Sunday, 25 August 2024

1776 Multiplex Delay Modulation Add-on

 A little useful modulation daughterboard for your delay circuits. Created by the one and only Chris Stelloh.

I originally made this for Ben Spinks, who verified it. It's the modulation daughterboard for the 1776 Effects Multiplex delay and it works pretty well with just about any PT2399 delay circuit. I've listed my preferred values as well as the originals from the build document. You can add a toggle between the mod depth and the delay pot to turn it off and on, but if you simply max the speed/rate knob, the modulation is no longer audible and the rate LED is static.


 

15 comments:

  1. This comment has been removed by the author.

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    1. Thanks Chris. Very useful it is too. I've used it for both analog and PT2399 delays so far. Nice in this Montavillian:

      https://www.instagram.com/p/C8t0KuYsDE9/?utm_source=ig_web_copy_link&igsh=MzRlODBiNWFlZA==

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  2. Hi, where is says DEPTH 1+2 to Delay 3, I’m a bit confused. There is no Delay 3 on the 1776 Multiplex layout?! Please can you confirm how this joins to the main board? Many thanks

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  3. Chris drew this board up for Sebastian's simplified version of the deluxe version of the 1776 Multiplex. If you're building the Multiplex Jr, it doesn't need this board. It has the same modulation effect included in that layout.

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    1. Oh, I built the stripped down version. Does this not go with that board then? Sorry, I’ve must have confused myself.

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    2. Any advice would be greatly appreciated. From what you say, I’ve built the right board so I’m still very confused. Haha

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  4. Delay 3 is the 3rd lug of the Delay potentiometer?

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    1. There are two delay pots though…

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    2. If memory serves me, it connects to delay 2.

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    3. Thank for this. I got it sorted in the end with the help of someone from Reddit. It can connect to either or both using a switch. Thanks for your help!

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    4. Glad you got that figured out. Connecting this circuit to the third leg of any delay time/length potentiometer will modulate that delay signal. However, you may have to test the value of R2 in order to get it sounding right to your tastes.

      Apologies if I don't respond to comments on posts I have drawn. I don't know about comments unless I see them in the comments feed on the main page, and these days, a lot of comments are getting buried by stuff posted by bots... see the "dead internet theory"... yay. -Chris

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    5. Funnily enough, I didn’t see your reply! No problem about not getting to my comment, it was directed into the ether with the hope somebody might hear! Haha. Thanks for these layouts, many hours spent taking away stress thanks to you!
      I try to avoid any internet communication for the “dead internet” thing. It is indeed a scary time.

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  5. Yes, they’re getting out of hand these days!😡

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    1. I meant R7, not R2 - and since people are using AI algorithms to escalate their spamming, I have a feeling that as long as this site gets regular traffic, the comments are going to more of those robo-posts with links to buy crap. I think that is why sites like FSB and DIYSB are requiring either 1) verified accounts to post or comment, and 2) using screening services like Cloudflare before you can view anything.

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    2. Yea, I thought cloudflare was annoying at first, but I totally get it. I’m a moderator at a guitar forum & I get spammers trying to join or solicit every other day, it’s tiring!

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