Sunday 14 February 2010

Lovepedal COT50

28 comments:

  1. Hey IvIark

    is this verified?

    Thanks
    EVAD

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  2. Yes, this one has been built by several people now

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  3. COOL

    Thanks for all the sweet layouts

    tagboard RULES!!!

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  4. Hello Ivlark what would be the difference between the two almost identical COT50's (not the Briggs mod)

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  5. The two layouts on here are essentially the same, just that one is a tagboard layout, the other is vero. The only difference is that the vero layout has an additional cap for power supply filtering which I omitted from the tag layout to save space. It shouldn't make any audible difference though unless you have a dubious supply that causes noise. The vero also has a switch to take the diodes out of circuit, but most people will want them in anyway so it's not a necessary mod.

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  6. That's a great drive. Just built it.

    http://farm9.staticflickr.com/8351/8276 … 4a8de0.jpg
    http://farm9.staticflickr.com/8480/8274 … e256d3.jpg
    http://farm9.staticflickr.com/8363/8276 … 877506.jpg
    Sounds (Tele neck pickup, Two Rock Exo through Two Rock Standard cab):
    http://soundcloud.com/synchu/502-mojo-build-demo

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    Replies
    1. The pic links seem to have truncated and don't work. Sounds great though

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  7. Weird. Trying once again
    http://farm9.staticflickr.com/8351/8276051262_b8984a8de0.jpg

    http://farm9.staticflickr.com/8480/8274972045_d62ee256d3.jpg

    http://farm9.staticflickr.com/8363/8276038520_a757877506.jpg

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  8. Many thanks for the great layout (and all the others). Fabulous! :) Now I still have 11 pos length of tagboard :) So should decide what to make next.

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  9. Hi, I just built one cot50 but all I hear is like an motorcycle engine when on, when off just the guitar bypassed, the 330r resistor is a 330 ohm resistor same thing on the 47r is it a 47 ohm? please let me know, thanks!

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  10. a motorcycle, sorry, I used the same on the layout

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  11. Hi, I just confuse what is 1K Lin Bias Pots mean? Is it just normal 1K linear pots?

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    Replies
    1. Yes, bias just refers to what the potentiometer actually does.
      Cheers
      Dave

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  12. Hi - the input cap is shopwing here as 4n7, yet on the modded Church... it states a change from 47n to 56n... for added thickness. I'm assuming that the 4n7 here should be 47n... as 4n7 would be quite bright?

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  13. Would it cause issues if i used a 100k pot instead of 1k?

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    Replies
    1. You would have more than 99% of useless sweep on the turn.
      +m

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  14. Scratching my head on this one ... thought it would be open and shut. I've built two, and neither one is working. When the effect is on I can hear the 'crackle' when I adjust the bias, but output is nil to *very* low. I've tried two different offboard wiring styles and flipping / different transistors. Anyone else ever encounter something similar?

    FYI: I am using a 2n5088 tranny and 1n4148 diodes.

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    1. Post the transistor pin voltages and a front and back pic of the board.

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    2. This comment has been removed by the author.

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    3. The pin voltages are:

      C: 2.37
      B: 2.36
      E: 1.73

      I got a base power rating at 9.42v. I didn't include a pic of bottom of board, everything is on top.

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  15. Decided to try a different Electra layout and realized that I was using a 2.2k resistor instead of a 2.2m the whole time. Nothing to see here folks ... move along ... sounds great.

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    Replies
    1. Doh! We've all done that before. Glad it's working.

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  16. Hi! Ive just built this and it does absolutely NOTHING... No footswitch instaled, turning the pot does nothing, the signal is not degraded. The resistors are as on the scheme. Im no newbie its a real mystery whats going on. Whsts even more confusing, whenbi plug the power suply out the signal is still there but distorted and fart-like. Any ideas? :)

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    Replies
    1. Measure the voltages of the transistor. That gives the best clue to what is going wrong with it

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  17. E-1,90
    B-2,40
    C-9,66

    Output 9.6 DC 200mA

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  18. Would there be a difference in sound if it were fed at 18V?

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  19. Sorry to comment on something so old but I've been trying to figure out if the mark axial aluminum cap refers to the indent on the positive end or if it refers to the negative side. Thanks!

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