Tonepad 301 Flanger

Rotting · October 14, 2003, 01:01:38 AM

So, has there been any updates on this project? Is it a known working project? I had seen some posts about it not working with most people. Are there any known issues/fixes? Just checking...thanks!

Bill Bergman · October 14, 2003, 09:29:14 AM

Mine works Great!!!! Very quiet, very smooth. If you under power it with 9v you can get a cool rubbery reverb sound.

Jose · October 14, 2003, 09:35:35 AM

Gotta get new opamps for mine, so its shelved for now 'till I get tl062's. Jose

Aharon · October 14, 2003, 05:48:01 PM

Mine didn't work but somebody said that the transistor that was a dual in the original has to be matched when you use two,is there any truth to that?.
Aharon

Bill Bergman · October 14, 2003, 06:24:10 PM

I think I bought matched NTE's if I remember correctly

dj_death · October 17, 2003, 12:10:20 PM

Looking at the schematic of the flanger the Q106 is stated as a 2SA1015 at the comments on the right of the page which is a PNP. But Q106 is drawed as NPN and at francisco's Layout all transistors are 2n5088(NPN). I think that Francisco was confused by the schematic. Looking at the biasing of Q106 the emitter is at Vcc, which means that the BE junction
of the tranistor conducts only if it is a PNP.If we use a NPN the Bc junction will conduct and BE junction will be off which is out of specification for bjts.I think that a 2n5087 should be used for Q106.I hope this is the solution to the problem, because i'm in search for a working flanger project. I still don't know if Ultra Flanger works!

Aharon · October 17, 2003, 01:35:51 PM

Thanks Dj for that insight into the transistors,maybe that's the missing link.
The UltraFlanger works but has a massive tick at the output and I have not heard of anybody that has gottenn rid of it,the only one that claims he built a silent one is John Hollis himself.
Aharon

Bill Bergman · October 17, 2003, 01:43:43 PM

Sorry Aharon,
my post was probably incorrect or misleading about the match transistors. That what you get when I try to remember what I did a while back. Hope you get yours working. It's a great pedal.

dj_death · October 17, 2003, 03:10:01 PM

I hope this helps guys, because i really want to build this flanger!!!

Aharon · October 17, 2003, 03:32:27 PM

Quote from: Bill BergmanSorry Aharon,
my post was probably incorrect or misleading about the match transistors. That what you get when I try to remember what I did a while back. Hope you get yours working. It's a great pedal.

No worries Bill,I don't remember myself what I did on a specific pedal,now I'm more prone to taking notes.
I hope I get it working too,although I think I have to rebuild the whole thing,traces lifted after trroubleshooting for so long.
Aharon

dj_death · October 18, 2003, 02:22:13 PM

What about Q106 it is a NPN or a PNP the schematic is really confusing. The 2SA1015 that the schematic states for Q106 is a PNP ,Fransisco what do you think?Bill what transistor you used for Q106, because i might be wrong.

Fp-www.Tonepad.com · October 18, 2003, 03:51:17 PM

Quote from: dj_deathWhat about Q106 it is a NPN or a PNP the schematic is really confusing. The 2SA1015 that the schematic states for Q106 is a PNP ,Fransisco what do you think?Bill what transistor you used for Q106, because i might be wrong.

I have been digging thru the email Bill sent me when he was building the prototype (back in August 2002!, no wonder we don't remember!). And at one point I asked him about the transistors he used, his reply was "some 2N3904's and a 2N3906". So there's the answer, Q106 is PNP.

Oh, and no matching needed for any of the transistors is mentioned anywhere (which was at one point believed to have been the cause of the effect not working)

The new revision of the PDF with that correction is now available at tonepad, go ahead and download it.

Fp

dj_death · October 18, 2003, 04:12:40 PM

Thank you for responding Fransisco. I hope that's the solution and Aharon gets his flanger working.

dj_death · October 20, 2003, 11:50:09 AM

Also the Boss Flanger "http://www.geocities.com/j4_student/Bf2.gif" is a circuit very very simillar to Ibanez Flanger and uses the cheaper MN3207 , MN3102.

Fp-www.Tonepad.com · October 20, 2003, 01:10:28 PM

I think the Ibanez FL9 also uses the MN3207/MN3102...

Both are good starting points for those wanting to use those IC's instead.

Fp

Fp-www.Tonepad.com · October 22, 2003, 03:48:26 PM

Any updates on this?

I'm about to finish populating mine and I may be able to fire it up tonight...

Fp

Bill Bergman · October 22, 2003, 04:07:13 PM

Good luck FP. Hope it sounds as good as mine. Thanks for the project!

Fp-www.Tonepad.com · October 22, 2003, 04:08:45 PM

Hi Bill!

I sure hope it sounds as good as yours! From what I hear you're selling your ADA flanger... Is this the FL301 the only flanger you're keeping?

Fp

Bill Bergman · October 22, 2003, 04:22:03 PM

Nope, I have a bunch of different flangers thanks to the DIY community.

Joep · October 22, 2003, 06:17:50 PM

Mine is also almost finished. I have to put on only some cap's and the pot's and connectors. Unfortunatelly I very busy at work and away the coming weekend so I think I'm not be able to finish it after the weekend.

I looking forward to your result Fransisco, let us know!

Bye,

Joep

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Tonepad 301 Flanger

Rotting