Sunday, 1 January 2017

Electro Harmonix Frequency Analyzer

Here are two layouts for a classic Ring Modulator.
The first one is for a vintage version (schematic available here).
The DIP version of 1496 had a different pinout.
The second one is for the modern vesion and it could potentially fit in a 125B size box (there is no schematic but a PCB layout here).
Not sure if they have been verified.
You should be able to use Mark's Bipolar Voltage Converter.



23 comments:

  1. Happy new year! Sweet! I was just looking for a ring mod to build.

    ReplyDelete
  2. This comment has been removed by the author.

    ReplyDelete
  3. Happy new year! What a great addition -- ring mods are one of my favourite effects. Tis one's a bit of a scary size for me just now (and thanks to this site I have a huge build list already) but I'll definitely be tackling it at some point in 2017.

    ReplyDelete
  4. Hi
    Is anybody ging to Build this one? I started a board Of the modern version But i cant find a 10uf ceramic cap. If i Use a electrolyt what Would be the right Direction?

    ReplyDelete
    Replies
    1. That's a bipolar electrolytic cap.
      If you use a polarized cap I think the + side should connect to Blend 1.

      Delete
  5. What type of i.c. is the 8038? I can't find anything with that code number at my suppliers.

    ReplyDelete
    Replies
    1. Its an ICL8038. Should find on Evilbay for a couple of quid/dollars.

      Delete
    2. I recently bought 2 on eBay for like 3 euros with Free shipping from ebay. On eBay you'll find a lot of cheapo function generator kits with this chip.

      Delete
    3. Anyone have a good source for an ad63? It seems like they are discontinued and cost around 7 or 8 euros

      Delete
  6. Call it verified! Built the modern version. Sounds very similar to the YT vid i'm surprised to say. Getting some lovely sounds out of this. Great job Alex as always.

    Brent, i think i got my AD633's from Banzai, but i don't remember paying what there charging now.

    ReplyDelete
    Replies
    1. I should have added that the Blend pot is working backwards so 3 and 1 should be swapped.

      Delete
    2. Thanks Gavin!
      I've swapped the Blend's lugs.

      Delete
    3. How are you powering it? Did you use the bipolar charge pump?

      Delete
  7. Yes, i'm using Mark's Bipolar Voltage Converter.

    ReplyDelete
    Replies
    1. Great! One more question, is your AD633 labeled with ANZ or JNZ? Seems there are a few versions out there, and not all are quite the same.

      Delete
    2. Read the data sheep closer. ANZ and JNZ have same pinout. But there are also JRZ and ARZ, that have a different pinout. Not sure which one this layout is for.

      datasheet: http://www.mouser.com/ds/2/609/AD633-877235.pdf

      Delete
    3. Keep on reading it closer.
      Note that the ones with different pinouts are in SOIC (SMD) package and PDIP (through hole). So the SMD chip is not pin-to-pin compatible with this layout.
      +m

      Delete
    4. Ah, I see that now. My bad. Thanks.

      Delete