I finally got around to building this. It's a dual Hermida / GGG Reverb in a 1790ns with AMZ switching. I tried to get it to look like my '68 Showman since I'll be using it to provide reverb on both channels of that amp. It is designed to sit on top of it (hence the jack locations). It took a long time to assemble wire up. Like 7 hours or so. I think I may be doing it wrong. :) It worked first shot, though, and sounds great.
(http://www.aaronflynt.com/wp-content/uploads/2012/04/dual_reverb_external-1024x764.jpg)
(http://www.aaronflynt.com/wp-content/uploads/2012/04/dual_reverb_internal-1-1024x764.jpg)
(http://www.aaronflynt.com/wp-content/uploads/2012/04/dual_reverb_iternal-2-1024x764.jpg)
-Aaron
fantastic, great results!
Heck of of build! Wonderful.
Josh
Wow that turned out great! I have been following your reverb builds and this turned out superb!
Hey silverface !
Great build,
Congrats.
Mich P.
Class act! Great work , thats fantastic
That's a great looking build. I particularly like the graphics paired with those knobs.
Wow. Most excellent and tidy inside and out. Congrats!
Gadzooks! That's inspiring. It's been really cool to follow how you designed the boards and got to this bad boy. You even went all out with relay switching. Congrats, bud. This is a masterpiece!
That's pretty awesome. :)
Thanks! Unfortunately, I can't really take too much credit for the graphics since I basically just copied the aesthetics of the Fender faceplate.
I tried it on a job this morning and it worked well, but since we played in a Gymnasium it was a bit difficult to really hear it. After messing around with it later this afternoon, I discovered that jumpering the two reverbs together in series and running them both at once sounds really really lush. It's funny because one side sounds slightly different than the other (I'm guessing that would be the tolerance of the carbon films coming into play) when played separately but together they kind of meld into one and add density to the effect. The only down side is that it gets a bit noisy when running both. I'm wondering if using metal film resistors would help that. Now I'm contemplating a version that uses two with a dual ganged mix pot and a "density" switch that toggles between one and two.
-Aaron
A few better pictures:
(http://www.aaronflynt.com/wp-content/uploads/2012/04/dual_reverb_external_2-1024x768.jpg)
(http://www.aaronflynt.com/wp-content/uploads/2012/04/dual_reverb_internal_2-1024x768.jpg)
-Aaron
That is seriously awesome.
Really nice PCB design as well.
That's some great work inside there! Great job!
When running these in series the noise is most likely from the "bricks" Just like running two pt2399's in series. They add noise that needs more filtering.
Josh
Quote from: gtr2 on April 19, 2012, 02:59:26 PM
When running these in series the noise is most likely from the "bricks" Just like running two pt2399's in series. They add noise that needs more filtering.
Josh
I was starting to wonder about that. Are they actually PT2399's inside? Based on the 3 I've built, I've noticed that these bricks seem to vary in sound from one to the next. That or the part tolerances of my caps and resistors are playing a bigger role than I thought. Some have slightly longer decay and some sound less brash when you turn the mix up and play something percussive. They also get seem a bit warm after being powered on a while.
-Aaron
I think I read that the Belton bricks are essentially three PT2399s in series.
Jacob
Really? Thats kind of funny, especially considering the package size.
Really cool PCB design, do you happen to sell those?
Quote from: neiloler on April 19, 2012, 04:29:09 PM
Really? Thats kind of funny, especially considering the package size.
Really cool PCB design, do you happen to sell those?
Thanks! I don't sell them, but I'd be willing the share the .brd file with anyone that wants to send it off to Dorkbot.
-Aaron
pt2399's sound a little different too
Here's the patent for the belton brick
http://music-electronics-forum.com/attachments/12200d1293998429-pt2399-reverb-patent.pdf
Josh
I'd hate to suggest a green-wire fix for such a beauty of a build, but perhaps a little more filtering on the power supply rails might help with the noise. you can check if it's your power supply by running the effect off a battery temporarily. Alternatively (and this is totally just speculation), there are a lot of digital chips running on one power supply and digital chips can junk up ground with noise that can carry through the analog circuits. It's a very common design practice to keep analog and digital grounds separate and only connect them at one point.
In any case, gorgeous build, the double reverb mode sounds interesting.
Your build looks amazing. It's really neat inside.
I replaced the carbon films with metal and it really didn't make much of a difference in hiss. I didn't try the additional filtering yet, though. I did do a clip with the two sides running in parallel into my '68 Showman, though. :) The noise really isn't that bad all things considered. It's barely noticeable in a quiet room.
[soundcloud]http://soundcloud.com/aflynt/dual-reverb-pedal-on-7-into[/soundcloud]
Please excuse the sleepy playing. I literally got out of bed and recorded this.
The signal chain is as follows:
Strat on Neck Pickup -> Gizmo (TS9/Son of Screamer Variant) -> Visual Volume pedal splitting signal:
A ->Dual Reverb Side 1 with Mix on 7 -> '68 Showman Normal Channel
B -> Dual Reverb Side 2 with Mix on 7 -> '68 Showman Vibrato Channel
-> Forte 3D 1x12" speaker cab with Jensen C12K
In parallel the reverb is much more dense and you don't hear the individual delay taps as much.
-Aaron
I'm usually not a big 'verb fan, but that is one heavenly tone you got there, man! And playing when you just woke up apparently does wonders for your phrasing, sounds real good!!
Paul
Quote from: DutchMF on May 08, 2012, 03:52:00 PM
I'm usually not a big 'verb fan, but that is one heavenly tone you got there, man! And playing when you just woke up apparently does wonders for your phrasing, sounds real good!!
Paul
Thanks! I'm really stoked about the sound too. I think running both preamps on the Showman opens the amp up quite a bit too. Usually I run an A/B rig between the channels one set up clean and one dirty, but Saturday night I got lazy and just brought my small board without the A/B switch. The only cable I had with me long enough to get from the board to the amp was my double one so I figured I'd just try it out with the channels jumpered. Anyway... to make a long story short, the rig sang and sustained like crazy set up like that.
-Aaron
You did such a fabulous job on this! Its impressively clean on the inside and the outside. Im sure it sound like gold..
Just saw the demo a few post up..oh boy that sound great!
Quote from: bigmufffuzzwizz on July 02, 2012, 04:22:27 PM
You did such a fabulous job on this! Its impressively clean on the inside and the outside. Im sure it sound like gold..
Just saw the demo a few post up..oh boy that sound great!
Thanks!
-Aaron
awesome project. can you PM schematic /layout for me
Beautiful Built in and out and sounds fantastic.
Is there any particular reason why you went with that brick package?
i just really want build it, but i can't find this schematic.. what this is a secret??