JOYO JF-13 AC Tone Guitar Effect Pedal DI Amp Sim

Product Information

I did a similar approach, but used a 1M pot in series with the wire from R24 to the “off” side of the SPDT switch. The Joyo AC Tone (JF-13) is a clone of the "Liverpool" from the Tech21 Character Series. The layout of the knobs on the front panel has been altered and the "Character" knob has been relabelled as "Voice" but otherwise everything is the same as for The Liverpool. The AC Tone JF-13 from Joyo is more than just an overdrive pedal. It's more of an amp simulator which is great at producing those distinctive Vox AC30 amp style tones. This means you can even run it straight into a PA system without the need for an amplifier. C21 - .016uf Should be 10nF in a Blonde. This and the one above shift the mid-EQ frequency towards bass, about 550Hz instead of 900Hz E1 is measured as 22n, compared to 18n in the British and 27n in Liverpool. This might be a matter of tolerances, though.

Remove R29, it should be 6.2k in value. That should get the mic sim to be less present when doing the cab sim bypass on the California sound. R28 measured 22k on mine, I wonder if they changed that value lately. C14 is unknown, as i could not measure it accurately. It reads 9.6nF, which is wrong. I assumed 180p as in the Liverpool. No, it's not what you think. I've used a few drops of translucent hot glue to make sure that the wires won't come off, i don't trust such a tiny blob of solder from a mechanical point of view. I did also use that to add some stress relief on the ribbon to the footswitch, it's a breakdown waiting to happen, just waiting for your next gig. If your hand is steady enough and the tip of your soldering iron fine enough to work with SMD, yes it is. I used 26AWG wire for my connections. Start by removing the 0 ohm resistor shown. Solder a wire to each of the three places shown in red. Once your wires are in place put a small blob of hot glue over the connections to the board. I didn't do this to the wire soldered to pin 3 of the level control as it is plenty solid. solder the other end of the three wires to your switch and you are good to go. Works great!Hi, thanks for that. I did it on my American Sound (Harley Benton, not a Joyo, but the pcb is the same). It works great. I forgot to say that each pedal has three curves, corresponding to the Voice/Character control set at 0, 5 and 10. But the amplitude would never reach the theoretical maximum, because of clipping in the following gain stage. The AC Tone is a complete amp/cabinet simulator and ideally should be fed straight into a full-range acoustic amp or PA/mixing-desk. A guitar amp will add further colouration -- so you are right to set the tone of the guitar amp as flat as possible. I've made this mod to all four of the Joyos. The Actone, American and British are all very similar, but the California model has some different circuitry. This is all four in bypass mode:

I found that R31 measured 22k on the actone while the california sound had 68k in that place.but the calif has added mic sim components which lower the overall volume so removing those to match the actone gave me significant increase in volume.

The protection diodes are there, even if the opamp are now TL064 instead of static-sensitive rail-to-rail CMOS devices. The jumpers and open spots are there too. Despite the "True Bypass" label next to the 3PDT footswitch, there is a (presumably JFET source follower) bypass buffer. The SMD SOT-23 chip has "12W" making, it might be a 2N7002 MOSFET. Or something else. This pedal can crate a range of sounds due to the in built EQ which allows you to control the Mid, High and Low ranges. There's also the Level, Voice and Drive controls which can further alter your sound. You can spend absolutely ages playing around with this pedal as you try to find that perfect tone! The thing with the Joyo AC Tone is if you are using it with an amp, set the amp to the sound you like fo what you are wanting to play with the pedal off, then use the pedal to change the tone to another sound. That means that you effectively have two different sounds. For example if I were to use my Vox AC-30 non Top Boost, I'd get the old 1960 sound on that, then add the Joyo to give me the Top Boost 1964 sound at the press of a switch. The other way round if I used by Top Boost amp, I'd set the amp to give the sound of 'Flingel Bunt' and compensate using the Joyo to get the old 'Apache' sound by removing the bass and some treble and adding the mid, wth the 'voice' and 'drive' to taste.