Build Your Own Clone Message Board

It is currently Thu Mar 28, 2024 2:25 am

All times are UTC - 6 hours




Post new topic Reply to topic  [ 8 posts ] 
Author Message
 Post subject: Spring Reverb Dry Blend
PostPosted: Thu Apr 04, 2019 10:52 am 
Offline

Joined: Thu Apr 04, 2019 10:35 am
Posts: 4
Hi. Is there a diagram around that shows how to incorporate a dry blend board into the latest spring reverb circuit?
Thanks, Jeff


Top
 Profile  
 
PostPosted: Thu Apr 04, 2019 11:57 am 
Offline
Site Admin
User avatar

Joined: Sun Jan 22, 2006 1:39 pm
Posts: 5983
Location: Richland, WA
Image

There isn't a diagram. You could use the dry blend add on board, but the reverb already has the infrastructure for a dry blend. It would be much easier and cheaper to just add the one pot and two resistors (and change the value of two of the existing resistors).

1. Remove the "reverb" pot.
2. Pull the "input" end of C9 and stick it in the lug 3 eyelet of the reverb pot.
3. remove R10 and R11.
4. Connect two 10k resistors in series to make a 20k resistor. Do this twice.
5. put the 20k series resistors in the R10 and R11 spaces.
6. Connect lug 1 of a B10k pot to the middle of the R10 series resistor
7. connect lug 3 of the same b10k resistor to the middle of the R11 series resistor
8. Connect lug 2 to 1/2v.

_________________
*patience is a virtue*

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


Top
 Profile  
 
PostPosted: Thu Apr 04, 2019 2:14 pm 
Offline

Joined: Thu Apr 04, 2019 10:35 am
Posts: 4
Thanks a lot!
I am assuming lugs 1 and 2 of the reverb pot go back where they were?
Super sweet pedal!


Top
 Profile  
 
PostPosted: Thu Apr 04, 2019 5:28 pm 
Offline
Site Admin
User avatar

Joined: Sun Jan 22, 2006 1:39 pm
Posts: 5983
Location: Richland, WA
jeffc wrote:
Thanks a lot!
I am assuming lugs 1 and 2 of the reverb pot go back where they were?
Super sweet pedal!


No! The reverb pot is gone. The Lug 3 on the PCB is 1/2v, so you can connect lug 2 of the new B10k to there, but aside from that, just consider it completely gone.

_________________
*patience is a virtue*

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


Top
 Profile  
 
PostPosted: Fri Apr 05, 2019 10:17 am 
Offline

Joined: Thu Apr 04, 2019 10:35 am
Posts: 4
Got it. In your opinion is it redundant to try to keep the reverb pot and still add a dry blend? I was hoping to be able to mix in dry after tweeking the REV + DWELL. This is why I was wondering if the D/B board was the way to go. I might be over thinking this...


Top
 Profile  
 
PostPosted: Fri Apr 05, 2019 10:54 am 
Offline
Site Admin
User avatar

Joined: Sun Jan 22, 2006 1:39 pm
Posts: 5983
Location: Richland, WA
jeffc wrote:
Got it. In your opinion is it redundant to try to keep the reverb pot and still add a dry blend? I was hoping to be able to mix in dry after tweeking the REV + DWELL. This is why I was wondering if the D/B board was the way to go. I might be over thinking this...


Yes, it would be redundant. As is, it is essentially a blend pot, but can only go 50/50 in favor of wet at max. If you turn down the reverb knob, it's still a "wet/dry blend", it's just increasing the dry ratio. So having an actual wet/dry blend knob would be exactly the same as what you have now, if you never turn it up past noon. By having both a reverb level and wet/dry blend, you're just having a second knob to reduce the wet ratio. The only time you would want a separate "wet" volume level is if you had a separate dry volume level, i.e., two separate knobs, not a single wet/dry blend. Which would be another option for you - you could also just add a dry volume level and achieve the same goal.

The add on board is really meant for effects that have no dry signal already in the mix, e.g., distortions, fuzzes, overdrives, etc. Reverb, chorus, flange, delay, phase, etc., all intrinsically have a dry blend, whether you have control over it or not, so it's much easier to just add a passive crossfader to the existing circuit than to use the add on board.

_________________
*patience is a virtue*

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


Top
 Profile  
 
PostPosted: Fri Apr 12, 2019 10:37 am 
Offline

Joined: Thu Apr 04, 2019 10:35 am
Posts: 4
Thank you for your time/input on this. For me, it really is about preserving my dry tone at all costs. I've been playing around with this pedal and thinking about it... This thing is so sweet and clean that I think I'll leave it as stock (other than, I did do the mod to increase low end - C2 to .1uF) Happy to have such a nice little spring emulator. - J


Top
 Profile  
 
PostPosted: Fri Apr 12, 2019 12:55 pm 
Offline
Site Admin
User avatar

Joined: Sun Jan 22, 2006 1:39 pm
Posts: 5983
Location: Richland, WA
C2 would be adding more lows to the wet signal.

I like that this circuit uses a non-inverting buffer to split the wet and dry. The wet goes through an inverting amplifier. Then the two are mixed back together in a differential amplifier with the wet going to the inverting input and the dry going to the non-inverting input, so the wet is corrected and the dry is never altered at any point. Most modulation effects muck with the dry signal and then try to correct it at the output buffer, and more often than not, the phase is never corrected. I don't know why more designs didn't use this type of wet/dry mix.

_________________
*patience is a virtue*

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


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 8 posts ] 

All times are UTC - 6 hours


Who is online

Users browsing this forum: No registered users and 4 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:  
cron
Powered by phpBB® Forum Software © phpBB Group