Saturday, 9 September 2017

Caline CP16 Mark 4

Apparently mimicing Mesa MKIV head's distortion. Hadn't seen this type of distortion control in a pedal before, so i thought this might be a nice addition. Has nice amount of gain and there's room for tweaking.
Update 12.9.2017 - Don't know what was going on in my head with the original layout revision. It had tons of profound errors in it. Now fixed per schematic and let's try this verification thing again...



35 comments:

  1. If I can get the honey do list done in time this week end Im going to try to build this. Great lay out. Thanks Mirosol!

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  2. I had one of these. A very rich smooth distortion, but not enough treble.

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  3. I just Built it and it works very well ! As Dylan said, not enough treble. Thanks for this nice layout as usual.

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    1. Cheers. I'll tag it right away.

      For the treble, lower the value of 6n8 or take it out completely. That should affect highs enough.
      +m

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    2. At the time these seems to sell for 25 €/$/£ shipping included. So i might just buy one and swap the cap + mod the visual aspect :)
      +m

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  4. got it done as well.. sounds great to my ears.

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  5. On a side note, there is a typo on the layout, right diode should be D5.
    Thanks Miro I'll give it a try very soon

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  6. There is no D5 on schematics, only two D4's

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    1. From the comments "D5 is 1N5817", it's the polarity protection diode on the right ;-)

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  7. I was wondering if there was a link to a schematic?

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    1. This comment has been removed by the author.

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  8. I found the schematic but there seems to be some omitted parts. The reason I ask Is I get a cool distortion but the gain 1 is not having any big effect on the signal. And it is not as intense as most of the videos and the output needs to be at about 3/4 for unity. The descriptions say Gain 1 is treble and gain 2 is bass. The parts I am curious about are: C2, C6, C10 are 220n, R1, 3, 6 are 1k, R5 R12 100k. But maybe you made some changes for personal preference as you are quite the wizard. Thanks man, have a great day!

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    1. Now that i look at the layout i'm like whaaat. Yes. Sataurday was quite strong hangover day for me. There are obivious errors at the moment and i'll fix the layout later tonigh once i'm back at the couch...

      Sorry for the inconvenience.
      +m

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    2. Good to hear, I built it yesterday evening and was not very happy with it ;-)

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    3. From what I see :
      - 100µf filtering cap is missing (I had motorboating on mine)
      - C2 & R3 from pin 2 to Vref are missing
      - C8 is misplaced : positive leg to Vref and negative to 1k from pin 6

      Socketing the 6n8 cap is indeed interesting, or even adding a bright switch with f.e. 1n

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    4. Lots of wrong in there :) Fix is coming in next 24 hours...
      +m

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    5. I made the changes on my board, what a difference !
      Great thick and tight distortion, a ton of gain, but noisy as hell ! It might get a little better when boxed but will probably remain very noisy (but that could be my build).
      With gain 1 fully opened, I reduced gain 2 until the noise disappeared. Still a great amount of distortion, sounds just a little clearer, mess messy which isn't bad.
      This is tipically the type of pedal on which the gain stays cranked, so I consider replacing gain 1 with a fixed 250k resistor, gain 2 with a fixed 80k resistor (value for which the noise disappears) and only keep 2 controls : level and a bright switch which I may put on a rotary swith with 3 ot 4 positions.
      With my amp, 3n3 sounds very well balanced instead of 6n8

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    6. so what controls did you leave? level and gain 2? plus a switch?

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    7. No I only intend to keep level and an Eq switch. Gain will always be set the highest possible without noise, in my build that's gain 1 250k and gain 2 80k fixed resistors

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    8. Redrew the whole thing and removed the verified tag for now...
      +m

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    9. Thanks Miro
      BTW I realize I built mine with B250k pots instead of 50k...dunno why...
      I'll change them and see if it tames the noise

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    10. :) That's five times the gain from each gain stage, so some of the hiss may be coming from those..
      +m

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    11. Right !
      I changed the pots, indeed no more annoying noise but distortion looses some of its spirit compared to what I had, less humpfff :-)
      I think i'll keep my idea of Gain1 fixed 250k and gain 2 fixed 80k and just play with level and tone caps

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  9. Tag it. A little hissy but for high gain acceptable. Thanks so much for all the help!! DVFX
    Ps I added a on off on with a 3.3n middle, 3.3n and a 1n and sounds killer. May up both caps. It is a bit bright with the Lower caps but would be useful with a dark amp. Have a great day!

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  10. holy hell Im getting my ears checked. Sounds so much better than before. Ty for the update!

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  11. Could you help me? Where is the output?

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    1. It says pretty clean on the layout notes: Volume 2 to output.

      This means that you take the output wire from volume pot's middle lug to you bypass switching scheme.
      +m

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  12. Has anybody added a tone control or a clipping diode switch? This seems to be a great but simple circuit, but it could need a bit more flexibility...

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  13. Just built the revised version. Really liking this, thanks miro!

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  14. hi folks! need a little help. built this one today and gain1 isn't doing nothing. my first thought was a bad 50k pot but after replace it the issue is the same. tried various fixed resistors and nothing. any ideas?

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  15. sorry for the dumb question, but what are the blue "cuts"?

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