MXR carbon copy question

[xmugmugmugx]

Is it possible to build an mxr carbon copy?  Has anyone tried this?

[jkokura]

Why not just build a PT-80 or a Rebote? They use digital chips rather than the analog BBD's, but I like em. The rebote is a little clean if you want that analog sound, but the PT-80 may be what you're looking for.

Is there something special about the Carbon Copy? I know that the Carbon Copy is all analog, or purported to be, a half decent price, and is pretty popular. To build an all analog Delay can be challenging because getting a good price on BBD chips is hard. Have you looked at the Analog Delay from BYOC?

As for the schem for the Carbon Copy - with Google, anything is possible.

Jacob

[joegagan]

does anyone else find this topic funny?

put a carbon copy in a xerox, out pops a carbon copy of a carbon copy.

[petemoore]

  If I had to have that, I'd buy.
  If I didn't need an echo any time soon, I'd consider the challenge of making a ''cricketing'' echo unit:
  1        1        1     1    1   1  1 1111.
  The bold 1 being the source note, the following 1's being the repeats insertion timings. Hit a note and it goes out.. 'boomerangs' back at ya..''strobe light doppler effect ?''.
  I have a funky old beat/ kinda works analog echo that does this function, pretty neat one, HF clicks sound neat through it.
  I fell to temptation of well featured echo controls of digital units, I haven't noticed any pain yet, Dchips seem perfectly happy reproducing time delays, echoes allow for them time to mull things over.
 

[joegagan]

many of you have heard me sing the praises of the digitech digidelay, esp the backwards scrambler function. overall clear and functional sounding unit.

tap tempo, up to 4 seconds of delay, rugged const, 7 modes including echoplex simulator.

they routinely sell for 36 to 55 dollars on ebay, i would not want to take the time to build a delay when i can do this., with a volume pedal on the 100% wet send ( going to a dedicated amp or amp channel), it is a wonderful tool.

for an extra 50 or so, thrown in a used EH nano echo or whatever they are, you have two delays on your board for a hundred bucks.

[joegagan]

xmugmugmugx, sorry, i derialed the conversation. i didn't address your question. i am sure the carbon copy is a great unit, i think jeorge tripps designed it?

[wavley]

many of you have heard me sing the praises of the digitech digidelay, esp the backwards scrambler function. overall clear and functional sounding unit.

tap tempo, up to 4 seconds of delay, rugged const, 7 modes including echoplex simulator.

they routinely sell for 36 to 55 dollars on ebay, i would not want to take the time to build a delay when i can do this., with a volume pedal on the 100% wet send ( going to a dedicated amp or amp channel), it is a wonderful tool.

for an extra 50 or so, thrown in a used EH nano echo or whatever they are, you have two delays on your board for a hundred bucks.

I know it's off topic but I absolutely love the digidelay, I wish I hadn't sold mine, but I've always been a fan of digitech delays since I got my RDS twenty or so years ago...

[kungpow79]

does anyone else find this topic funny?
Not really 
put a carbon copy in a xerox, out pops a carbon copy of a carbon copy.
That will happen, indeed 

I've not seen a schematic or layout for the CC.  Someone would have to come up with a PCB layout for that because delays tend to be the more complicated circuits.  Never seen one on perf or vero.  I put together a PT-80 and its pretty darn good, perhaps a bit basic in terms of features, but thats fine for me.  Go to GGG for a nice pt-80 kit or buy their PCB, or check out Tonepad for a Rebote PCB.

[xmugmugmugx]

I love the xerox idea.    But thanks for the help everybody.  I like the fact that the carbon copy is in such a small box.  That is really the only reason.  I have a friend who builds the pt 80's from ggg, i like the sound the board is just bigger than i'd like. 

[tiges_ tendres]

I love the xerox idea.    But thanks for the help everybody.  I like the fact that the carbon copy is in such a small box.  That is really the only reason.  I have a friend who builds the pt 80's from ggg, i like the sound the board is just bigger than i'd like. 

The carbon copy is part through hole and part smd.  If you did it all through hole, the board would be larger and wouldnt fit in such a small space.

[jkokura]

I'm fairly certain you can get a rebote into a 1590B (MXR sixed box). Not as sure but I bet a good thinker could get the PT-80 into one as well. Unless you buy a Carbon Copy, or another analog delay that uses the SMD parts, it's unlikely you'll be able to build one for as cheap as far as I know. I saw a Buy it Now for a CC on ebay a couple months ago for 75 bucks. With BBD chips, enclosure and finishing - I doubt I could do it that cheap.

That said, I know it's not about the money here. I build cause I love it, and if you came up with a plan and accomplished an Analog delay to compete with a CC - I'd wanna build it too, even if it ended up costing me more.

One last note - I know it's the usual ethical debate, but I know that when a pedal is in current production it gets a little dicey about posting schems and layouts and such. Be careful and search hard and just show us pics when it's done would be my recommendation if you want to pursue it.

Jacob

[xmugmugmugx]

Yeah i haven't planned on building it yet, if i did i'd cut the modulation feature out, i just really like the way it sounds.  I would love to see how to build a delay without any ic's.  I know it would be a large build bt does anybody know how to make an old school bbd?