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Low-radiated noise bench linear power supply

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Sariel:
Hello,

I'm seeking recommendations for a linear power supply without any constraints on budget or brand.
While I’ve come across older discussions on this topic, I’d like to gather new insights and suggestions as of 2024.

My focus is primarily on super low-noise analog circuits, such as amplifiers and receivers.
For my lab bench power supply, I'm looking for a solution with minimal radiated noise, as this has been a recurring issue when working with high-gain, low-noise amplifiers.
I’m less concerned about conducted noise like ripple, since I typically use LDO regulators on my boards.

The main issue I encounter is the radiated noise from the power supply itself, which tends to interfere with my sensitive circuits.
I can easily detect switching frequencies from test equipment, and I’m looking for a power supply that is well-shielded and has negligible radiated emissions.

Are there any specific models you’ve used that have performed exceptionally well in these aspects?

Thank you,

tautech:
Would suggest only pre 70's linear PSU's with analog gauges......if noise sensitivity or your workflow is so subject to local radiated emissions.

tautech:
We need specify standards that PSU's might need to meet.

FWIW
4ch SPD4000X specifies:
EMC Class A test and measurement products in compliance with European EMC Directive 2014/30/EU

BILLPOD:
Battery, (ies)?????? :-//

nctnico:
EMC compliance says very little as there can still be a lot of radiation emitted.

The suggestion for older linear power supplies (ones without a digital readout) is a good one. Otherwise existing PSUs can be placed in shielded housings and / or positioned far away.

And then there are batteries but I don't see how batteries would work for a circuit that needs to become a product at some point.

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