I just got a request from someone who wants to CNC a front panel for his Muffsy MC Head Amp, and he wanted to use the logo and the font that are on the printed circuit boards.
The font used on the PCB is the built-in vector font in Eagle, which is proprietary. The Eagle font is ...
While I've been sharing a lot of my work on muffsy.com, I've never really clarified how my view is on people using my work (or derivates of it). This is now changing.
I've decided to release all of my content (barring a few exceptions) under the Creative Commons Attribution 4.0 International license...
I'd really like a stereo input selector with relays, but those things are hard to find! (Apart from some of dubious quality on the *Bay)
Better make my own then. This one's got a custom footprint for an ESP32 devkit module, but it can also be controlled with a rotary switch.
Total Harmonic Distortion: 0.00081%Total Harmonic Distortion + Noise: 0.01935%Signal to Noise Ratio: 82.3 dB (0 dBV output)Intermodulation Distortion: 0.0195% (ITU-R)
Dynamic Range: > 110 dB (THD+N < 1%)
RIAA Compliance: +/- 0.15 dB (20-20.000 Hz)
RIAA Equalization: Passive
Gain at 1 kHz: 32-43 dB, in four steps
Input Impedance: 17k-150k ohm, in fifteen steps
Input Capacitance: Optional
PCB Size: 84 x 56 mm
Total Harmonic Distortion: < 0.1%
Total Harmonic Distortion + Noise: < 0.1%
Signal to Noise Ratio: 71.8 dB (rel to 0.5 mV input)
Intermodulation Distortion: 0.001% (ITU-R)
Dynamic Range: > 110 dB (rel to 0 dBV)
Frequency Response: +0 / -0.1 dB (20-20.000 Hz)
Gain: 24.6 dB
Input Impedance: 50-300 ohm, in four steps
PCB Size: 84 x 59.4 mm
Measurements at 1 kHz, 0 dBV output, if not stated otherwise
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