Electronics > Beginners

Ceramic caps from China

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iMo:
I got a shortwave cw transceiver kit ($18) from China, and ALL the ceramic (small brown discs) capacitors were around 50-100% off. They were labeled with the value. Thus I replaced all the caps and resistors and it worked fine.

wraper:

--- Quote from: treez on August 18, 2018, 10:20:51 am ---I  think what you got sounds ok...if you want accuracy in ceramic, you need C0G dielectric

--- End quote ---
It's not, and 150pF most likely would be C0G anyway. Also very unlikely that type 2 and 3 ceramic caps would go that much upwards in their capacitance in any circumstances.

Discotech:

--- Quote from: wraper on August 18, 2018, 10:18:44 am ---Is this an SMD capacitor assortment? Most likely they were just mislabeled.

--- End quote ---

It was these - https://www.aliexpress.com/item/Ceramic-capacitor-2PF-0-1UF-30-valuesX10pcs-300pcs-Electronic-Components-Package-ceramic-capacitor-Assorted-Kit-Free/32305092269.html

Old Printer:
I have read that "run of the mill" ceramic capacitors have a typical tolorence of -20% to +80%. I thought that was wacky, but have seen that in a few places. This was not in reference to any particular brand.

Audioguru:
Which is trustworthy? A Chinese capacitor with no-name-brand that was made by someone who knows little about capacitors and made by him in his basement? Or a capacitor made by a trusted international company in their factory in China? Their spec's and costs are a "little" different.

"Ali" companies are Chinese like "ebay". Who knows if they buy good stuff or junk. They both sell cheap stuff.

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