John Curl's Blowtorch preamplifier part II

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#84,021
I have encountered similar.
New carpet (synthetic) was installed in my lounge room and my system sound changed for the worse, ie nasty and irritating.
This led me to trying cable supports, and I used cheap (free) concrete rebar 'chairs', and this improved the sound to better than before.
If I am to try wood supports I have a particular Aus species in mind, and I would select examples many hundreds of years old, and for particular reasons.
Materials can make differences ime.


Dan.
 
#84,022
bcarso said:
Not wishing to deprive anyone of the joy of reading the entire account, I'll just quote an excerpt. The background is that the system had been set up for a month before the show, "broken in" etc. At the show:

"Something's wrong. This does not sound the way it sounded back home."...I spent five hours trying to figure out what it was. ... The show's about to start---it sounds wrong---something's wrong with the system---it's broken....But guess what? The power cord going from the wall to the preamp was missing one wooden block. So there was [sic] two inches of cord that looped down and touched the carpet. ... "

He asks why the block is missing (the setup guy ran out of blocks), and the guy is instructed to fetch another block, which is inserted under the loop.

"Aaaahhh. Now it sounds right---now we can go to bed."
Click to expand...

https://youtu.be/FYXckKwBRb0

se
 
#84,023
bear said:
Tell us more?
What is the mechanism suggested that is behind the increase in IMD with the different metals on these connectors? Very interested. What sort of signal levels? Is it linear with level?

_-_-bear
Click to expand...

Third and fifth...

Haversines

Nickel is a magnetic material, and will have a B/H curve as such. I use laminated nickel stacks as a magnetostrictive drive element for an ultrasonic welder for plastics.

As to stainless, it's permeability will be a function of the carbon content, thermal history, and machining.

If you do something to alter the carbon carbon, you can end up with permeability greater than 1. We have problems with stainless if we machine it, if we weld it and do not cool it down in a controlled fashion, and if we work the metal. Had a tube of non magnetic that had a slight scratch in the surface and it ruined the tube for our purpose. If we use some thousand grit on a stainless surface, it's magnetic.

If stainless is machined or formed into a connector part, it will become magnetic, special heat treating will then be required to recover the permeability to 1.john
 
#84,024
Hi all,
I know this is off topic but I'm lookin for some good answers.

I'm using an Audible Illusions M3A preamp connected to a Modulus86 amp. I've got two connection options.

One is 1m pseudo balanced ICs, per the Moduls86 website, connecting the AI M3A preamp to the Modulus86 amp.This option would require 20 foot speaker cables to reach a pair of speakers in an other room.

The other option is to put the Modulus86 near the speakers which would require 20 foot long pseudo balanced ICs and only 10 foot speakers cables.

I guess the real question is what is better; 20 foot long ICs or 20 foot long speaker cables?
All thoughts will be appreciated.
 
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#84,025
henrylrjr said:
Hi all,
I know this is of topic but I'm lookin for some good answers.

I'm using an Audible Illusions M3A preamp connected to a Modulus86 amp. I've got two connection options.

One is 1m pseudo balanced ICs, per the Moduls86 website, connecting the AI M3A preamp to the Modulus86 amp.This option would require 20 foot speaker cables to reach a pair of speakers in an other room.

The other option is to put the Modulus86 near the speakers which would require 20 foot long pseudo balanced ICs and only 10 foot speakers cables.

I guess the real question is what is better; 20 foot long ICs or 20 foot long speaker cables?
All thoughts will be appreciated.
Click to expand...
IMO stay with line level as long as you can, all other things equal.
 
#84,028
scott wurcer said:
Folks got carried away about connectors. As jn confirmed at audio frequencies the signal does NOT travel in the surface oxide. Silver sounds bright until it oxidizes, both nonsense.

Another one has turned up. Tunneling, tunnel diodes exist so whenever tunneling is around there must be diodes. Folks are just putting words together like the hucksters.
Click to expand...

Yes, but doesn't it have to pass through the plating and oxide layer?
 
#84,030
My general rule of thumb --- PA have plenty of current available... thus speaker cables can have high C without issue but low Ls is best for speaker cables. In preamps, the current may be limited to charge long cable lengths and high C..... so I would make the preamp cable low C.

Skr cable --- low Ls and Rs. preamp... Low Cp.


THx-RNMarsh
 
#84,031
bear said:
SY, you're a bright guy.
You probably know more about many things than I will ever hope to know.
You are also a moderator.

Your post gives the appearance of being one from a individual of significant personal insecurity, btw.

What you just said is an unwarranted personal attack, you ought to apologize and realize this.

_-_-bear
Click to expand...

That's SY.... the drive-by assassin shooting from the hip.


-RNM
 
#84,034
And what about pcb?
There are several dozen of different metal contacts, tin is bad conductor...

He asks why the block is missing (the setup guy ran out of blocks), and the guy is instructed to fetch another block, which is inserted under the loop.

"Aaaahhh. Now it sounds right---now we can go to bed."
Click to expand...

Looks like obsessive compulsive....
It is not fun.
 
#84,035
SY said:
Or just peek and tell everyone how exquisite your senses are, why using ears only isn't valid for determining what you hear, and by the way, here's some stuff to buy if you're sufficiently worthy.😀
Click to expand...

That post of SY.
Please read it again .
It seems to me SY was sarcastic with those that do not follow the procedure bear suggests in the quote.
In other words, IMO, SY was in agreement with bear.


Posts#84032
https://www.youtube.com/watch?v=wvKPaIWz5xk

George
 
#84,036
bcarso said:
"Something's wrong. This does not sound the way it sounded back home."...I spent five hours trying to figure out what it was. ... The show's about to start---it sounds wrong---something's wrong with the system---it's broken....But guess what? The power cord going from the wall to the preamp was missing one wooden block. So there was [sic] two inches of cord that looped down and touched the carpet. ... "

He asks why the block is missing (the setup guy ran out of blocks), and the guy is instructed to fetch another block, which is inserted under the loop.

"Aaaahhh. Now it sounds right---now we can go to bed."
Click to expand...

Surely this is very tongue-in-cheek?? I mean, he comes in, sees one block is missing and decides to pull everyone's leg the next few hours.
Tell me this is not serious!

Jan
 
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