TGP
User avatar
IvIark
Tube Twister
 
Posts: 2297
Joined: 02 Jan 2008, 00:59
Location: Manchester UK
Has thanked: 667 times
Have thanks: 676 times

Re: Danelectro - French Fries

Postby Bernardduur » 05 Feb 2013, 23:26

IvIark wrote:Thanks Bernard, is VR102 a trimmer? What does it do?


Yep!

I think it sets the range of the transistor
'No more....... loud music.......'

For this message the author Bernardduur has received thanks:
IvIark (06 Feb 2013, 00:30)
Bernardduur
Transistor Tuner
 
Posts: 1141
Joined: 24 Aug 2007, 08:36
Location: Losser.........
Has thanked: 87 times
Have thanks: 482 times

Re: Danelectro - French Fries

Postby IvIark » 06 Feb 2013, 02:07

This seems to cover it.

Image
"If anyone is a 'genius' for putting jacks in such a pedal in the only spot where they could physically fit, then I assume I too am a genius for correctly inserting my legs into my pants this morning." - candletears7 - TGP

For this message the author IvIark has received thanks: 4
asimplesample (17 Feb 2013, 01:00), guycapuano (25 Feb 2013, 01:17), modman (09 Feb 2013, 16:16), Sva99.rev1 (30 Sep 2018, 16:56)
User avatar
IvIark
Tube Twister
 
Posts: 2297
Joined: 02 Jan 2008, 00:59
Location: Manchester UK
Has thanked: 667 times
Have thanks: 676 times

Re: Danelectro - French Fries

Postby tube-exorcist » 06 Feb 2013, 03:53

I would suggest: a clone of the EH Doctor Q....
"I've noticed there's an inverse relationship between cost of gear and talent. If you need the most expensive gear to get decent tones, then you suck as a player."
tube-exorcist
Cap Cooler
 
Posts: 465
Joined: 05 Jul 2007, 21:09
Has thanked: 210 times
Have thanks: 77 times

Re: Danelectro - French Fries

Postby Bernardduur » 06 Feb 2013, 09:08

Sure looks like it! With some mods........
'No more....... loud music.......'
Bernardduur
Transistor Tuner
 
Posts: 1141
Joined: 24 Aug 2007, 08:36
Location: Losser.........
Has thanked: 87 times
Have thanks: 482 times

Re: Danelectro - French Fries

Postby guycapuano » 26 Feb 2013, 21:28

IvIark wrote:This seems to cover it.

[ Image ]


Thanks for the layout guys, built it, one of the ranges sound incredible, the others volume is lower but actually still sounds good. Huge pop to maybe add a pull down to the layout?
User avatar
guycapuano
Breadboard Brother
 
Posts: 141
Joined: 21 Jul 2011, 23:36
Has thanked: 32 times
Have thanks: 10 times

Re: Danelectro - French Fries

Postby Bernardduur » 26 Feb 2013, 21:53

Change R112 to 1M to ground..... the 100k to Vref is left over from the switching which is done on the main board and has no real function here!!
'No more....... loud music.......'
Bernardduur
Transistor Tuner
 
Posts: 1141
Joined: 24 Aug 2007, 08:36
Location: Losser.........
Has thanked: 87 times
Have thanks: 482 times

Re: Danelectro - French Fries

Postby guycapuano » 27 Feb 2013, 02:01

Something's off, the volume of the effect is not right, and in High range it's really bad :(
User avatar
guycapuano
Breadboard Brother
 
Posts: 141
Joined: 21 Jul 2011, 23:36
Has thanked: 32 times
Have thanks: 10 times

Re: Danelectro - French Fries

Postby Bernardduur » 27 Feb 2013, 08:38

These units have a volume issue..........
'No more....... loud music.......'
Bernardduur
Transistor Tuner
 
Posts: 1141
Joined: 24 Aug 2007, 08:36
Location: Losser.........
Has thanked: 87 times
Have thanks: 482 times

Re: Danelectro - French Fries

Postby guycapuano » 27 Feb 2013, 14:39

Bernardduur wrote:These units have a volume issue..........


Oh well that makes sense :applause:

I cant seem to figure out which value to tweak to raise it up. THe Low side needs a small bump, and the high side needs some serious help. Tonally this thing sounds REALLY GOOD. Any thoughts on that?
User avatar
guycapuano
Breadboard Brother
 
Posts: 141
Joined: 21 Jul 2011, 23:36
Has thanked: 32 times
Have thanks: 10 times

Re: Danelectro - French Fries

Postby tube-exorcist » 27 Feb 2013, 15:21

guycapuano wrote:I cant seem to figure out which value to tweak to raise it up. ..... Any thoughts on that?

Oh yes... my thought:
Did you ever have a look at the Electro-Harmonix Doctor Q schematic ?
"I've noticed there's an inverse relationship between cost of gear and talent. If you need the most expensive gear to get decent tones, then you suck as a player."
tube-exorcist
Cap Cooler
 
Posts: 465
Joined: 05 Jul 2007, 21:09
Has thanked: 210 times
Have thanks: 77 times

Re: Danelectro - French Fries

Postby SmoothActionAAA » 02 Mar 2013, 16:53

A buffer in front of my FF vero build dramatically improves both low and hi options. In tone and volume, just better general response. I'm still getting nice POW when engaged, it's the only pedal I've built that doubles as a bass kick.
SmoothActionAAA
 
Posts: 3
Joined: 07 Oct 2011, 03:10
Has thanked: 1 time
Have thanks: 0 time

Re: Danelectro - French Fries

Postby ppluis0 » 08 Mar 2013, 23:42

Hi there,

Bernard, can you confirm that the resistors labeled R109 and R111 really are of 4K7 in your unit ??

I'm asking this due all diagrams related EH Dr Q indicates 47K at these two positions and may be the cause of the loss in volume that guycapuano reports.

Cheers,
Jose

For this message the author ppluis0 has received thanks: 2
guycapuano (10 Mar 2013, 00:08), IvIark (09 Mar 2013, 23:51)
User avatar
ppluis0
Cap Cooler
 
Posts: 532
Joined: 14 Jul 2010, 19:33
Location: Argentina
Has thanked: 34 times
Have thanks: 72 times

Re: Danelectro - French Fries

Postby Bernardduur » 09 Mar 2013, 16:30

Ouch, true, those resisors were 47k; the orange band really looks red but measured they all make 47k!

[updated scheme below]

Mods, please delete first schematic plz!
'No more....... loud music.......'
Bernardduur
Transistor Tuner
 
Posts: 1141
Joined: 24 Aug 2007, 08:36
Location: Losser.........
Has thanked: 87 times
Have thanks: 482 times

Re: Danelectro - French Fries

Postby IvIark » 09 Mar 2013, 16:57

Original schematic removed and vero layout updated
"If anyone is a 'genius' for putting jacks in such a pedal in the only spot where they could physically fit, then I assume I too am a genius for correctly inserting my legs into my pants this morning." - candletears7 - TGP
User avatar
IvIark
Tube Twister
 
Posts: 2297
Joined: 02 Jan 2008, 00:59
Location: Manchester UK
Has thanked: 667 times
Have thanks: 676 times

Re: Danelectro - French Fries

Postby guycapuano » 09 Mar 2013, 22:30

Bernardduur wrote:Ouch, true, those resisors were 47k; the orange band really looks red but measured they all make 47k!

Danelectro - French Fries.JPG


Mods, please delete first schematic plz!

Ohhh schnitkees, makes sense :applause:
User avatar
guycapuano
Breadboard Brother
 
Posts: 141
Joined: 21 Jul 2011, 23:36
Has thanked: 32 times
Have thanks: 10 times

Re: Danelectro - French Fries

Postby ppluis0 » 09 Mar 2013, 23:05

Folks, please send me some gratitude. (I'm somewhat low self-esteem these days and if you do click some thumbs up would help me a lot... :lol: )

Guycapuano: please tell us when you replace this couple of resistors to know if this solve your volume issue.

Also, make an input buffer to avoid load your guitar (in case you plug it directly to this pedal), can be useful.

Look at this diagram and place a fet and some resistors and tell us what happens: http://www.muzique.com/schem/quack.gif

Cheers,
Jose

For this message the author ppluis0 has received thanks: 4
Bernardduur (11 Mar 2013, 08:43), Intripped (10 Mar 2013, 03:19), IvIark (09 Mar 2013, 23:51), SmoothActionAAA (10 Mar 2013, 17:30)
User avatar
ppluis0
Cap Cooler
 
Posts: 532
Joined: 14 Jul 2010, 19:33
Location: Argentina
Has thanked: 34 times
Have thanks: 72 times

Re: Danelectro - French Fries

Postby Bernardduur » 11 Mar 2013, 08:47

And make R103 also 47k; I thought I checked em all but when compared to the 'original' schematic this error appeared!!
'No more....... loud music.......'
Bernardduur
Transistor Tuner
 
Posts: 1141
Joined: 24 Aug 2007, 08:36
Location: Losser.........
Has thanked: 87 times
Have thanks: 482 times

Next

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

Who is online

Users browsing this forum: acast83, Feral Feline, Google [Bot], metalwanderer, strangeblooms and 16 guests