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Dx2547 power supply issues
- Thread starter kaos513
- Start date
no but the contact him self said it will work perfect with the radio
Did you use the auxiliary 13.8v external power plug with another power supply to see if the noise went away?
Test results: Result #1 tested with Pyrmiad power supply on supply side of power supply no hum test result #2 with hp power supply no hum on supply side. so its something with my electrical.
I think there is an issue with load side of the power supply which indicates something is wrong some where, but noticed none of my other power supplies do not hum.
If this were up to me, I'd be ordering up another one. These things - power supply designs, change year by year - even by month.
I also used to build computer systems - older desktops. Had to deal with PC style cabinet installs a lot. So to me it was easier to part it out and put in a new one - then on a slow day go back and see what may have caused it.
I used to find the caps were the most likely culprits, but the ignorance of the customer is usually what killed the HD the system had and that is where I used to come in - and try to rescue the HD from system. Finding the replacement caps became a crapshoot because many of the types that were out there - so many of them fit a similar style of profile and a lot of others just sat on shelves never to be used because they couldn't fit the board or pinout or some exotic dimensional issues always came up.
Only I find that the PS usually fared pretty well, just the way the chassis of the Supply is, it runs marginal or low-margin headroom for a reason. They don't really fail fast, they fail from the oftentimes the power supply is not placed on a line conditioner where the noise and the spikes are smoothed out. instead they're often placed, plugged into, outlets shared by a lot of heavy load or draw / inductive loads - like refrigerators, Microwave - even stereo entertainment systems. Read this as - they just plugged it in to an outlet - wherever it was convenient.
I'd be lucky to see a surge protector - more than not, it was a multi tap outlet extension cord that claimed it was a surge protector.
The margin I'm talking about, was from the headroom and effectiveness of the recovery from a heavy draw to constant load - the dynamics and stress on a linear type can make it fail - the new switching types just simply lengthened the pulse to accommodate and the caps took on the rest to handle the load - then the whole system backed down quickly and the caps again absorbed and smoothed and stabilized from the draw.
So yes, caps can make a mess of it - but as you're seeing - you may have a live ground issue starting to appear instead. Those are dangerous. The load can be kept equal most of the time so you're unaware of the potentials that can build up across the outlet terminals - I had cats where I lived before - and by their actions have brought to my attention issues with outlets and grounds for them that were not done up right from the previous homeowner.
So in light of your situation - if you are still encountering a buzz - switch to a linear power supply for now. Why? At least you'd have better isolation thru the step down and the built in load caps, filters and conditioning the linear has - it's a drain yes - but the sting of a quick spike on an unprotected system oftentimes leaves the owner crying over their investment they didn't plan on losing to a power company issue and or power failure.
You don't know what the landlord did - or has been doing - but you do know what he does and he can impact you big time with a catastrophic failure if you're not ready for it.
To me I'd be looking at other options of protection for my equipment - including moving on to another location because if you stay, and something goes wrong - the landlord can easily blame you and or your stuff for causing it. The burden of proof is on you - hate to have to tell you that but in light of a landlord making changes to their electrical system without consulting you is placing you in jeopardy.
Call me overly cautions but I do consider you an important asset to this forum.
I also used to build computer systems - older desktops. Had to deal with PC style cabinet installs a lot. So to me it was easier to part it out and put in a new one - then on a slow day go back and see what may have caused it.
I used to find the caps were the most likely culprits, but the ignorance of the customer is usually what killed the HD the system had and that is where I used to come in - and try to rescue the HD from system. Finding the replacement caps became a crapshoot because many of the types that were out there - so many of them fit a similar style of profile and a lot of others just sat on shelves never to be used because they couldn't fit the board or pinout or some exotic dimensional issues always came up.
Only I find that the PS usually fared pretty well, just the way the chassis of the Supply is, it runs marginal or low-margin headroom for a reason. They don't really fail fast, they fail from the oftentimes the power supply is not placed on a line conditioner where the noise and the spikes are smoothed out. instead they're often placed, plugged into, outlets shared by a lot of heavy load or draw / inductive loads - like refrigerators, Microwave - even stereo entertainment systems. Read this as - they just plugged it in to an outlet - wherever it was convenient.
I'd be lucky to see a surge protector - more than not, it was a multi tap outlet extension cord that claimed it was a surge protector.
The margin I'm talking about, was from the headroom and effectiveness of the recovery from a heavy draw to constant load - the dynamics and stress on a linear type can make it fail - the new switching types just simply lengthened the pulse to accommodate and the caps took on the rest to handle the load - then the whole system backed down quickly and the caps again absorbed and smoothed and stabilized from the draw.
So yes, caps can make a mess of it - but as you're seeing - you may have a live ground issue starting to appear instead. Those are dangerous. The load can be kept equal most of the time so you're unaware of the potentials that can build up across the outlet terminals - I had cats where I lived before - and by their actions have brought to my attention issues with outlets and grounds for them that were not done up right from the previous homeowner.
So in light of your situation - if you are still encountering a buzz - switch to a linear power supply for now. Why? At least you'd have better isolation thru the step down and the built in load caps, filters and conditioning the linear has - it's a drain yes - but the sting of a quick spike on an unprotected system oftentimes leaves the owner crying over their investment they didn't plan on losing to a power company issue and or power failure.
You don't know what the landlord did - or has been doing - but you do know what he does and he can impact you big time with a catastrophic failure if you're not ready for it.
To me I'd be looking at other options of protection for my equipment - including moving on to another location because if you stay, and something goes wrong - the landlord can easily blame you and or your stuff for causing it. The burden of proof is on you - hate to have to tell you that but in light of a landlord making changes to their electrical system without consulting you is placing you in jeopardy.
Call me overly cautions but I do consider you an important asset to this forum.
Thanks for your help, im looking to getting some type of electrical filter to protect my equipment.