Sunday, 3 February 2013

Roland AF-60 BeeGee

I personally enjoyed the AF-100 BeeBaa design a lot, so once i noticed that this existed - i just had to draw it up. Slave to my own habits, i "modernized" the transistor pinouts to match those everyone have in their drawers. Original has 2SC1000GRs in them, so your usual suspects should work just fine in there - 2N5088, 2N5089, BC549, BC550, MPSA18 and so on. The opamp in the original unit is metal can version of TA7504 - which is very close to LM741, but you should be able to get it right with almost any single opamp.




Posted by at 11:43
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26 comments:

  1. Bohemian H3 February 2013 at 14:02

    I had to post this demo, partly because of the guy demoing it... creepy hilarious:
    http://www.youtube.com/watch?v=62XIG8oAo4Y

    ReplyDelete
  2. onthetundra4 February 2013 at 05:48

    Flip Tone 1 and 3

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  3. Strato Mastro4 February 2013 at 17:21

    so....Verified?

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  4. Travis5 February 2013 at 17:38

    Would the TA7504M be right?

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  5. mirosol12 February 2013 at 17:31

    Built it. Didn't disappoint.

    Not even near of AF-100, but very different from most other vintage fuzzes. Used OP70 for opamp and BC109Cs for transistors. Don't know how to describe it, but i do like this one too. A lot.
    +m

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  6. mirosol12 February 2013 at 17:33

    By the way... This is number 450, so you guys verified 50 of our layouts in 3 weeks and 2 days. Pretty sick!
    +m

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  7. mirosol25 February 2013 at 09:43

    http://mirosol.kapsi.fi/varasto/boxes/BeeGee.jpg

    Added LPB with trimmer as it only got ~6db over unity. This one has the wildest tone control i've come across, ever.
    +m

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  8. Unknown28 February 2013 at 21:50

    Hi Miro, is a LPB the Lardacious Phat Bastard or something else? Cheers mate.

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  9. Unknown11 March 2013 at 06:18

    Still wondering what a LPB is if you could possible help miro. Cheers mate. Just about to start this girl.

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    Replies
    1. mirosol11 March 2013 at 06:30

      Oh. I missed your question the first time altogether.. Sorry about that.
      http://tagboardeffects.blogspot.fi/2013/01/electro-harmonix-lpb1-with-trimmer.html
      +m

      Delete
  10. Unknown11 March 2013 at 10:49

    Thanks for that mate!

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  11. Unknown11 March 2013 at 21:13

    Just a quick one Miro, did you put the LPB before or after the beegee? I'm guessing after but it doesn't hurt to ask. Cheers again mate.

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    Replies
    1. mirosol12 March 2013 at 07:20

      After. But it doesn't necesserily need it. It's loudish without it, but i wanted it to be louder.
      +m

      Delete
  12. Unknown12 March 2013 at 11:38

    Cool, I'll build it and work it from there then. Thanks for the reply mate.

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  13. Gristlepig14 December 2013 at 18:43

    Just built this jammy. Used a 741 for the op amp.
    Pretty cool. Almost Superfuzz-esque, but without the sizzly octavey thing happening.

    I agree it needs a bit more output. Any of y'all know of any circuit tweaks to coax more volume out of it, short of wiring in a booster?

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  14. fuzzhead21 July 2014 at 12:43

    Just built this one, sounds great, dirty with loads of sustain. But the tonecontrol doesn't work at all, where should I start to troubleshoot? ...maybe check the 10nf and 47nf caps? I also used an axial russian pio cap at the right bottom, that shouldn't matter, right? I'm still quite new to this...but boy loads of fun. Great site and people seems to be really cool in here.

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  15. Anonymous15 April 2015 at 17:12

    This comment has been removed by the author.

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  16. Anonymous15 April 2015 at 17:12

    UA741 will work as well?

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  17. Red Staader30 April 2017 at 08:32

    It seems to be missing the 220K resistor connecting from Q1 base to ground ,easy fixed with another column on the left

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  18. Diego3 September 2024 at 02:44

    Hello. I'm new to the world of effect pedals. Could you tell me what the red dots on the board are? Thank you very much!

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    Replies
    1. accro_itou19 October 2024 at 15:49

      Those red dots are cut in the strip. You can use a drill bit to make the hole bigger until you cut the copper strip.

      Delete
    2. accro_itou19 October 2024 at 15:52

      Those red dots are cut in the copper strip. I use a small drill bit to make the hole bigger so it "breaks" the copper strip.

      Delete

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