Sunday, 22 January 2023

Castledine Electronics Magical Mystery Box

 Schematic is avaiable HERE.

There is two layouts for this one. One for an audio transformer and one for a fasel inductor.

Transformer layout

 
 
Fasel inductor layout.

 



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15 comments:

  1. Brazdj23 January 2023 at 21:50

    So cool! I am interested in a Fasel version or even a version where the transformer is mounted offboard (like dual lock the top of the transformer to a side wall). Just so it is even easier to fit into a BB with top mounted jacks

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  2. Brazdj25 January 2023 at 15:14

    Thank you so much! I didn't realize the inductor footprint would be similar to the transformer. I think I will take your excellent layout and try to take more items offboard, like duallocking the transformer or inductor to a side wall and maybe soldering the voice capacitors directly to the rotary switch with a small daughterboard to 5x1 daughterboard to connect to Treble 2.

    I am sure Mr Castledine has tons of germanium transistors that are out of spec hence their use as diodes here. So I plan to simply use some germanium diodes. Seems like an easy replacement. Correct?

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  3. Ian5 February 2023 at 00:39

    You can tag the transformer version Anders, real nice overdrive

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    Replies
    1. Ian5 February 2023 at 01:46

      Used OC42's, hfe around 60 for both. Gets nice a fuzzy with the distortion up. MRB is very subtle but treble and bass knobs are very useful.

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    2. Tom5 February 2023 at 02:47

      Do you have any snaps of your finished pedals? I'd be curious to see what your finished product looks like. I'm going to build the Supa-J when I have time. I trust your taste. As a life-long Beatle fan I'd be interested in this circuit too.

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    3. Tom5 February 2023 at 02:48

      Oh yeah, I built The Wizard last week. It's dope.

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    4. Ian5 February 2023 at 12:35

      I made The Wizard also, its way better than the Catalinbread Sabbra Cadabra in my opinion. Great distortion!!!

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    5. fuzzhead5 February 2023 at 17:29

      Thanks. Tagged.

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  4. Ian13 March 2023 at 00:38

    Hi Anders, you can tag the Fasel version also. The MRB setting is much better with the inductor. Built it with a tremolo and reverb in the same enclosure.

    https://www.dropbox.com/s/q3r8k21ds2oleo4/Conqueror.jpg?dl=0

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    Replies
    1. Tom13 March 2023 at 02:35

      That's really cool Ian. I looks like it runs on plutonium.

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    2. Ian13 March 2023 at 09:45

      Lol!! 1.21 gigawatts

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  5. Ben Spinks30 May 2024 at 21:18

    I've built this and the White pedal, both very cool, but i've got a spare inductor I don't know what to do with. Are there any other layouts worth looking at that use a 500mh fasel inductor?

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    Replies
    1. Ian31 May 2024 at 00:07

      You could try the GTC Bloody Finger, you can use a transformer or an inductor.

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    2. Ben Spinks31 May 2024 at 00:59

      Thanks Ian. I’ll give that one a go 👍.
      Cheers
      Ben

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