Search results

That cap coming out of the top is the perfect spot for a tube

I recently discovered a couple of boxes of BD139/140s in my stash (that I was given years ago and didn't realize were particularly useful). I've tested around 20 of each out of a couple of hundred, and about 25% are 65-85 hfe. Guess I'm doing some silicon fuzzes 😅

My TC3 doesn't even read germanium whatsoever, so I'd probably verify another way

As long as the voltage rating is a bit above the maximum voltage you're going to see, then whatever is going to fit will be fine. You can leave that cap out - there is zero chance it is doing anything that is audible, and I doubt you're even going to be able to measure its inclusion.

If you're concerned about corrosion, pull a couple of feet off and wipe it lengthwise with paper towels. Voila - all corrosion gone!

For subminiatures, I've mostly dealt with Langrex - I did have a whole batch of 5672 pentodes (very similar to a 5678) that had heavily corroded flying leads that broke as soon as the tubes were handled, and they replaced them all no questions asked.

Every single FET circuit I've ever played with has sounded a million times better at 18-24v.

Do you have a pedal with buffered bypass? Put it in the front of the chain with everything off and see if it makes a difference.

You can use any kind of capacitor your want there. Electrolytics are cheap, and in that position they're out of the audio path so no need for anything super fancy. There's not even much DC derating of caps to worry about. Most people would prefer to work with THT electros over a SMD MLCCs

Updates, and an ETA on I/O boards?

There are no parts being hoarded by anybody that is making them hard to find for builders. It's a you problem my friend

G'day, Bought a couple of cheap grab bags of germaniums out of Eastern Europe from eBay, and was expecting a reasonable rate of failure due to leakage/poor gain - and to my shock, there was only a single bad transistor! I've got: *half a dozen GT402B's (100-150hfe, <150uA of leakage) *handful...

Yo dawg, I heard you like buffers.

Ok bizarre - some quirk with zone transparency that I solved by opening the file on another machine, saving it, then going back to the original machine. Fixed now!

I don't want it for editing my silkscreen. I like having a good idea of where everything is and where it's going so I can visualise the PCB better. Every other version of Kicad has had this by default. It's on. The silkscreen is hidden underneath the copper layers - if I turn f/b copper off I...

I feel like I am going crazy here. I've used Kicad 5 through 9, and a lot of the PCB editor changes have been particularly frustrating. My newest problem is that no matter what I do, my silkscreen layers disappear under any copper layers making it very hard to see what's going on. PCB created...

Use whatever ceramic over about 47n you've got available - these aren't anywhere near as necessary now with better electrolytic construction as they used to be

Pull R9/10/11. If you don't have ~250v on the positive of C1 you have a power supply problem

Fwiw, I've had the occasional board with the same issue - both PedalPCB boards and those I've had manufactured. Out of interest I pulled components and the pads themselves had zero continuity. I think it's just the rare one that slips through QC

My dude, you can literally follow the traces, through the vias, on both the PCB as well as the build docs. There is zero confusion about where any of it goes for the couple of traces I mentioned as the entire path is visible with both sides of the PCB visible on an image. Either way, I fixed...