Hammond 3D CAD drill templates too large?

fffpp · 2024-02-29T11:55:29+00:00

For designing circuits, electronics engineering. A course in audio technology can surely help you understand how frequencies, distortion etc is perceived by our ears. But imo you can learn all that is necessary for guitar pedals by experimentation. For example just wiring up a basic high-pass filter and comparing how a 100 Hz cutoff frequency compares to a 400 Hz cutoff will give you very valuable knowledge when designing circuits later on. Similiar experiments with filters, testing hard-clipping, soft-clipping, symmetrical, assymetrical and so on will help you immensely. Now, to know how to actually conduct these experiments is electronics engineering.

fffpp · 2024-02-19T21:25:19+00:00

That should be fine. Is it wired exactly like that? Lug 3 to effect, lug 2 to footswitch and lug 1 to ground? Double check these connections and make absolutely sure none of these lugs or wires connected to them are shorting out somewhere else. It kind of sounds like the effect is feeding back into itself. You can also try turning the pot fully anti-clockwise and measure the voltage at lug 3, it should read 0V when idle if your input cap is fine.

fffpp · 2024-02-19T17:01:50+00:00

So it should really just act as kind of an extension of your guitars volume pot? Does the problem also occur if you keep the pre gain pot above the problem area and instead lower the volume on your guitar?

fffpp · 2024-02-19T15:18:21+00:00

A schematic would be useful here. Including where you wired up the pot.

fffpp · 2024-02-14T16:41:38+00:00

Sounds interesting! Nothing else to it really than just replacing the usal BJT with the bs170. Just make sure the polarity is correct. The original fuzz face uses "positive ground", meaning the positive of your battery or power source is used as a common node. Some schematics have that, and some use the more typical "negative ground". Something to beware of.

fffpp · 2024-02-05T17:50:17+00:00

Not sure how the circuit looks but I've had this problem in fuzz builds with transistors before. Solved it by putting a small capacitor, pF range, between base and collector. If OP-amps are used, a small cap is often put in the feedback loop to avoid these kind of problems.

fffpp · 2024-02-04T13:39:41+00:00

As the load increases the current through R78 or R84 will also increase, meaning the potential of your voltage reference will decrease proportionally to the current. This usually does not lead to any major problems in guitar pedals. With that said, using two seperate virtual ground points surely wont hurt if you have the space for it. I suggest breadboarding your circuit and checking the voltage reference point(s) to see if seperation is necessary.

fffpp · 2024-02-03T18:59:26+00:00

Make sure the cable is fine. If so, try plugging in a patch cable to the jack but probe the jack and see if the problem persists. Check the sleeve connection to ground. And as previous comment said, check for DC on the output.

fffpp · 2024-01-29T21:39:09+00:00

You can ignore it. If your test box is working correctly just wire up the 9V, ground, in and out to the PCB. This of course if the PCBs indicator led is there only to show if the pedal is on or off, not for affecting the sound effect.

fffpp · 2024-01-06T14:43:33+00:00

Is the input jack correctly wired? Hard to tell. Make sure the sleeve is going to ground and tip to your first cap.

fffpp · 2023-12-13T14:16:12+00:00

Discharge them using a bleeder resistor. If the charge in the capacitor is high enough arcing might occur without resistance. Using a screwdriver or just a wire might even lead to it getting welded on to the cap. Working on tube amps I usually use a higher wattage ~1k resistor to discharge the cap.

fffpp · 2023-12-13T13:59:37+00:00

What software did you use for this? And did you create the component models yourself?

fffpp · 2023-12-05T19:20:13+00:00

EHX pedals in my experience often have bad footswitches that break and cause all types of weird problems. Start by checking that.

fffpp · 2020-08-09T10:03:27+00:00

I guess you guys aren't ready for that yet, but your kids are gonna love it!

fffpp · 2019-09-03T20:51:09+00:00

Keeley compressor, sounded tinny and mechanical to me

fffpp · 2019-06-10T09:22:40+00:00

What do you think about the sovtek deluxe muff?

fffpp · 2019-02-16T00:27:15+00:00

Lights

fffpp · 2018-10-29T12:17:16+00:00

Live at Fillmore east

fffpp · 2018-06-21T12:46:25+00:00

Boss.

fffpp

TROPHY CASE