How fill a mn3007 in a mxr flanger clone!? Noob inside

[slash_83]

Hi guys!

I ve the some problem of most of you, i ve a mxr flanger clone with a bad sad1024 probably. I ve decided after many years to' resuscitate it...i ve bought a mn3007 and i build a daughterboard following the layout founded here..


I ve seen the new Schematic to fill mn3007, but im not surehow to' link daughterboard to' mxr pcb...someone could explain it a little more simplified..?

Thank you in advance!

[Fender3D]

I drew a schematic for an MXR flanger retrofit with MN3007... but I don't know what daughterboard you're talking about.
Anyway, you should have 6 connections:
db in to SAD's pin 2
db out to SAD's pin 11 or 12 (watch out MN needs a pull-up resistor to Vcc, you'll want the 20k level trimmer DC decoupled)
db +V to SAD's pin 7
db GND to SAD's pin 1
db clock1 to SAD's pin 8 or 10
db clock2 to SAD's pin 3 or 14

[slash_83]

Tank u Fender !


I ve used this board

http://thmq.mysteria.cz/em3007/PCB_v0_1_layout_1200DPI.png


I think it Will fit with your instruction, right!?

[slash_83]

Uhm i ve 7 connections, not6!


Vcca & vccb...

[Fender3D]

you can connect them both toghether with +V

[slash_83]

Fede ma sei italiano?!

[Govmnt_Lacky]

db out to SAD's pin 11 or 12 (watch out MN needs a pull-up resistor to Vcc, you'll want the 20k level trimmer DC decoupled)

Could you explain this a bit?

Is this incorporated in the retrofit layout that is linked above?

[slash_83]

db out to SAD's pin 11 or 12 (watch out MN needs a pull-up resistor to Vcc, you'll want the 20k level trimmer DC decoupled)

Could you explain this a bit?

Is this incorporated in the retrofit layout that is linked above?

Same question

[slash_83]

Edit

[Thomeeque]

 Given retrofit schema:



Full thread: http://www.diystompboxes.com/smfforum/index.php?topic=78270.0

Federico's note is correct but does not apply here, because there is an output buffer (Q1) yet. On the other hand it requires "pull-down" resistor at the output (e.g. 10k to the ground as in EM, which is this retrofit mainly designed for), completing Q1 output buffer (simple emitter follower). MXR Flanger's 22k trimmer will do too.

However this board IS NOT CORRECT :
R3 value is not 1k but 14k,the resistance in the upper part of the board

It's R2 not R3. Layout should be correct.

T.

[slash_83]

Thank for ur explanation,

So, can i use this board following Federico's reply?!

[Thomeeque]

 To minimise danger of possible confusion let me rephrase Federico's post - for this retrofit (db) it's:

db IN to SAD's pin 2
db OUT to SAD's pin 11 or 12
db VCCa + VCCb to SAD's pin 7
db GND to SAD's pin 1
db CLK+ (or CLK-) to SAD's pin 8 or 10
db CLK- (or CLK+) to SAD's pin 3 or 14

Good luck, T.

PS: Please, if you will finish it, let us know how do you like etc. I'm curious how it will perform in MXR Flanger - thanks!

PS2: 4049N does not mean non-bufferred here (try both variants if you can, but I'd prefer bufferred version) - it's just leftover from some Eagle coding (same applies for 2N3904L btw.).

[Govmnt_Lacky]

I'm gonna be that guy... 

Does anyone have a PDF file for the PCB layout? Something that can be used for toner transfer.

[Thomeeque]

I'm gonna be that guy...  

Cool!

Does anyone have a PDF file for the PCB layout? Something that can be used for toner transfer.

..of my retrofit? PCB_v0_1_1200DPI.png / PCB_v0_1_1200DPI_mirror.png should be printed in proper dimensions if good picture viewer (e.g. IrfanView for Windows) is used for printing - it is set inside the picture that it's resolution is 1200DPI.

For double-checking physical dimensions of the PCB are: 26 x 37 mm; 1.0 x 1.5 inches

Good luck to you too, T.

[Fender3D]

Sorry mates just awake... it's been a looooooooooooooooooooooooong nite tonite...................
BTW ciao slash_83 Biella here...

here's my schematic http://www.diystompboxes.com/smfforum/index.php?topic=79154.msg652910, it's basically the same Tomas' stuff, I didn't use 4049, C3, DC filters, and used a slightly different bias control.
Both will achieve the same goal.

Could you explain this a bit?
Is this incorporated in the retrofit layout that is linked above?

long story short:
the main difference between SAD1024 and MN3007 is the former being a N-channel silicon gate BBD while MN's P-channel
Their output MOSs Drains (?) are connected to Vdd which is positive for SAD and negative for MN.
their Sources (?) must be negative for SAD and positive for MN (pull-down resistor / pull-up resistor).

Tomas' board has R4 as pull-up resistor, then buffered. Q1 will need a pull-down resistor, MXR's trimmer will do just this.

[slash_83]

Ok guys, thank you both for ur explanations.

Im waiting for mn3007, im counting down,db is ready. When i ll do it i ll post my impressions.


Now i ve an eh deluxe electric mistress stock ( i ve only  change ceramic caps with film caps)


I ll do a comparation

[slash_83]

Sorry mates just awake... it's been a looooooooooooooooooooooooong nite tonite...................
BTW ciao slash_83 Biella here...

How many hours of Time zone there Are between Biella and Messina!?!?! ahahah

[Fender3D]

  lol waiting for the Bridge...  

[jdub]

I used Tomas MN3007 daughterboard as is, hooked up just as he mentions above- sounds great     Takes a little fiddling with the timing cap (C21 on the vintage schem), though- I wound up with a nominal 22pF.  Even then it takes some careful trim adjustments to eliminate a "bouncy" sound on the bottom of the sweep- but this might be true of SAD versions as well...

[slash_83]

Today i ve tried to' change all opamp i ve used all tl082 new.

Finally sound from guitar go throught effect and exit to' amp ; probably some bad ic stopped signal before.


I ve not connected mn3007 cause im waiting for yet.

It mounted sad1024.. No effect..sound exit without any modification.


I think that,sad excluded, the rest of circuit is ready to' rock!

Am i right?!

Tl082. X 4. Are good to' make oscillation for the bbd?!

Sorry for my english and for my bad explanation, but i think u could understand what i mean!