I just want to confirm... the board layout in the little rebel site is ready for transfer right?
sorry for the newbie question :-[
Can you provide a link? I don't even know what this little rebel is.
here's a link
http://rebel.massberg.org/schematic.php
the site is in german... they have soundfiles and it sounds okay.
Im just about to try this one....all I need which is not included on the pdf is the pot values.....can anyone suggest some values to try out?
I sent an email to this guy, but the site is from 2004, so I dont know if he will reply!
Cheers
Quote from: obelix on August 28, 2007, 07:58:30 AM
here's a link
http://rebel.massberg.org/schematic.php
the site is in german... they have soundfiles and it sounds okay.
Yup there is a file there that looks perfect for transfer.
Quote from: momo on September 05, 2007, 09:08:18 AM
....all I need which is not included on the pdf is the pot values.....can anyone suggest some values to try out?
You didn't browse the site thoroughly enough. The site has both layout/PCB diagrams and a schematic. The latter shows the potentiometer values.
Here's a link:
http://rebel.massberg.org/source/schematic.pdf
Ya yer right, I just checked the layout!, ill be finishing this as soon as I get the pots. Ive done the pcboard and started filling it up!
This amp will go in this,which I scored last week, ive learned that traynor used some Marsland speakers in some amps, so im exited to try it out with the little rebel.
Cheers
(http://i150.photobucket.com/albums/s114/momoo_bucket/2.jpg)
(http://i150.photobucket.com/albums/s114/momoo_bucket/4.jpg)
that's pretty cool... could it do a clean sound?
Well I did do a Ruby build and that has a warm clean sound....I dont think this one will have as much as a clean sound, but I will use this amp for crunch rythim and heavy distortion. Ill report back once the build is finished.
The fact that it has low, mid, treble controls as it does gain and master volume...will surely give it some versatility.
yup that's also the reason that I plan on doing that amp... aside from the fact that the components are relatively easy to purchase here.
what size diameter is that speaker?
Well, I´ve seen the schematic. It´s a Dist pedal , about 90% of a ShredMaster/Guv´nor, etc., without the contour, straight into 2 LM386. Looks cool though. I think the samples were recorded using some kind of Celestion box, which sure helps anybody. Sorry but I think that the Canadian speaker, with its whizzer cone glued to the voice coil will sound buzzy. Good luck wuth the project.
OK, im almost complete on this build ::).....now Im really frustrated!, if you look at the layout, which was layed out on the wrong side of the board......now the chip pin1 does not seem to match the layout...in other words, I would have to solder the chips on the trace side of the board.
So can anyone confirm this, here is the page with the layout.
I already wrote a long while ago to Massenberg with no reply.
please, please, I dont want to throw it in the bin now that im so close!
cheers
http://rebel.massberg.org/schematic.php
Hmmmmm That looks like a good littleproject. Let us know how you get on. :tu:
Well right now knowinf that its a good project is not want I need!, the pdf seems to print the layout with the x and y axis reversed.....I don't know how I could of reversed it while printing a pdf.
Now ill have to desoder the chip socket holders and resoder on the backside...... >:( >:(
There are four chips in little rebel so I must ask to which one of them are you referring to? I didn't spend much time looking at the layout but I must say that my first impression of it is that it looks fine and standard: The one depicted with components is the top projection and the one shown underneath it depicts the copper side as it should look. It's naturally a mirror image when compared to component side projection. Pinouts seemed to go as they should go but as I said before I just viewed it quickly and therefore can't be sure if it's totally accurate. Could you give a more specific pointer to what you see as an error? I'm not going to start to go through the whole PCB.
OK I got it! all I had to do was to flip the chip legs upsidedown!...Ya its workin alright, its got tons of volume( I used a 250 K pot, did not have a 200K, maybe it would have less volume.
Anyhow, here are some pics of the setup, I originally wanted to incorporate it in the black box you see above, but now, as you see in the pics, this will be a combo talkbox and an option to use the amp and plug an exterior spkr. Its a bit too loud for the Yamaha keyboard 3W spkr so Ill have to be careful with the talkbox. Oh and it drives the above 10 inch speaker hard, ill have to check later for tone with the enclosure.
Ill report back when its all finished.
(http://i150.photobucket.com/albums/s114/momoo_bucket/P1020948.jpg)
(http://i150.photobucket.com/albums/s114/momoo_bucket/P1020947.jpg)
(http://i150.photobucket.com/albums/s114/momoo_bucket/P1020946.jpg)
Glad you got that sorted out. :) I think I'll give this one a try.
What exactly did you mean when you said 'flip the chip legs upsidedown' ?
OK, well here is a service to anyone wanting to do this build......I found out the hard way that the pdf etching image is mirrored, or flipped if you will.What happends with that is when you are populating the board, you have to flip it constantly to match the flipped image.
Now worst that that, once you have the whole thing populated and and soldered the chip sockets in place...only then you realize that the chips are reversed, if you don't want to solder the actual chips on the backside(trace side) of the board not using the sockets on the other side!.....is to flip the chip legs so that the chips are reversed.
Then you will be able to put them in da sockets.
I hope this is clear, the PDF file has the image flipped on the x axis, you need to 'mirror' the image before printing the etching image. That will save you some post populating stress/climax killer!
This file has been available for years now, so either no one built this thing or no one is talkin!
I actually think now that it was done on purpose years ago by the author to force us in buying the actual amp......in those days, DIY was a bit marginal and so I think that it protected his "market"!...then again, why post the shem and layout if you don't want people to use it!
Yeah, now that I'm considering this amp, I was looking over the pdf and noticed the image was reversed left to right. I haven't done any board etching yet, but I have looked into it and the image is usually backwards. I see the image/mask is oriented as a finished board would normally look.
I'm still not sure what you mean when you say flipped. Are you simply turning the chip or are you bending the legs the other way?
This will be my first SS project so I'm wondering what type of components to order. It looks like what I would normally use in a tube amp would be overkill (and expensive :loco ) for such low voltages.
Also, would running this a 12V cause any problems?
Sorry for the long wait ::)
I bended the legs the other way!
It can take 12V and thats what im doing, the components for this are the same as almost all stompboxes, dont have the same voltage ratings as the components used in tube amps.
I will build this one again but with a thicker copper trace, it does have high gain and my board is very thin....