SE distortion

[Miles Prower]

Just for interest,

I posted it some time ago (again for interest)

Resonant-choke Power Supply

There was a vogue for that back in the mid-'60s. It's a SLAGIATT^*. The idea is to turn the choke into a parallel tuned trap. That works to isolate one specific frequency. However, AC ripple isn't just one frequency, as there are harmonics. The problem is that a resonant circuit has a greatly decreased impedance for off-resonant frequencies. Sure, you get rid of the fundamental (100Hz or 120Hz depending on where you're at) but let all the harmonic garbage through.

You're better off implementing a conventional RLC LPF to attenuate ripple frequencies.

^*Seemed Like A Good Idea At The Time

 

[M Gregg]

but let all the harmonic garbage through.

Its interesting,

that the PSU is part of the signal path (no its not its just the supply)..but as we know DC is just DC..

Regards
M. Gregg

 

[dirkwright]

I think that if someone prefers SE power amps, then in order to get maximum enjoyment from it, they should also get very high efficiency loudspeakers. Something on the order of at least 105dB/W would seem to me to be appropriate. Horses for courses, as they say....

 

[Shoog]

I was listening to my new SE (not very spectacular ECL82 spud) and it sounded very nice. In fact it sounds good enough to be a keeper - better than it has any right to be. However i noticed the woolly bass and the slightly constrained top end. These were obvious from the moment I switched back to my PP amp.
I stand by my belief that the midrange sounds good because of the constraint around it.

Shoog

 

[hpeter]

If you have a choke on the power supply,

Try putting a 0.1uF polypropylene 1000V across it just for fun, if it makes a difference..whats wrong?
You can easily take it off again..

Regards
M. Gregg

swinging choke ?