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Re: Bixonic - Expandora [traced]
Posted: 09 Feb 2010, 20:32
by choudy
Thanks for reply.
I've already found an error. One of LM308 was halfway broken. At least i've designed new pcb layout and found complete schematics (thanks archive.org)
Re: Bixonic - Expandora
Posted: 10 Feb 2010, 14:59
by Renegadrian
So summing it up, has anyone successfully built an Expandora (ver.1)?!
Are those schems/layouts verified?!
Re: Bixonic - Expandora
Posted: 16 Feb 2010, 22:58
by choudy
Yeah, I've finally build Bixonic Expandora. Posted schematic is verified and better than one from RG Keen site. I have to do some final cleanup in layout, so please be patient.
Re: Bixonic - Expandora
Posted: 17 Feb 2010, 00:58
by Renegadrian
WOW
I could need to build one for a friend in the next weeks - keep us posted of new layouts!
Thank you!
Re: Bixonic - Expandora
Posted: 16 Apr 2010, 08:36
by Zztop128
Great pedal, I've got the original and it does sound great.
For wich reason is the RN2206 used?
And isn't R11(1M) too big?
Re: Bixonic - Expandora
Posted: 09 Jun 2010, 16:28
by Zztop128
I've just build this pedal.
I used an LDR and an LED instead of using the Sharp opto unit. That was not a very good idea, so I ordered a H11F2 optocoupler. I also discovered that the 2N3703 isn't doing anythng. I assume that it should amplify the signal it gets from IC3?
Re: Bixonic - Expandora
Posted: 12 Jun 2010, 16:08
by caspercody
Does anyone know the difference from the original to the EXP-2001? The 2001 has a drive pot on it.
Re: Bixonic - Expandora
Posted: 12 Jun 2010, 16:32
by cbriere
caspercody wrote:Does anyone know the difference from the original to the EXP-2001? The 2001 has a drive pot on it.
I have a EXp-2001, and i open it up to see what is inside.
The IC is not a 308, it 's a tlo72
i can put pics here if needed.
I should also receive the schamtics soon.
Re: Bixonic - Expandora
Posted: 13 Jun 2010, 00:46
by caspercody
Thanks! Would love to see pictures, and the schematic.
Re: Bixonic - Expandora
Posted: 22 Nov 2010, 00:28
by caspercody
Any news on the 2001 schematic, or pictures?
Thanks
Rob
Re: Bixonic - Expandora
Posted: 22 Nov 2010, 00:46
by cbriere
caspercody wrote:Any news on the 2001 schematic, or pictures?
Thanks
Rob
it is here
viewtopic.php?f=1&t=9834&p=106768&hilit=bixonic#p106768
Re: Bixonic - Expandora
Posted: 22 Nov 2010, 01:15
by caspercody
Thanks! Has anyone made it, to verify it is correct?
Re: Bixonic - Expandora
Posted: 13 Apr 2011, 01:40
by Barry
cbriere wrote:caspercody wrote:Does anyone know the difference from the original to the EXP-2001? The 2001 has a drive pot on it.
I have a EXp-2001, and i open it up to see what is inside.
The IC is not a 308, it 's a tlo72
i can put pics here if needed.
I should also receive the schamtics soon.
Wouldn't that be a TL071?
Re: Bixonic - Expandora
Posted: 09 Jul 2011, 16:48
by azrael
Does anyone have the transfer to choudy's layout?
Re: Bixonic - Expandora
Posted: 10 Jul 2011, 09:53
by choudy
Here it is.
Re: Bixonic - Expandora
Posted: 16 Sep 2011, 07:16
by quickapple
Hi
What is the CI noted in Figure 5, I want to try this pattern.
Thanks
Re: Bixonic - Expandora
Posted: 18 Sep 2011, 02:37
by mich
4u7
Re: Bixonic - Expandora
Posted: 18 Sep 2011, 08:42
by quickapple
Thanks
But my poor english would say: IC noted 5 in the schematic
Sorry
Re: Bixonic - Expandora
Posted: 12 Feb 2012, 21:10
by Joe L
Renegadrian wrote:So summing it up, has anyone successfully built an Expandora (ver.1)?!
Are those schems/layouts verified?!
Almost finished with mine. I found a direct cross reference to the Toshiba RN2206 transistor used to sink the current through the opto. The NTE2370 even has the correct internal bias resistors and specs so it should work perfectly. I found Newark and Moyer Electronics stock the part but am still looking to see if Mouser has a direct cross reference in a different brand.
..Joe L