11-05-2017, 08:56 PM
About X/Y safety caps:
If you look at most sch, like this one
http://www.nostalgiaair.org/Resources/139/M0013139.htm
you will find a filter cap(s) - here it is #90, a pair of caps from each line to chassis, that filter noise from the AC line to keep it from screwing up reception.
Now these caps, placed across the piwer, in case of failing in the short circuit mode will create problems, from blowing up to electrocuting a person who touches the chassis if grounded himself. They later got the monicker "death cap".
Nowadays there are caps, called safety caps, that are guaranteed not to short and will always fail open. They are specifically rated in AC Volts. X-caps can be placed across the line and Y- caps - from lines to chassis.
This, for instance, is a safety X and Y rated cap.
https://www.mouser.com/Search/m_ProductD...gL_GvD_BwE
If you look at most sch, like this one
http://www.nostalgiaair.org/Resources/139/M0013139.htm
you will find a filter cap(s) - here it is #90, a pair of caps from each line to chassis, that filter noise from the AC line to keep it from screwing up reception.
Now these caps, placed across the piwer, in case of failing in the short circuit mode will create problems, from blowing up to electrocuting a person who touches the chassis if grounded himself. They later got the monicker "death cap".
Nowadays there are caps, called safety caps, that are guaranteed not to short and will always fail open. They are specifically rated in AC Volts. X-caps can be placed across the line and Y- caps - from lines to chassis.
This, for instance, is a safety X and Y rated cap.
https://www.mouser.com/Search/m_ProductD...gL_GvD_BwE
People who do not drink, do not smoke, do not eat red meat will one day feel really stupid lying there and dying from nothing.
![[-]](https://philcoradio.com/phorum/images/bootbb/collapse.png "[-]")
