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There is a 10K resistor (R2) in series with the larger (100nf) input capacitor that is not used when the 4.7nf cap is engaged by the toggle switch. My quick question: Is this resistor intended to reduce the gain through the larger capacitor, to be more in-line with the smaller cap - or does it...

I finished a Chickenhead build with a few mods (after first building stock) and several socketed components: - Replaced the A10K boost with B10K - Replaced the B100K cap blend pot with A500K and wired in reverse (ala Naga Viper), giving a typical tone control sweep from most bass (full CCW) to...

According to Electrosmash among other sources Q1c / Q2b should be ~0.7v with a germanium pair in a "perfect" Fuzz Face. With a silicon FF as I understand, Q1c would typically be ~1.2v - 1.4v. But what about a hybrid fuzz face with low gain silicon Q1 and low gain Q2 germanium (Q2c is at 4.5v)...

Building on a FF topology, I am adding a pre-gain pot at input, currently using a C50K and leaving the ground open. I've tried a B50K and I think I am finding the C taper to feel more linear through the range. I am now contemplating a 100K for some additional cut to the input signal, but at the...

I have been tacking BC caps onto the back of boards, which works fine. However, I wish there was a utility / daughterboard for main boards that do not accommodate them - so the caps can be socketed along with the transistors they are paired with. In trying to find a workaround, I came up with...

The topology of the Carbon Black is almost perfect for a "standard" silicon Mk II ToneBender. The one provision I find missing - there is no emitter resistor on Q3, typically a 220R. Can this be compensated for through an adjustment to the collector bias, or maybe get away without it? If not...

On a couple fuzz pedals (FF and one knobbers) I've built on vero, I get a static or whooshing sound with the pedal engaged and guitar volume rolled back to 0, others I don't have this issue. All work great, besides this anomaly. I've checked, rechecked and reflowed solder joints, but it...

For a pedal with 3 knobs and a toggle switch, which layout do you prefer, or some other arrangement on a 125B?

I made so many mistakes building the stripboard, These not only included a solder bridge and having to remove a cap in the wrong place, but I had to rip out a board-mounted potentiometer - all 3 pins - that were in the wrong spot as well (don't do detail work at 2am, kids). Some of the track...

3x 2N2369 @ ~60, 80, 80 hfE. Biased to ~7.8, ~1.7, ~7.8. It is stupid loud. Unity is around 9:30. This is in a 1590B. I have since reworked the layout so it can be dropped into a 1590B or with pots flipped, into a 125B - along with a few other tweaks. You can see the pot pins on the bottom row...

So I have been experimenting (at reasonably loud household volume) with a silicon bender on my bread board the past few weeks. I started with the widely recognized GGG / Orman / RDV TBii schematic: https://generalguitargadgets.com/pdf/ggg_tb_m2p_sc_ns.pdf Comparing it with the Carbon Black (EDQ...

After a couple prototypes of my prototype test box :rolleyes: I have completed one that I am satisfied with... 3 switches L-R: Power, Bypass, Channel: front (PCB), rear (Breadboard) Bi-color LED indicates bypass (red) or active (green) The board inside has polarity protection, power...

..but the PCB doesn't accommodate it, do you just tack the cap to the transistor? I am talking for example putting a 120-150pF cap across Q2bc of a Si fuzz face

... I thought I'd bring myself up to speed on the newer DIYLC (its been a minute) by putting together a stripboard to centralize power / ground connections to a filtered power supply. I had seen several threads discussing the idea and had a try at a layout: The filtering section is pretty...

I found plenty of info to do a simple on-off SPST, but wondering if anyone here can share how to implement a SPDT with transistors. To illustrate in its simplest form, I am looking to have a red LED turn on as a normally closed circuit and when a signal is received by a transistor the red LED...

I came up with a great way to repurpose your old dried out pens.. 1 Bic Pen "Round Stic", with cap 1 breadboard jumper wire, with male pin 1 physically small capacitor - smaller than pen inside diameter. I used a .22uF poly Stranded wire of desired length Heat shrink tubing This choice of...

Hi, I am looking for a simple way to make a socketed a/b cap switch. I have attached one way I was thinking, but concerned it might be a bit chunky. Maybe wire the switch to a small piece of stripboard with socketed caps instead? What are other / better ways? Thanks..

Hi, I've been lurking for a while, but its time for a first post.. Some background, and 2 related questions: My breadboard (2x Busboard 630) is mounted to a 1/4" thick MDF base using the backing adhesive. I am building a Sandspur and prototyping some mods with BC108s and getting a decent amount...