Search found 14 matches

by Antigua
23 Jun 2020, 20:22
Forum: Modern Stompbox Effects (1975 - ...)
Topic: Joyo - JF-13 AC Tone [schematic]
Replies: 66
Views: 79017

Re: Joyo - JF-13 AC Tone [schematic]

Given that the bode plots of the other three are identical without the cab sim, I'd say they must be wrong too, unless the assertion is that the cab is the only thing that sets those amps apart in real life. Most changes are in EQ frequencies, so when set flat there will not be much difference in s...
by Antigua
19 Jun 2020, 22:13
Forum: Modern Stompbox Effects (1975 - ...)
Topic: Joyo - JF-13 AC Tone [schematic]
Replies: 66
Views: 79017

Re: Joyo - JF-13 AC Tone [schematic]

I modded my Cali sound with a bunch of mini dpdt switches to get for pedals in one housing, so basically I hve the american, actone, british & cali in one box under the hood. I considered using panel mount toggle switches but that would require a bunch of drilling, these pcb type dpdt mini switches...
by Antigua
19 Jun 2020, 09:15
Forum: Modern Stompbox Effects (1975 - ...)
Topic: Joyo Vintage Overdrive versus Joyo Signature Overdrive
Replies: 0
Views: 108

Joyo Vintage Overdrive versus Joyo Signature Overdrive

https://i.imgur.com/jFfuuD9.jpg I have more extensive gut shots of these two pedals. If anyone is interested, I'll attach them also. I cracked up a Joyo Signature Overdrive, a modified Tube Screamer, and a Joyo Vintage Overdrive (a more true Tube Screamer clone that doesn't sound quite like a Tube ...
by Antigua
19 Jun 2020, 06:15
Forum: Modern Stompbox Effects (1975 - ...)
Topic: Caline White Heat gut shots
Replies: 0
Views: 100

Caline White Heat gut shots

I saw some speculation that the Caline White Heat was a DOD Overdrive Preamp 250, so I found a schematic and compared it to the circuit board, but it I see no potential for it to be a DOD 250, most especially because there is only one diode on the entire circuit board. All of the schematics I've loo...
by Antigua
18 Jun 2020, 22:32
Forum: Modern Stompbox Effects (1975 - ...)
Topic: Joyo - JF-13 AC Tone [schematic]
Replies: 66
Views: 79017

Re: Joyo - JF-13 AC Tone [schematic]

I modded my Cali sound with a bunch of mini dpdt switches to get for pedals in one housing, so basically I hve the american, actone, british & cali in one box under the hood. I considered using panel mount toggle switches but that would require a bunch of drilling, these pcb type dpdt mini switches...
by Antigua
18 Jun 2020, 22:23
Forum: Modern Stompbox Effects (1975 - ...)
Topic: Joyo - JF-13 AC Tone [schematic]
Replies: 66
Views: 79017

Re: Joyo - JF-13 AC Tone [schematic]

I was just experimenting with treble attenuation with the cab sim bypass mod, and I found that a 3.9nF cap across the volume lugs along with the resistor gives pretty good results. The treble sound like it attenuates around 4kHz, so it's still plenty bright, but it takes away the raspy noise. I've ...
by Antigua
17 Jun 2020, 08:37
Forum: Modern Stompbox Effects (1975 - ...)
Topic: Joyo - JF-13 AC Tone [schematic]
Replies: 66
Views: 79017

Re: Joyo - JF-13 AC Tone [schematic]

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: https://i.imgur.com/DTKjbOq.png So in bypass mode, three of them are essentially the same pedal, and even when t...
by Antigua
17 Jun 2020, 06:54
Forum: Modern Stompbox Effects (1975 - ...)
Topic: Tech21 - Character Series. [schematic]
Replies: 434
Views: 235102

Re: Tech21 - Character Series. [schematic]

I made bode plots of the voice control operation of the the four Joto "sound" models. It appears that the Actone, American and British models are all very similar, the main difference mostly being the particular band stop frequency in the middle. The California Sound's voice knob has a wildly differ...
by Antigua
15 Jun 2020, 08:57
Forum: Pimp-My-Cheap-Pedal
Topic: Joyo Ultimate Octave: how to make it useable?
Replies: 130
Views: 180989

Re: Joyo Ultimate Octave: how to make it useable?

I like the Voodoo Octave pedal so much that I bought a second one, and I modded it also, but this time I made bode plots of the response before and after modding: https://i.imgur.com/UfhiSrM.png This doesn't speak to the differences in clipping, but it shows differences in frequency response. There ...
by Antigua
14 Jun 2020, 04:32
Forum: Modern Stompbox Effects (1975 - ...)
Topic: Joyo - JF-13 AC Tone [schematic]
Replies: 66
Views: 79017

Re: Joyo - JF-13 AC Tone [schematic]

I was just experimenting with treble attenuation with the cab sim bypass mod, and I found that a 3.9nF cap across the volume lugs along with the resistor gives pretty good results. The treble sound like it attenuates around 4kHz, so it's still plenty bright, but it takes away the raspy noise. I've m...
by Antigua
13 Jun 2020, 19:30
Forum: Modern Stompbox Effects (1975 - ...)
Topic: Joyo - JF-13 AC Tone [schematic]
Replies: 66
Views: 79017

Re: Joyo - JF-13 AC Tone [schematic]

Upon further use with the Actone on cab sim bypass, I've found that the treble is hard to tame. With bright single coils, it can be almost impossible to dial out the treble. I created a bode plot of the response of the pedal in order to get a visual of what's happening: https://i.imgur.com/vwKeukv.p...
by Antigua
10 Jun 2020, 06:53
Forum: Modern Stompbox Effects (1975 - ...)
Topic: Joyo - JF-13 AC Tone [schematic]
Replies: 66
Views: 79017

Re: Joyo - JF-13 AC Tone [schematic]

I performed this mod tonight. Killer results. It's a shame they don't come stock this way. Does anyone know if the cab sim bypass procedure is the same for all four of the Joyo - Tech 21 amp sim clones? I notice a lot of people pull these mods off with 24 AWG stranded wire, I've ordered some 30 AWG ...
by Antigua
10 Jun 2020, 06:42
Forum: Modern Stompbox Effects (1975 - ...)
Topic: Joyo - JF-13 AC Tone [schematic]
Replies: 66
Views: 79017

Re: Joyo - JF-13 AC Tone [schematic]

ChristianSosa wrote:
24 Mar 2020, 03:25
Hello Guys!

Does any of you know the value of R24? I kinda lost mine... somehow...
R24 is 33k
by Antigua
08 Jun 2020, 18:39
Forum: Pimp-My-Cheap-Pedal
Topic: Joyo Ultimate Octave: how to make it useable?
Replies: 130
Views: 180989

Re: Joyo Ultimate Octave: how to make it useable?

I just did the cap swap and reverse mod, I think it sounds a little better but I'm honestly not certain I hear a difference. I like that with the gain all the way down, this pedal is almost clean, and that just turning up the gain slightly gives a fizzy clean, and the tone control works awesome, ext...