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(Topic ID: 135994)

Value of this ceramic capacitor?


By ForceFlow

5 years ago



Topic Stats

  • 8 posts
  • 5 Pinsiders participating
  • Latest reply 5 years ago by barakandl
  • Topic is favorited by 2 Pinsiders

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2015-08-16_02.50.38.jpg

#1 5 years ago

There is a ceramic capacitor on an Allied Leisure PCB that I wanted to double check since this is a very early solid state board that might not adhere to expected conventions.

It looks like it has ".01M 16v" printed on the front and "Y5F" on the back.

The schmatics do not not note the unit of measurement and I haven't see a cap measured in Mf before on a PCB. The other ceramic caps appear to be measured in uF.

Is the .01mF cap supposed to be 1uF?

2015-08-16_02.50.38.jpg

#2 5 years ago

from the net the M stands for ±20% tolerance

#3 5 years ago

Ok, so it's .01uF 16v 20% tolerance?

#4 5 years ago

yep

#5 5 years ago

Ok, thanks for the confirmation. Also, in studying the other boards some more, everything appears to be in uF unless otherwise marked. The credit board had one 100 pF cap--that seemed to be the only major difference so far, and the only one that was marked with a differenet unit prefix.

Additionally, I found out that around the 1960s and 1970s, MFD or mF was used instead of uF, which might be where the "M" came from that I found on the capacitor.

#6 5 years ago

What's the waxy dark green component in the top left? It looks like a tantalum cap... I didn't think those were around that early?

#7 5 years ago
Quoted from radium:

What's the waxy dark green component in the top left? It looks like a tantalum cap... I didn't think those were around that early?

Looks like a general purpose polyester cap, not used much these days.

#8 5 years ago
Quoted from radium:

What's the waxy dark green component in the top left? It looks like a tantalum cap... I didn't think those were around that early?

Polyeseter film cap. I think these are used when tolerance needs to be closer. Bally used one at C16 to time the display interrupt pulse. 20% tolerance there is probably too much.

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