Recent content by rossbalch

How do CMOS gates differ from op-amps when it comes to configuring their gain and frequency response? I normally use https://nz.element14.com/op-amp-gain-calculator but don't know the theory when it comes to CMOS.

I've edited the silkscreen of polarised components to be painfully obvious to make spotting JLC orientation weirdness as easy to spot as possible.

I think we're being a little over critical of the guy here. I think he was just feeling the grief of a failed venture and wanted to share his story. I do think it's valuable to tell because everyone will have their own circumstances. I do think it's a good reminder, and opportunity to burst the...

The LT1054 seems to have become favoured more recently for this and has a high clock and doesn't seem to have the heterodyning issue.

I have a really small work space and this keeps everything really compact and incredibly quick and easy to find for me. The deckboxes can be bought really cheap from TEMU. Or if you like you can use trading card trays instead.

Alexer1 (Sovcom) on eBay

Agree, course was super basic. Didn't cover anything that would actually help you make a GOOD PCB. No discussion of good layout technique, good grounding practices, routing for low noise and oscillation etc. Worthless.

Nice, these are cool mods. I think a big part of the issue with the Median is it isn't based on an 1176 actually but an Orange Squeezer I think.

I bought the PCB design one and I regret it. It was really basic. I was hoping for info on how to make good layouts, run traces for optimal noise reduction, reducing oscillation etc, but it was a really basic how to use Ki-Cad course essentially. IMO there's nothing you can't learn here or over...

TBF I think a lot of people gave up building PCBGM boards because of all the mistakes.

Curious if you tried a 2n3903? Have a bunch in my box but haven't used them in a circuit yet.

Yeah I was going to suggest just doubling the filter, you need a dual gang pot though, and finding a dual gang C pot can be tricky (though I think Tayda has them).

I think one problem that is hard to overcome is that the Tweed has that specific type of phase inverter that distorts in a particular way, and you can't really pedal that out of the amp. No matter goes in front, it will always go though that phase inverter and sound tweedish.

If you really want to get close with what you already have, you could just use 2x 4148 and 1x BAT41 (or 1n5817) in each direction. Or just the two 4148 honestly. edit: data from here https://rhpfelectronics.com/rhpf-electronics-handmade-guitar-pedals-in-switzerland/rhpf-nerd-lab/iv-bench/

Anyone have recommendations for testing points? A reminder of the schem. Also do my trim pot / multi turn, directions make sense?