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Main => Monitor/Video Forum => Topic started by: Vectorfire on January 31, 2020, 09:15:45 am

Title: Will Powering a CRT monitor and DC power supply off the same AC bus be an issue?
Post by: Vectorfire on January 31, 2020, 09:15:45 am

As titled, will powering my CRT monitor and the DC power supply for my Jamma harness off the same AC bus create any issues like noise or interference onscreen?

I'm looking to have a functional JAMMA harness as well as a GroovyMAME PC option.
I'm also concerned about powering the Jamma harness and having that create some kind of a loop going back to the monitor.

This is what I'm thinking insofar

https://imgur.com/UDkMLx3

Title: Re: Will Powering a CRT monitor and DC power supply off the same AC bus be an issue?
Post by: lilshawn on February 03, 2020, 02:25:22 pm

you are more likely to get noise in your video stream by using all the switchers/adapter/converters than you would by sharing AC.

that said... it NOT sharing ac (and grounds) that is the most cause of noise.

Title: Re: Will Powering a CRT monitor and DC power supply off the same AC bus be an issue?
Post by: MKFan4Life on March 22, 2020, 03:37:12 am

I'm sure most decent power supplies have line filtering to minimize their noise from affecting other loads on the same circuit. I guess it depends on the type of power supply and the quality. But I wouldn't think you'd be any more likely to get a ton of interference by using a single AC input into your cabinet to power the individual items than you would if you had similar items, even in separate electronic devices, all plugged in to the same 15 or 20 Amp circuit (sometimes in different rooms in your house). Would be irritating to have to pull power into the cabinet from a separate circuit in your home though. You'd have to identify which outlets in your house are not on the same circuit (easy enough), and then run a drop cord from the cab to one of the separate circuit outlets, which is not ideal really.