Wednesday, 22 December 2021

God City Instruments HM-1

One more layout before x-mas...

Here is a modified Boss DS-1 into a taeaked HM-2 EQ. Should sound pretty wild, eh?

Schematic is avaiable HERE.

 


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8 comments:

  1. Dude Incredible24 December 2021 at 06:55

    Is there a gci onslaught layout out? I suspect it could be a tubescreamer based circuit. But who knows.

    ReplyDelete
  2. SteveE13 January 2022 at 18:47

    Just finished building this one. Can hear it working but the volume is very low. Going to start looking for a solder bridge but I don't think it's that.

    ReplyDelete
  3. SteveE13 January 2022 at 19:27

    I think the issue is near the output as my volume pot is doing nothing. The other pots seem to control the volume.

    ReplyDelete
  4. SteveE13 January 2022 at 19:45

    Think I found it. The schematic shows the 3.3k resistor out of IC2 going to Pin 3 of IC3. The layout appears to be linking the resistor to Pin 5 of IC3.

    ReplyDelete
    Replies
    1. fuzzhead13 January 2022 at 21:11

      Hi there.
      I don't think the 3,3k resistor are the culprit since each op amp channel is interchangeable i.e. they are totally separated from each other so the pin numbers necessarily don't have to match up with the schematic. However, I found two things that could be the culprit...

      Move Level it to J-29

      Add a cut at O-16.

      See the updated layout.

      Delete
    2. SteveE15 January 2022 at 17:50

      Thanks Fuzzhead. I will try that.

      Delete
    3. SteveE15 January 2022 at 18:00

      That worked. You can tag it.
      It sounds awful but I think that's the desired effect.

      Delete
    4. fuzzhead16 January 2022 at 06:57

      Awesome!
      Tagged.

      Delete

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