Hey guys, I have an idea for a VP Jr mod to do, which is basically just implementing a buffer splitter inside the pedal to eliminate the tone suck (very similar to what JHS does, I honestly thought of this before I knew they did it). The issue is that I'm not sure how to take my buffer schematic which is super simple and make it a buffered splitter. Anyone know how to do that/ have any experience modding the VP Jr? Thanks a ton, I can post my schematic if need be.
This is one of those I've been meaning to do. Looks like it'd be pretty easy fit just replacing the PCB and drilling a couple holes.
Check out the AMZ buffer-splitter, its the perfect circuit for this purposes.
Quote from: dbp512 on April 08, 2016, 01:14:36 AM
Check out the AMZ buffer-splitter, its the perfect circuit for this purposes.
I looked it up, this is just about perfect. Considering I'll only need two outputs it will be a super small board.
Quote from: jubal81 on April 07, 2016, 11:40:41 PM
This is one of those I've been meaning to do. Looks like it'd be pretty easy fit just replacing the PCB and drilling a couple holes.
Where would you implement the volume pot into the new PCB? I'd assume after the input, before the output.
Quote from: Tuxedo3 on April 08, 2016, 06:36:14 AM
Quote from: dbp512 on April 08, 2016, 01:14:36 AM
Check out the AMZ buffer-splitter, its the perfect circuit for this purposes.
I looked it up, this is just about perfect. Considering I'll only need two outputs it will be a super small board.
Quote from: jubal81 on April 07, 2016, 11:40:41 PM
This is one of those I've been meaning to do. Looks like it'd be pretty easy fit just replacing the PCB and drilling a couple holes.
Where would you implement the volume pot into the new PCB? I'd assume after the input, before the output.
Nope, you'd want the pot after the signal is buffered. The connection to the guitar signal should be very high impedance.
Quote from: jubal81 on April 08, 2016, 07:46:00 AM
Nope, you'd want the pot after the signal is buffered. The connection to the guitar signal should be very high impedance.
Oh, that makes so much more sense. So send the buffered signal to the pot.
Quote from: jubal81 on April 08, 2016, 07:46:00 AM
Nope, you'd want the pot after the signal is buffered. The connection to the guitar signal should be very high impedance.
Also, how do you think you'd fit in the new board? I've designed one but it doesn't have a place to be mounted like the current one is. Any thoughts on that?
Quote from: Tuxedo3 on April 08, 2016, 07:29:46 PM
Quote from: jubal81 on April 08, 2016, 07:46:00 AM
Nope, you'd want the pot after the signal is buffered. The connection to the guitar signal should be very high impedance.
Also, how do you think you'd fit in the new board? I've designed one but it doesn't have a place to be mounted like the current one is. Any thoughts on that?
That's where I've left off. I was going to measure the enclosed jacks and make an eagle part for them to mount the new one exactly like the one that's in there. Like a drop-in replacement. I've breadboarded up a nice JFET boost for it and thought I'd use a second JFET for the tuner buffer.
Quote from: jubal81 on April 09, 2016, 12:12:19 AM
That's where I've left off. I was going to measure the enclosed jacks and make an eagle part for them to mount the new one exactly like the one that's in there. Like a drop-in replacement. I've breadboarded up a nice JFET boost for it and thought I'd use a second JFET for the tuner buffer.
That's a sweet idea. I wasn't initially thinking about an exact drop in board but that'd be cool and way cleaner. I've been using Diptrace for PCBs and I'm not sure if i'm familiar with adding the holes for that type of on board 1/4 connector. Either way I think it'd be cool to do a board that just goes in place of the current one and utilizes the pot wires just like the EB one does.