Powering an 82 digital bits with a Supercap

I guess if it works, then it works. I would be more reluctant to put in a highervoltage than the NAPSC does, rather than a lower one. I understand that the 52 for instance suffers from fried front panels if a Hicap (circa 24V)is used instead of the 13V feed from the Supercap.

Years ago I did try powering my 52 with two supercaps, one for the analog (via the Burndy) and one just for the 'digital bits' logic/display feed, expecting at least a marginal improvement. However the mute failed to disengage, so although all the panel lights were on, no sound was outputed. Just as well, since I would probably have bought a third supercap.

Ron
Dum spiro audio
Dum audio vivo

Ron,

Yeh I wondered if some functions would not work, but all seems OK.

The only observation I have it that if you diconnect and connect the NAPSC/82 with all the amps etc on there is no sound. However connect/disconnect the SC/82 with everything on (not the audio leads, never do this with power on) there is a slight click in the speakers as you add/remove power.
This suggests that maybe the NAPSC provides better isolation to the audio signal than SC, but if that was true then why not use this technique with the 52?

quote:

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Here are the FACTS:

- The NAPSC provides approx 25v

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Closer to 18V actually...

Not mine Andy, 25v

I tested using multimeter, I admit though I thought it was supposed to be about 18v.

My 82/NAPSC are mid 90's models I wonder if the voltage changed?

I've been using this for some time, last time I asked one of the administrators about it I didn't get an answer.

Using the SLIC in this configuration for the digital 82 bits frees up the NAPSC for use with my Headline2. This works fine (the other way round doesn't really), but of course I know I'd get far better Headlins sound from a FC2 or HC2 (or even NAPSC2 I guess).

Time to add my observations as I bought a new Napsc2 for my 82 earlier this year, pensioning off the old one to power a new Headline.

Anyway, like others, I had kept my old Napsc well away from the rest of the kit, plugged it into the domestic ring, and assumed I needed to do the same with the new one. So, I had the 250 and Hicap on one spur, the Lingo 2 and Ikemi on the other and both Napsc's on the domestic ring. All seemingly "OK" although there seemed to be no real improvement with the new Napsc2 in place and, after a while, I became increasingly disappointed with some bass "wallow" and general loss of sparkle. I played around with speaker positioning, re-dressed the cables, hoovered tweeters, re-assembled the Fraim etc. but all to no avail. Until, that is, I swapped the sockets between the Lingo and the Napsc2 and it was revelatory.

Of course, some would suggest this was down to removing the Lingo effect however, as it had been on a separate spur this couldn't really have been the case. Rather it appears that it was down to the 82 being powered by a Hicap and Napsc using different earths - the spurs have a shared and dedicated earth.

If anyone is in a similar position, try it. It has made an utterly gobsmacking improvement.

Dave

On the 252/SC, Naim recommend that the burndy and SNAIC are routed as closely as possible to each other to reduce any loop between the earths in the two cables.

A much smaller version of the effect you describe, I'd say.

cheers, Martin

E-mail:- MartinPayne (at) Dial.Pipex.com. Put "Naim" in the title.

[QUOTE]Originally posted by greeny:
[...]
So I did a bit of investigation with a multimeater, then used the lead to connect the S/C digital supply connection (the one above the Burndy connector) to my 82, replacing the NAPSC.
[...]
I can't hear any audable difference, but given the SC is designed for this purpose and the talk of the NAPSC poluting the mains supply I would expect it could only make things better.

So anyone else do this? ...
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Hi greeny,
when I 'supercaped' my 82, my dealer gave me that special cable to be
able to directly connect the digital section of the 82 to SC.
Like you, I couldn't realize a real difference, maybe a small improvement,
and i guess the SC could't make things more badly than the NAPSC ;-)

The 82 here works also fine using the SC in this way ...

Regards,
Hannes

Firstly, Appologies to Andy, Yes my NAPSC does give 18v, I must have been also checking HiCap o/p and got confused.

Secondly: I have the official line from Naim on this, which is although it will/may work it will reduce the life of the 82 due to insufficient voltage being maintained accross the regulators/relays etc. This has apparently come from Roy George so should be taken as gospel I would have thought.

I reconnected my NAPSC last night

quote:

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Originally posted by greeny:
Firstly, Appologies to Andy, Yes my NAPSC does give 18v, I must have been also checking HiCap o/p and got confused.

Secondly: I have the official line from Naim on this, which is although it will/may work it will reduce the life of the 82 due to insufficient voltage being maintained accross the regulators/relays etc. This has apparently come from Roy George so should be taken as gospel I would have thought.

I reconnected my NAPSC last night

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The problem is that the digital supply from the Super-Cap is pre-regulated down to the (approx) 12V required by the internal circuitry of the 52 and 82. However, the 82 has an extra stage of regulation, because it expects to be getting 18V in. The regulators in the 82 don't really do their job properly unless they see a higher voltage than the eventual 12V (needs to be at least 14V, IIRC).

That's why it shouldn't be done.

-=> Mike Hanson <=-

Mike's post is in line with PS's response some time ago when this was bought up - if in doubt, use the search bicycle.

Rico - SM/Mullet Audio