The Paul Hynes SR7

[opus101]

16 minutes ago, octaviars said:

 

The specs on the Keces are not so good, output impedance as high as 1.8 ohm compared to Pauls SR models with 0,03 ohm is just in a different league.....

 

Looks to me to be 3mohm (0.003ohm) which isn't entirely believable unless it implements Kelvin sensing (4 wires, 2 power and 2 sense). Also that the impedance is specified to 100kHz seems quite far-fetched as maintaining such low inductance (3mohms @ 100kHz is the reactance of about 4.7nH or about 5mm loop circumference of wire) would be extremely hard.

[opus101]

What would help credibility for the specs would be disclosing how he tested the supply to arrive at those numbers. I'm not saying they're impossible, just from my pov rather difficult to achieve. But then there's plenty I don't know about PSU design....

[opus101]

I'm not likely to become one of his customers so I'd prefer not to engage his time and attention to no good business purpose. I merely point out that to me, they do look rather optimistic. OTOH 1.8ohms looks like a rather poor result for an output impedance, as does 1.6mV of noise.

[opus101]

Looks that fuse is in your mains inlet. Mains is AC and hence is changing direction 100 or 120 times a second.

[opus101]

Yes but the question I was responding to was about current flow, not energy flow.