Vintage Electronics Blogsphere

Caps Capacitors

How important is the physical size of capacitors that if the voltage and farads are identical?

I have an old hi-fi it needs new filter caps, hats are old 3 "x 1.5", replacements are 1.75 "x1.25". Both are valued at 10000UF, 50Volts.

Ah, yes ... The physical size of a capacitor is not really a problem these days with all new material used in the assembly thereof. A filter capacitor, if necessary, the diet requires the use of both. Because food has a negative effect (and positive) B + voltages. A good amplifier will have a good filter, then a good regulator output in the range (s) of power. , I would go with a higher voltage and the same value for the replacement of the cover of his age. Try to work 80-volt direct WVDC (current) @ 10kmfd. (10,000 micro farads). A capacitor is like a battery. It will take a charge as space between the plates, and what is in this space. What is in this area is known as the "dielectric". This is where the actual charge, or chemical action that occurs between the plates. Oh, a little warning for you: When you change your filter capacitors, that has the correct polarity, or condenser becomes hot and ventilation, or can even explode, creating a maze of electrolyte in the interior of your unit. It will take several hours to properly remove the electrolyte of the circuit (s) and surrounding components. I've done it myself many years ago. No I have to go through, trust me. Oh, yes ... The higher the voltage on a capacitor will change the materials chosen for the dielectric. Some mica capacitors used as a dielectric, or even air. Most caps filter, like those who want to replace, dried with age. This may take 20 to 50 years to occur and occur more quickly when exposed to excessive heat and / or sun. I used to play with High Voltage caps on .... ... used to recharge one at about 500 volts and leave a poor boy and watch it take to fly around the room. Although not thought to try this, never! In the seventies, was fun, but today, it could cause serious injury by the fact that children today should always wash their hands at school with the fear of contracting some influenza virus / cold. A high voltage capacitor must have resistance "bleed or a piece of wire connected to the terminals is to maintain the security personnel to handle and store in the table / on the platform. Always discharge a capacitor before working on any part of the unit, once the case has been eliminated. Same low supply voltage is not an exception, because the microprocessor may be exposed to an accident static discharge, which makes the device a boat anchor. I hope this is of some help to you and yours. Feel free to write. Happy Holidays!

Passive component distributor Podak ramping up polymer aluminum capacitor shipments
Taiwan-based passive component distributor Podak expects its shipment of specialty polymer aluminum Electrolytic Capacitors (SP-Caps) to reach 40 million units a month in the second quarter of 2010 compared to 30 million monthly in the first quarter, according to company chairman Jack Huang.

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