Home |
Search |
Today's Posts |
#1
|
|||
|
|||
voltage drop of a old silenium rectifier
I want to build a hi current 12v supply, I know where i can buy a
6-12v 100amp battery charger cheap. This charger had silenium (dont know the proper spelling) rectifiers. Im thinking the transformer must be alot higher voltage than a similar one in a modern charger using silicon diodes. If i know the drop than i can figure the transformers output voltage. So does anyone know the voltage drop of these old rectifiers? |
#2
|
|||
|
|||
voltage drop of a old silenium rectifier
|
#3
|
|||
|
|||
voltage drop of a old silenium rectifier
|
#4
|
|||
|
|||
voltage drop of a old silenium rectifier
John Popelish wrote:
wrote: I want to build a hi current 12v supply, I know where i can buy a 6-12v 100amp battery charger cheap. This charger had silenium (dont know the proper spelling) rectifiers. Im thinking the transformer must be alot higher voltage than a similar one in a modern charger using silicon diodes. If i know the drop than i can figure the transformers output voltage. So does anyone know the voltage drop of these old rectifiers? The normal drop (at rated current) of selenium rectifiers is about 2 volts per plate. After Bill posted .9 volts, I began to doubt my memory and looked it up in a reference (Reference Data for Radio Engineers, 5th Addition). A typical rating is 27 volts reverse per cell, 600 mA to 1950 mA per square inch (that 100 amp supply must have a lot of square inches of selenium) and with a capacitive or battery load, 1.6 volts drop at rated average current. However, they have an essentially resistive aspect from about .5 times rated current to 2.5 times rated current. That is, the forward drop climbs linearly from about 1 volt at .4 times rated current to 3 volts at 2.5 times rated current. |
Reply |
Thread Tools | Search this Thread |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Forum | |||
FCC: Broadband Power Line Systems | Policy | |||
Hallicrafters S-20R question | Shortwave | |||
Building a psu for linear amplifier | Homebrew | |||
Why different rectifier diode voltage ratings? | Homebrew | |||
Why different rectifier diode voltage ratings? | Homebrew |