[RFI] RFI-Free LED Monitor Recommendation

[John K9UWA]

Two years ago I did exactly the same as Clay. I purchased two new monitors that had External 19 volt wall wart supplies.
No problem I can make those go away. A month or so later at a hamfest I bought a 0 to 20 volt regulated Lambda 10A supply. 
The worst thing was carrying it from the sellers booth to the car. It must weigh a good 20 pounds. Problem solved. Clean DC
power and zero RFI noise.

73
John k9uwa


On 20 Jan 2021 at 22:31, Clay Autery wrote:

> Well, this is a 19VDC monitor using a power adapter, which is AWESOME!!!
> 
> If it has an RFI issue that you can't solve, you can simply find a DC-DC 
> converter (that is RF silent where you need it) and put it inline 
> between your power supply (assuming a good sized Astron or other with 
> PLENTY of spare capacity) and Bob's your uncle...
> 
> Another solution would be a dedicated 19VDC linear power supply....  OR 
> a 24VDC Astron with a linear voltage regulator inline to drop to 19 VDC.
> 
> ANY way you slice it, you can likely make this one quiet.
> 
> Don't bother buying ANY monitor/display with an INTERNAL power 
> supply....  (IMHO).
> 
> 73, ______________________
> Clay Autery, KY5G
John Goller, K9UWA & Jean Goller, N9PXF 
Antique Radio Restorations
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