This might not be critical, but I have seen a big difference in other applications, so I plan to try it. TODO: 100nF ceramic bypass capacitors between the power rails on all opamps. TODO: Eliminate the boost circuit and repurpose the switch to control the clipping diodes. A good pedal in the front or in the FX loop makes more sense. I will try some stuff, but I am not 100% sold on this. TODO: Add some soft clipping diodes to get some mild clipping when digging in. TODO: Experiment with R27 and R28 to see how lower or higher rails on the preamp could make the amp's volume range more usable. I will revert it in a few days to check again. The truth is that I did not hear any noticeable difference. I have not used a cap this way before so I was not sure about the effect. I was wondering how starved the chipamp could be without some solid power capacitance close to it. I will probably restore this since I do not need any more gain on the clean channel and I am not sure I like the change in tone. And it seems to also affect the voicing a bit since it includes C8 and R9 in the feedback loop (probably to compensate for adding R5 on the first stage). It gives another boost in gain on the cleans that is immediately audible as extra noise. I have tried this but I am not sold on it. The top right is not connected to anything, and the bottom left is no longer used since we removed the LEDs. The panel now looks much better The switch fits only if it's mounted on its side so that it flips horizontally. Replace the plastic boost switch with a DPDT toggle switch. Perhaps it makes sense to experiment with different values and types here to suit your taste, but without it, you get a nice percussive and super-rich sound that is almost JazzChorus-like. Something especially evident in harmonics and pick attack. Without it, when the boost is on, the sound gets a bit harsh. It rounds the sound a lot, and it kills lots of clarity. This cap acts as a low-pass filter on the final stage. This is super easy and very straightforward. Add a 1/4 jack to allow connection to a CAB. When you engage the boost, the amp still goes loud fast, but you get some more volume resolution than before. The difference is more evident without the boost on. Change the linear volume pot P4 to one with an audio taper. This brings me to my second recommended mod. The only issue with it is that when the boost is on and the gain is set high, the amp is VERY loud. Just snip the LEDs and you immediately get rid of that "bees in a can" sound when the boost is on. This is the first mod that anyone should do. Ssguitar and tdpri forums have much useful info. So here is the list of my TODO stuff, gathering info from around the internet, plus results so far. I do not expect it to clip or sound like a tube amp on its own, but it can sure sound awesome with pedals. My goal is to have a nice super-clean platform to use with my pedals. Vox Pathfinder 10 schematic (rev.D 4-28-2021) - Album on Imgur The schematic has been around for almost a decade, but there still might be things that need to be fixed. Plus it's a DIYer's dream, being a full old-school circuit with a transformer PSU and all through-hole parts. With a few mods and a cab it sounds very nice. The Pathfinder 10 also features controls for gain, treble, bass, and volume, plus a clean/overdrive switch.That's my second ongoing small guitar amp project after the Fender Champion 40. Want to practice late at night without disturbing your neighbors? No problem! Just plug your headphones into the headphone/line-out jack and away you go - your sleeping neighbors won't hear a thing because using this jack automatically mutes the amp's speaker! This jack also doubles as a specially filtered line-out, which is perfect for recording your amp without having to worry about setting up any pesky microphones. With a mere press of this switch you can go from a crystal clear clean sound to Vox's uniquely warm distortion or you can go from a slightly crunchy bluesy tone to a high-gain, modern-rock roar. The clean/overdrive switch allows you to change instantly between clean and dirty sounds. The Pathfinder 10's powerful yet always tone-filled 10-watt output makes this amp perfect for home practice, backstage warm-up, and recording. This 10-watt, 1 x 6.5" combo's eye-catching looks are also classic Vox and include basket-weave, leather-look vinyl, distinctive diamond grille cloth and, of course, chicken head knobs! Small but all-important details such as gold beading and white piping have also been faithfully reproduced, perfectly recapturing the legendary look of Vox. Those instantly recognizable, warm British sounds you've come to expect from Vox are alive and well in the compact, 10-watt Vox Pathfinder 10 combo - plus a high gain capability that's thoroughly modern!Ĭlassic Vox Sound and Style in a Compact Package
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