bluesfendermanblues wrote:
Prior to building 'real' dumbleators, I tried an early version of the Kleinulator with 9 volt. Worked like a charm at bedroomlevels, but not at gigging levels. In all fairness to the Klein design, the latest version (the Ceriatone version), use a Charge Pump design in order to up the voltage.
If 9v voltage is ok, why fix it.
Yeah. I wouldn't attempt to stick this reverb circuit in a passive loop like you'd find in a stock ODS, but it works just fine in an active loop with send level like I have in my amp.
I see in your schematic that you used the medium delay model for both reverbs. I also saw where you said that by using two reverbs, the delay taps are less evident. I have to wonder if the use of two dissimilar reverb modules, say a medium delay and a short delay, would smooth-over the taps even more? I have never used SS reverb modules - they look like an excellent choice for builds where space is limited, such as a head, rather than a combo amp.
Thanks you for sharing your work! Your build is quite inspiring.
Congrats, that is a clean and inspiring build. I'd love to hear it. How is the reverb? I have no experience with the Belton modules mainly because some knowledgable guys here have stated they couldn't get good sounds from them. I second the idea of using different delay time modules. That's how the TC Electronics M-One algorithms work. A combination of small and hall reverbs creates a very smooth and articulate reverb, especially with a 70 to 100ms pre-delay to allow the initial attack to remain unaffected. Does the Belton have predelay?
Yeah. Maybe I should buy a long and short brick to test with. It does sound great the way it is, though. When experimenting I found that having different filter cutoffs helped a lot, so it would make sense that different dwell times would help too. Good ideas!
Oh... I'm pretty sure the bricks do have pre-delay.
bluesfendermanblues wrote:
Prior to building 'real' dumbleators, I tried an early version of the Kleinulator with 9 volt. Worked like a charm at bedroomlevels, but not at gigging levels. In all fairness to the Klein design, the latest version (the Ceriatone version), use a Charge Pump design in order to up the voltage.
If 9v voltage is ok, why fix it.
Yeah. I wouldn't attempt to stick this reverb circuit in a passive loop like you'd find in a stock ODS, but it works just fine in an active loop with send level like I have in my amp.
-Aaron
I am lost on this one, care to explain why you would not use it on a plain ODS w/o D'lator?
M Fowler wrote:There is a newer version of the Belton reverb module and that may be better.
I'm using the newer smaller ones... Unless there's a rev.3 version?
alvarezh wrote:I am lost on this one, care to explain why you would not use it on a plain ODS w/o D'lator?
Thanks in advance
The unbuffered loop is too hot and will likely overdrive the reverb input when you put the amps master high enough for gig levels. The buffered loop (D'Lator) has a send level to trim the volume that hits. Also, in my amp, the voltage divider that would normally be the master volume in a stock ODS is fixed at a specific level, and the post loop return control is the front panel master for adjusting the overal volume of the amp. Thus turning up the master on my amp won't change the level of signal that hits the reverb as it would on a stock ODS.
I'll just insert a fixed voltage divider on the reverb's entrance placed so it's out of the circuit when the reverb is bypassed. That way, when the reverb is off, the signal will not be affected by the divider.
I think I am fully documented now….hopefully NO more questions to you.
aflynt wrote:Here's the schematic for the reverb itself if anybody's interested.
-Aaron
Very nice. Thanks.
Do you know a source for a prefab PCB for the circuit?
I don't think anybody's selling prefabbed versions of this exact circuit with the two parallel modules (unless somebody happened to have the same idea as me), but there are a few people over at MadBean's board selling prefabbed versions of single board implementations. BOYC also has their own version too.
I'm not really planning on doing a big batch of boards and selling them, but If you're interested I can send you the Eagle .brd file for the schematic above. Then you could simply create an account at OSHPark upload the file and they'll send you a set of 3 boards in week or two. It's about $25.40 for a set of 3 from them. The latest board revision is unverified, though. The board I used for the amp actually has a few mistakes in it and cut / jumpered traces on the back. The new one fixes those, but I haven't had a chance to buy a lot and test it yet.
-Aaron
Thanks for your kind offer, I would be happy to receive a copy of the .erd file. Thanking you in advance.
Here's a couple demos. They were recorded with my iPhone and are very compressed and I'm really just noodling around and butchering Hendrix and Beatles tunes, but I think you can kind of get a feel for the reverb sound. I'll do proper demos once the amp is burned in and tuned.
It has a really cool semi-modulated shimmer to it when the reverb is cranked. I'm not sure if it comes through in the demo or not. It doesn't get super splashy like springs. I was playing lighter in the second video.
