Capacitor Substitution Box, Silver Mica capacitors, 15 values, 47pF – 1000pF @ 500VDC.
CSUB_SMC Capacitor Substitution Box
Use: Tone stack, frequency shaping, etc.
OK, I admit it. You can calculate circuit values until the cows come home but sometimes it’s so much easier and faster to just dial it in. I’ve been a ham and involved in engineering for over 35 years, and I gotta tell ya, these are undoubtedly some of the most indispensable tools I have ever had.
For the Capacitor Sub Boxes, I decided to provide the most common values that we typically see in guitar amps. Just like the resistor sub boxes, it seemed pointless to include some oddball values that we wouldn’t use anyway. The poly caps are rated at 630VDC, the ceramics are 1KV. The electrolytic caps in the ECC-HV type Sub Box are rated at 500 volts DC, and are 105 degree C parts, while the electrolytics in ECC-L type Sub boxes are rated at 50 volts and are meant to be used for experimenting with the capacitor value in cathode bypass caps in preamp and power amp circuits.
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