Quote:
Originally Posted by AndrewJ
I agree that if a dewstrap is fitted, the outer shell can become live when the unit turns off, but its also much harder to short it.
I have actually seen low side units where the outer shell ( in the controller ) was wired to 12V  , hence was always live, even when not connected.
I only use proper 2.5mm DC connectors on my units, just to avoid this.
Andrew |
I agree that RCA connectors are....at best...indeed a bad choice> However I kept the design within was was currently available for comercial straps and indeed most amateur equipment.
An easy fix is to heatshrink cover your RCA jacks & connectors but I know only too well some day some one will be very unhappy due to a short... I have practised Murphy's law more than once.
The solution is a high side switch. The problem is getting a low rds on FET ("P channel")to handle this current.