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Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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#1
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Quick Capacitor question
Hi all,
I have two identical circuits - both dead, so I started checking one and after going through bunch of dead parts (it's power amp) - dead HexFET, dead inverter circuit I hit some capacitor that shows resistance of 3-4 Ohms both ways (I don't have cap meter). Anyway, here is what's written on this cap (it's a cap for sure - marked C5 and has +/- on it): 1st board: 106M 10K - this K has small horizontal lines above and below the letter) 0126 2nd: 106M 10K (same K) 0234 According to the table that I have found it is 10*10^6 +/- 20% pF, so it is 10uF +/- 20%. Please let me know if this is correct Thanks! |
#2
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Quick Capacitor question
One more question..
How would you determine voltage rating of the capacitor if it's not written on the cap? "Eugen T" wrote in message . .. Hi all, I have two identical circuits - both dead, so I started checking one and after going through bunch of dead parts (it's power amp) - dead HexFET, dead inverter circuit I hit some capacitor that shows resistance of 3-4 Ohms both ways (I don't have cap meter). Anyway, here is what's written on this cap (it's a cap for sure - marked C5 and has +/- on it): 1st board: 106M 10K - this K has small horizontal lines above and below the letter) 0126 2nd: 106M 10K (same K) 0234 According to the table that I have found it is 10*10^6 +/- 20% pF, so it is 10uF +/- 20%. Please let me know if this is correct Thanks! |
#3
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Quick Capacitor question
"Eugen T" wrote in message ... One more question.. How would you determine voltage rating of the capacitor if it's not written on the cap? What is the supply voltage in the circuit? Could the capacitor be 10 volts? A 10 uF capacitor with no voltage marked is unusual. |
#4
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Quick Capacitor question
One more question..
How would you determine voltage rating of the capacitor if it's not written on the cap? What is the supply voltage in the circuit? Could the capacitor be 10 volts? A 10 uF capacitor with no voltage marked is unusual. Voltage rating of a capacitor does not affect the properties of the circuit unless it is undervolted. You can always use a higher voltage rating than in the original circuit for capacitors. The printing sometimes wears off of components and it is no longer visible, or it may not have been on their if some other marking from the manufacturer identifies the capacitor. I would wander around www.digikey.com (download the capacitor section of their parts catalog) and look at the different sizes, types, and manufacturer ids. |
#5
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Quick Capacitor question
Thank you all for your suggestions.
I looked at the circuit - it has +6, +15 and +/- 80V power lines attached to it. The capacitor's (+ means that it is an electrolytic cap, right?) positive terminal is attached to source of one mosfet and drain of another mosfet - both of those FETs (IRL640) are powered by 80V power supplies. Its negative end is attached via 3.5k resistor to collector of small BJT transistor (MPSA42). What kind of conclusion can I draw from this regarding capacitor's appropriate voltage? I went to local component store and *sizewise* 10uF 16V and 25V caps are quite similar to this one (well, my cap is axial, but no local stores carry axial caps, so I was looking at ones that have 2 legs at the bottom). 10uF 100V are massive compared to mine "Michael A. Covington" wrote in message ... "Eugen T" wrote in message ... One more question.. How would you determine voltage rating of the capacitor if it's not written on the cap? What is the supply voltage in the circuit? Could the capacitor be 10 volts? A 10 uF capacitor with no voltage marked is unusual. |
#6
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???????????? Quick Capacitor question
I thought there was a new type of capacitor called " Quick Capacitor"
"Eugen T" wrote in message . .. Hi all, I have two identical circuits - both dead, so I started checking one and after going through bunch of dead parts (it's power amp) - dead HexFET, dead inverter circuit I hit some capacitor that shows resistance of 3-4 Ohms both ways (I don't have cap meter). Anyway, here is what's written on this cap (it's a cap for sure - marked C5 and has +/- on it): 1st board: 106M 10K - this K has small horizontal lines above and below the letter) 0126 2nd: 106M 10K (same K) 0234 According to the table that I have found it is 10*10^6 +/- 20% pF, so it is 10uF +/- 20%. Please let me know if this is correct Thanks! --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.729 / Virus Database: 484 - Release Date: 27-Jul-04 |
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