What value cap to bypass power supply cap?

Oh I see. That makes sense, but I thought you want the bypass caps as close to the power supply caps as possible? The further away the bypass cap is, the less effective the filtering, no?

I thought the 0.1 microF cap will handle those high frequency noise you just talked about.

I would connect 12 capacitors parallel cap #1 to #12 to connect back to #1 (form circle). Now connect rectifier's output to cap #1 and load to cap #7 (opposite side of the circle). High frequency bypass cap should be, in my opinion, at the load to eliminate any wire inductance that can slow down response. If not then at least 1uF cap at main cap #7. Don't spend too much money since you already have very good (film) main caps and might not gain much from Mundorf caps. What kind of wire you use for connection?

Forgot to ask you question about 938s - I found that marked absolute phase doesn't correspond to membrane going forward when connecting battery plus to red and battery minus to black terminal. I tried opposite phase and got worse leaner sound. Is it possible that this phase inversion was done by Hyperion on purpose?

Hi Kijanki, I will need to think about your wiring scheme to make sense of it. I'm not an experienced DIYer.

I think I will use high purity copper wiring with Teflon jacket.

As for the Hyperions, I'm not sure if I can answer that question. However, there was some controversy with phase of the midrange drivers on the 968s:

http://www.iar-80.com/page157.html

Dracule1, the only purpose of this scheme is to increase wire current delivery since capacitors are charged in narrow current spikes of very high amplitude. You can connect them in series but be sure to use as thick wire as possible and to connect load to the last capacitor in the chain.

Let's turn this up a notch ... as long as you have the hood up and soldering iron out .. you may want to construct a Snubber or Tank filter

SNUBBER Pdf

As your diodes convert AC to DC they switch on and off ... this cycling creates a ringing which can be tamed/toned down by placing a Snubber filter between the diodes and the PS caps ... read the PDF for field level box seats behind first base ... as again I’ve merely gotten you in the stadium

Here is an interesting read/point of view from one of my Sensei’s who likes to frequently poke me in the eye with a sharp stick to keep me in align

“Lets talk about FACTS. The AC powered audio devices in fact DON'T USE AC VOLTAGE AT ALL !!!
They are all DC devices and hence they need clean DC not AC. So creating "pure sine" is a most stupid, utterly heretic waste of time.
The AC, after entering our gear, becomes straight away brutally rectified into DC and that is the end of the road for the sine. Then the big electrolytic capacitors accumulate the electrons in a "bottle". These electrons become a source of energy for the active devices in our gear. They are being released slowly as a DC current.
THESE ELECTRONS HAVE NO MEMORY of their "childhood". They do neither remember nor care if they arrived in a form of perfect sine, cosine, square wave, or chaotic ripples. As long as they arrived, their sins are forgiven in the capacitor and they are purified. So in other words - the hi fi gear is indifferent to AC shape.

An absolutely another story is RFI. This frequency is millions times higher than the AC frequency. It behaves like radio-wave and it can penetrate the gear.

The problem is that the RFI can enter gear DESPITE the galvanic separation by transformer and despite filtering effect of capacitors in power supply. The RFI becomes the Trojan Horse of AC grid power system in our gear.

Getting rid of these is a bit tricky. But my advice is - that our intervention is focused on hundreds of kilohertz and not close to 50 Hz AC. So the intervention is very gentle, very low order, and nothing to do with our regular current feeding the gear.

The filtering is achieved by two opposite effects: parallel capacitive shorting and series inductive blocking.
The kindergarten explanation for non-engineers is that for high frequency - a capacitor presents a SHORT, and coil - presents a high resistance (impedance).
So a RFI noise rides by the AC cabling to our house very happy, like a Porsche on the autobahn. But when it arrives to the filter - the road becomes blocked by the coil. Oh shit thinks the noise, getting through is gonna be real tough. But then it notices an alternative route - an easy one - via a cap. It chooses the easy route and ends up in the ground. Dead. That's our noise trap. That applies of course to very dumb Porsches only. This method does not affect the AC performance because the cap is VERY small and the coil has a DC resistance of milli-ohms. Literally - of a foot of thick wire. So the impulse response of the AC source to the amplifier demand is not limited. We say that the supply is NOT CHOKED.

The audible effect depends on many many factors - the circuits in gear, the internal filters commonly built in, the ground quality and arrangement in the house, the type of devices playing together etc. It is IMPOSSIBLE to predict the degree of improvement, but strangely - the results are very consistent

END OF POKE IN THE EYE RANT

Lijanki .. OK I shall petition the federal government and the Treasury Department to put Almarg picture on the hundred dollar bill and your picture on the fifties ... the denomination value has nothing to do with your actual worth ... but only that the $100 are already occupied by Al’s picture

You are both the best at removing any self interest when giving a subjective opinion and Audiogon is lucky to have these two crown jewels in their in their collection

Keep up the good work

Dave