Build Your Own Clone Message Board

It is currently Thu Aug 11, 2022 7:42 am

All times are UTC - 6 hours




Post new topic Reply to topic  [ 9 posts ] 
Author Message
PostPosted: Fri Oct 29, 2021 1:14 am 
Offline

Joined: Sun May 03, 2020 6:07 pm
Posts: 101
Location: Melbourne, Australia
I recently received my Analog Vibrato kit, and I'm planning on making both the Chorus and Tape Warble mods shown in Keith's updated schematic, but obviously I'm a bit slow, as I've been struggling to figure out how to wire the DPDT switch to achieve the intended result (the connection to Pin 6 being made in both On positions, while the connection to Pin 7 is made in only one On position).

I've come up with this, which seems to work, but is there a better way? Or have I got it totally wrong?

Attachment:
DPDT-wiring.png
DPDT-wiring.png [ 23.74 KiB | Viewed 3395 times ]


The red lines indicate jumpers between the pins on the switch; the blue lines indicate the internal connections on the switch in the two On positions. The three diagrams, left to right, show the switch positions: Off, On (1), and On (2).


Top
 Profile  
 
PostPosted: Fri Oct 29, 2021 11:27 am 
Offline
Site Admin
User avatar

Joined: Sun Jan 22, 2006 1:39 pm
Posts: 5639
Location: Moses Lake, WA
There's more than one way to skin a cat. The way you have it drawn is not how it is in the schematic, however it will still work. "OFF" removes the .22uF caps from the circuit for "fast". "ON1" only has one .22uF in the circuit for "warble". And "ON2" has both for "slow".

_________________
*patience is a virtue*

Please do not PM me. email is prefered. keith@buildyourownclone.com


Top
 Profile  
 
PostPosted: Fri Oct 29, 2021 12:47 pm 
Offline

Joined: Tue Jan 19, 2021 7:08 pm
Posts: 327
Location: Clovis, CA
Here is the mod Keith drew out when I did the chorus mod. You can read about it here (viewtopic.php?f=8&t=59510)


Attachments:
VB2mods.jpg
VB2mods.jpg [ 402.82 KiB | Viewed 3380 times ]

_________________
One of the great advantages of childhood is that nightmares usually come only when you are sleeping.
Top
 Profile  
 
PostPosted: Sat Nov 06, 2021 8:03 pm 
Offline

Joined: Sun May 03, 2020 6:07 pm
Posts: 101
Location: Melbourne, Australia
I don't think that I was very clear with my question, so I'll try to summarise was I think is required just for the tape warble mod, based on Keith's green annotations on the schematic:

  1. Replace C19 and C20 (47nF) with 22nF capacitors;
  2. Add a DPDT switch and two 0.22µF capacitors, wired something like this:

Attachment:
AnalogVibratoMod.png
AnalogVibratoMod.png [ 23.78 KiB | Viewed 3262 times ]


where the connections are:

  1. "input" (pin 2 of the DPDT) is connected to the junction of C19, C20, R28, and R35;
  2. "To Pin 6" (pin 5 of the DPDT) is connected, through a 0.22µF capacitor, to the junction of C19, R30, and pin 6 of the opamp; and
  3. "To Pin 7" (pin 6 of the DPDT) is connected, through a 0.22µF capacitor, to the junction of C20, R31, R33, and pin 7 of the opamp.

Have I got that right? (Note that I slightly adjusted the DPDT --> "To Pin 6" connection from my earlier post.)


Top
 Profile  
 
PostPosted: Sun Nov 07, 2021 1:29 pm 
Offline
Moderator
User avatar

Joined: Tue Jan 02, 2007 1:24 pm
Posts: 15547
Location: Albany, NY
Since I have never done this mod, I would wait for Keith's endorsement, but that looks right to me.

_________________
“My favorite programming language is SOLDER” - Bob Pease (RIP)

My Website * My Musical Gear * My DIY Pedals: Pg.1 - Pg.2


Top
 Profile  
 
PostPosted: Mon Nov 08, 2021 12:47 pm 
Offline
Site Admin
User avatar

Joined: Sun Jan 22, 2006 1:39 pm
Posts: 5639
Location: Moses Lake, WA
Yes, that is all correct. Again, your diagram still doesn't match my schematic. In my schematic, I have the two poles connected, and the two "pin 6 throws connected". But the way you've draw your diagram will still work exactly the same. The desired changes to the C19 and C20 capacitances are still the same.

_________________
*patience is a virtue*

Please do not PM me. email is prefered. keith@buildyourownclone.com


Top
 Profile  
 
PostPosted: Mon Nov 08, 2021 5:22 pm 
Offline

Joined: Sun May 03, 2020 6:07 pm
Posts: 101
Location: Melbourne, Australia
Thanks Keith and Bob, much appreciated :)


Top
 Profile  
 
PostPosted: Mon May 16, 2022 7:09 pm 
Offline

Joined: Sun May 03, 2020 6:07 pm
Posts: 101
Location: Melbourne, Australia
I finally got time to build this kit with both the Vibrato/Chorus toggle and the Slow/Fast/Tape Warble mod -- it sounds fantastic :)

I'll post pictures once I get around to painting the enclosure (I have quite the backlog :oops: )


Top
 Profile  
 
PostPosted: Fri Jun 03, 2022 6:14 pm 
Offline

Joined: Mon May 30, 2022 4:34 pm
Posts: 10
eponymous wrote:
I finally got time to build this kit with both the Vibrato/Chorus toggle and the Slow/Fast/Tape Warble mod -- it sounds fantastic :)

I'll post pictures once I get around to painting the enclosure (I have quite the backlog :oops: )


I'd be curious for an audio sample!


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 9 posts ] 

All times are UTC - 6 hours


Who is online

Users browsing this forum: No registered users and 3 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
Powered by phpBB® Forum Software © phpBB Group