2 different units here. the first one had a blown CA3280 and a substitute ECG VR. The second unit is very distorted. looks like the VR was replaced with an unidentifible device. Schematic and layout to follow.
I'm half tempted to get a Liverpool just to see what's inside, but if someone has already had a look, I'd be interested to hear it.
Supposedly, some guy on YouTube bypassed the speaker sim so he could use it with his amp - that's what I'm looking for.
I just got this unit in as the owner needed to know if it could run on a 'normal' voltage instead of the 15V 400mA centre positive power adapter.
The unit has a single 12AX7 tube
'The Eden Glowplug Bass Tube Warmer Pedal makes achieving an authentic tube tone a breeze. Leveraging tone circuitry designed particularly to improve and complement your bass sound, the Glowplug gives depth and warmth to your sound, unleashing the natural harmonics of your strings. From mild tone warming...
Hello FreeStompers. I recently unearthed a file folder of Clockworks documentation and am pleased to be able to publish the info here for your entertainment. From the file notes it looks like I had the original concept idea in 1977, but didn't get around to actually building anything until late 1980. My first attempt apparently involved non-retriggerable one-shots but that was less than satisfactory and was abandoned in favor of the analog frequency divider approach that ultimately went into...
I continue to trace my Exar pedals - today, it's Exar KM-03 Kamikaze. That particular model seems to be quite popular in Poland back in time because I've seen some good mentions about it. I had two units; both had the same components inside, so I traced the one in a slightly worse condition. For another one, I have a box and user manual.
I was lucky to get Exar OD-1 in good condition for a reasonable price, so I thought I must trace it. Many legends are around that pedal, and pricing on the used market went too far, significantly after JHS added it as one of the modes in Bonsai pedal. I hope my trace will help reduce insane prices on those, sometimes higher than vintage TS ones.
Does anyone know what exactly this does? He doesnt offer it anymore, so I assume it's fair game. I have one lying around that I want to do something with
I traced this one a few months ago and never got around to putting the schematic up here. The only thing that bothers me is how the 9v supply is hooked up to the cathode of the bypass LED. I still have the box but the owner is not willing to desolder the caps to find the values. Any way to measure them in circuit to get a rough idea of what the are? In my experience NP0/C0G caps are usually lighter in color....like a grey and the X7R caps are a darker brown so that's how I marked them on the...
Here is the first draft of the schematic. This is the Japanese version that comes with the orange battery cover. My son in law has the version made in Sri Lanka but, this Japanese one sounds better. I prefer this pedal on my guitars with humbuckers. It does for hummers what a Tube Screamer does for single coils.
I finally caved and bought a MojoMojo to trace (also to test out, but mostly to trace). I knew it was the same overall design & PCB as the Dark Matter which I traced about a year ago so I figured I might as well give it a go to see what the differences are.
I also wanted to test a claim TC Electronic made. They say ...the fact that we use a special circuit that ramps up the voltage to more than 3 - 4 times the amount of your typical drive pedals , it turns out this is a lie. The whole circuit...
Hi, sorry if someone has posted this already, if they have then I am asking again. Do the markings on newer smd boss pedals allign with the older schematics? I don't have any as of now, but if I get (for example) a newer metal zone will c35 on that be the same as c35 on a through hole metal zone?
Godbless
It is not a stompbox (or an effect?) but I hope you will find it interesting.
I started to draw the schematics but it is too complex for my old brain.
u5_front.jpg
u5_back.jpg
u5_back_front.jpg
The 3 sets of 2 transistors on the left and on above the input jack are BD139 and BD140. The transistors in power section are TIP31GC and TIP31GC. The ICs are LF412CN.
Hi.
I´m referencing the Abasi Pathos schematic from here:
I noticed every inverting opamp stage gets its own voltage divider + filter cap connected to the non-inverting input, and I´m asking myself if I could use a single voltage divider (instead of 6) like a plethora of other pedals, connect all Vrefs together and call it a day.
Does it mean anything to the sound or noise floor?
Is there any reason for dedicated voltage dividers at all?
I plan to route a PCB for this pedal and I can drop it...
I'm back to Exar pedals tracing, I was a bit busy during the last weeks, and it took me almost a month to finish HM-02 Heavy Metal tracing. According to the pots and warranty card dates, the unit I have seems to be produced and sold in 1999.
It was challenging to trace because of a lot of wiring with resistors in heat sinks attached to them. PCB itself is single-sided and transparent in light.
Hi, I'm putting together a Troglodyte fuzz from the layout on dirtboxlayouts.blogspot and just wondered how critical the choice of NPNs are for Q1 and Q2. I've got a couple of low hfe (≈150) and just figured I'd throw them in there and see.
below some line6 M9 gutshots. I need to opened it to replace a bad LCD and took some pictures.
The M9 schematic is attached as well.
Maybe it help somebody.
There are several schematics that come up when you go looking for Yamaha NE-1 , and they have different ways of showing the dual pots orientation & it's a bit confusing for anyone new to these things. I wrote to Silentfly the first time I looked at this project years ago and his is a mistake in the schematic , and I think the wiring in the drawing of the pots in the Paul-in-the-lab schematic is at odds with the Freestompboxes one and possibly wrong. I know it's a simple thing to just try wiring...
Gut shots of Rocktek's Super Delay.
All the parts are identified but I have no time to draw the schematics at the moment.
Some traces are burned (due to inadequate power supply I guess). Someone fixed that with some jumpers (two orange wires). You may also notice that the black wire for the battery snap is on the hole marked with (+) on the PCB, and the red is on (-). But that's OK, the wires are reversed at the battery snap too, so everything is wired properly....
Hi,
I'm repairing at the moment a DOD 670 flanger that has what seems to be a shot SAD512D delay chip.
My pedal has a 110V power input, as I live in Europe and while I'm waiting to solve the current SAD512D situation I'm thinking in replacing the original small 110V primary power transformer for a 230V transformer so I don't need a mains voltage converter.
Just to let you know, theres versions of this pedal where the power transformer has 110V and 220V volts taps on the primary (the available...
I'm building a Prince of Tone for my Pedalboard but I found 2 different schematics: Aion's one and PedalPCB's one.
In addition of the different value of the input capacitor, the difference between the two schemes is in the clipping section.
Which one is correct? Or simply are different revision of the same pedal?
Another Caline overdrive. They're so cheap, I see it I buy it. With this pedal they heavily allude to it being Dumble inspired, and there are a lot of Dumble in a box pedals it could be based on.
Caline came out with e Big Muff clone too, the B-Fuzz , but I haven't bothered to open that up because I can tell you right now it sounds identical to my Nano Muff. What miniscule difference exists could owe to component tolerances.
You cannot post new topics in this forum You cannot reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum You cannot post attachments in this forum
Last post
CheapPedalCollector 
Last post
VitaliiBobrov 
Last post
Visualdistortion 
Last post
bbkassel 
Last post
aionios 
Last post
Ellerbrock Effects 
Last post
ppluis0 
