Analog Delay schem...

[zarathustra]

Check out the KIS analog delay in the schematics/layouts area. Tone Czar design. Uses 3X3208. Advertised as 640ms delay.

This sounds interesting, but I can't seem to find anything in the gallery. Do you have a link?

[oldschoolanalog]

http://www.diystompboxes.com/smfforum/index.php?topic=18388.0//

[jaman]

Is there a layout for this ?

Also, does anyone has the schematic for the Maxon AD-900 ?

thank you

[PedroTejada]

Hi Guys!
Anyone have listen samples of the Kiss Analog Delay???
I Really like the DM2...but they are very expensive....and my abilities on the Eagle not are sufficient to make a PCB....if anyone have on....please send to me of possible!!!
I search on the web the Maxon Ad900 Scheme but i haven't found it....i found some intern photos:
http://www.geocities.jp/hirock2001/diy2/effect-delay01.html

This site ( my IE don't visualized the text because is on a different language) have some photos in Hight Definition of The Front of The DM2 and of the AD900...

Sorry About the bad English, Pedro Tejada

[jaman]

I built the AD-3208 analog delay...I like the sound, but it's too short for me...only 200ms...

If I put MN3205 will it be 400ms ?

Is there any other schem for 600ms ?

Has anyone the AD-900 maxon schem ?

thank you !

[Serge]

Oli,  did you also use the exact transistors as specified in the schem?  I have a hard time finding them.  If you have some good alternatives, please let me know.

[jaman]

Oli,  did you also use the exact transistors as specified in the schem?  I have a hard time finding them.  If you have some good alternatives, please let me know.

I can't understand exactly which transistor do you mean...

I used the followings :

transistors :
3x 2n5088
2n5485 (fet)

Chips :
SA571N
2x BL3208B
MN3102
TL072

[Serge]

I was actually referring to the transistors in the DM2 that Oli built, not to your AD3208.  The DM2 schematic specifies the following transistors and diodes:

Q1-4: 2SC732TM-GR
Q5: 2SK30ATM-Y
Q6-7: 2SC945-P

D1,2,5: 1S2473
D3: RD5.6EB3
D4: RD11EB3

I have some troubles in finding these (my local electronics store thinks I'm crazy).  Any recommendations for good replacements are welcome I'd say...

[george]

build an AD-3208.  It uses regular ole' components like 4558 op amps and 2N5088 and 2N5089s.  Anything you find that matches the pinouts and hFEs of these trannies should be fine. 

I had a DM-2 then built the AD-3208 then sold the DM-2 because it sounded EXACTLY the same.

Just get smallbear to mail the BL3208s  and the NE571 to you, order an RTS PCB from www.generalguitargadgets.com and you'll be in business

[oli]

Hi,

I think any standard npn transistor will work (2N3904, BC546, 2N5088, 2SC1815). I left the flip flop and used true bypass, but I think any n-FET will work (2SK117, 2SK184, BF245)
D1,2,5 use 1N4148
The RDs are zener, so use a zener diode with 5,6V and 11V.

I don´t think, that the DM-2 and the AD-3208 sound the same! Boss used one IC (3205) and Scott Swartz used two (3205). I like the Boss better. But if you want a good DIY delay build the one with the PT2399!
Regards,
Oli

[col]

There is a schematic and PCB foil diagram in the book "Advanced projects for the Electric Guitar" by J Chatwin published by Babani. There is also the info on converting it to a chorus/flanger. It is based on a MN3102 and a MN3207 but from the description it'll only give 50ms. I have the parts but have not yet built one. There is also a digital delay in this book but I've not been able to trace some of the chips on the internet

[Serge]

Oli, can you explain me how you remove the flip flop out of the circuit?  I wanted to make it true bypass as well, but did not now how to get started.  Do I just remove everything as from R29?  Do I keep C24?

[george]

Hi,

I think any standard npn transistor will work (2N3904, BC546, 2N5088, 2SC1815). I left the flip flop and used true bypass, but I think any n-FET will work (2SK117, 2SK184, BF245)
D1,2,5 use 1N4148
The RDs are zener, so use a zener diode with 5,6V and 11V.

I don´t think, that the DM-2 and the AD-3208 sound the same! Boss used one IC (3205) and Scott Swartz used two (3205). I like the Boss better. But if you want a good DIY delay build the one with the PT2399!
Regards,
Oli

good call with the parts on the DM-2!

I'm puzzled by what you say about the AD-3208 not sounding the same - after all an AD-9 probably doesn't sound the same either.   Do you think the AD-3208 sounds worse?!? And why?  Just curious???

[seedseed]

Which pedal gives the longer delay times the 3208 or the pt80?

[MetalGuy]

I suppose you *could* stick 3205 chips in there if you could find them, but 3205 chips are very hard to find in small quantities. 
BL3208, on the other hand, seem to be fairly available at reasonable prices for little guys like us.

I have two V3205s in my GGG delay and they work fine without any problems. They are available from Smallbear for $4.95 the piece.

I really like the DM2 an The DM3 but in Brazil they are very expensive. Oli, you have a PCB, Layout for The DM2??? You can send me it?!?
And the final result is close to the original!??!
Thank You, and sorry about the bad English, Pedro Tejada

There is a thread with DM-2 and DM-3 PCB layouts:

http://www.diystompboxes.com/smfforum/index.php?topic=63923.0

I built the AD-3208 analog delay...I like the sound, but it's too short for me...only 200ms...

If I put MN3205 will it be 400ms ?

Is there any other schem for 600ms ?

Yes it will. From GGG site:

It was designed it to accept two of the currently manufactured BL3208 chips, which give a 4096 step delay line, the same length as the DM-3 and CD-10, for a maximum delay time of about 205 milliseconds at a clock speed of 10 kHz. It can also accept two MN3205s for a 8192 step delay line, which doubles the delay time to 410 milliseconds.

[Valentinych]

 http://www.diystompboxes.com/smfforum/index.php?topic=82708.0