Resistor tested by SIM?
Out of curiosity, has anyone evry built Rod Elliot's "SIM"? If so have you comparred resistors? Or anything that might be of interest.
Out of curiosity, has anyone evry built Rod Elliot's "SIM"? If so have you comparred resistors? Or anything that might be of interest.
Angela's Tantallums
Daniel,
I remember your recommendation, but I didn't realize that Partsconnexion's Holcos were magnetic.
I know that the Vishays are more pure, but I prefer a slightly warmer sound in my system anyway. May not be as accurate, but gives me more pleasure more of the time.
Anyway the if the Angela's Non magnetic Tantallums are more accurate than the Holcos then I am on the a winner either way.🙄
Daniel,I remember your recommendation, but I didn't realize that Partsconnexion's Holcos were magnetic.
I know that the Vishays are more pure, but I prefer a slightly warmer sound in my system anyway. May not be as accurate, but gives me more pleasure more of the time.
Anyway the if the Angela's Non magnetic Tantallums are more accurate than the Holcos then I am on the a winner either way.🙄
Re: Angela's Tantallums
FYI, <a href="http://www.mouser.com">Mouser</a> recently started carrying non-magnetic (i.e. no steel end caps), surface mount tantalum resistors from IRC in 1/4 watt and 1/3 watt.
se
PhopsonNY said:
FYI, <a href="http://www.mouser.com">Mouser</a> recently started carrying non-magnetic (i.e. no steel end caps), surface mount tantalum resistors from IRC in 1/4 watt and 1/3 watt.
se
DIY RESISTOR
Hey guys,
How about these?
Cherio,😎
Hey guys,
How about these?
An externally hosted image should be here but it was not working when we last tested it.
Cherio,😎
FOR JOKO ONLY
Here's a gridstopper for ya,
See you in audio heaven,😉
Here's a gridstopper for ya,
An externally hosted image should be here but it was not working when we last tested it.
See you in audio heaven,😉
RESI
Steve,
Just couldnt resist the resistor.😀
Kinda puts everything into perspective,no?
See you,😉
Steve,
Just couldnt resist the resistor.😀
Kinda puts everything into perspective,no?
See you,😉
NO INDUCTOR HERE.
Steve,
Would you believe these are real resistors?
Ayrton Perry non-inductive wirewounds,no kidding!
Rgds,😉
Steve,
Would you believe these are real resistors?
Ayrton Perry non-inductive wirewounds,no kidding!
Rgds,😉
Re: NO INDUCTOR HERE.
Yeah? They make no mention of that on their web page that I can see and from the photos, they looked like they were just a straight wind.
If they are non-inductive, Ayrton-Perrys, then... nice resistors! 😀
se
fdegrove said:
Yeah? They make no mention of that on their web page that I can see and from the photos, they looked like they were just a straight wind.
If they are non-inductive, Ayrton-Perrys, then... nice resistors! 😀
se
CHECK THIS OUT.
Have a look here:
http://www.audio-consulting.ch/products.htm
These guys are seeeerious.
Cheers,😀
Have a look here:
http://www.audio-consulting.ch/products.htm
These guys are seeeerious.
Cheers,😀
Re: CHECK THIS OUT.
Yes, I went to that page as well as the specific page for those "Silver Cathode Resistors" and nowhere did I see any mention of their being non-inductive with Ayrton-Perry winding.
se
fdegrove said:
Yes, I went to that page as well as the specific page for those "Silver Cathode Resistors" and nowhere did I see any mention of their being non-inductive with Ayrton-Perry winding.
se
I forgot to tell you...
Sorry Steve,
I happen to know that since they are customers of my partners' company.
The silver and copper spools come from him.
We visited them a few times and they showed these resistors too.
My first reaction was:ha,but these must be inductive unless...
That's how I know.
Again sorry,😉
Sorry Steve,
I happen to know that since they are customers of my partners' company.
The silver and copper spools come from him.
We visited them a few times and they showed these resistors too.
My first reaction was:ha,but these must be inductive unless...
That's how I know.
Again sorry,😉
Re: I forgot to tell you...
Ah, ok.
Well, they WILL be inductive. The Ayrton-Perry winding scheme doesn't eliminate inductance. Just reduces it over what it would be with a straight wind. And they'll be far more inductive and more capacitive than typical wirewounds because they're having to use a hell of a lot more wire and a hell of a lot more winds than if they were using a high resistance wire such as Nichrome.
So it depends which you hate most. Inductance and capacitance or Nichrome. 🙂
se
fdegrove said:
Ah, ok.
Well, they WILL be inductive. The Ayrton-Perry winding scheme doesn't eliminate inductance. Just reduces it over what it would be with a straight wind. And they'll be far more inductive and more capacitive than typical wirewounds because they're having to use a hell of a lot more wire and a hell of a lot more winds than if they were using a high resistance wire such as Nichrome.
So it depends which you hate most. Inductance and capacitance or Nichrome. 🙂
se
hey, that first spool is a roll of cardas litz from michael percy right? wound over a spent roll of toilet paper...
Inductance.
Steve,
Absolutely.
I'm not married to them and these ain't my babies either.
Just thought the pix we're a bit of a shocker.
I see you're not over it yet so I assume it had an effect.😀
Goodnight,
Steve,
Absolutely.
I'm not married to them and these ain't my babies either.
Just thought the pix we're a bit of a shocker.
I see you're not over it yet so I assume it had an effect.😀
Goodnight,
TOILETPAPERROLLS
Dorkus,
"Inductive grid stoppers are however less common, especially silver wired ones.
That is why we decided to offer air core silver inductors that are to be used as inductive grid stoppers.
We use air core to avoid distorsions that appear with ferrite beads.
The inductance value is in the mHy range and the DCR about 35 Ohms.
These grid stoppers really make a big difference when used with high quality tube equipment:
low pass for HF protection of input tubes or power tubes
damping of oscillations
tremendous increase in resolution of musical signals
2.5 uHy/ 35 Ohms DCR"
Data from their site.
Cheers,😉
Dorkus,
"Inductive grid stoppers are however less common, especially silver wired ones.
That is why we decided to offer air core silver inductors that are to be used as inductive grid stoppers.
We use air core to avoid distorsions that appear with ferrite beads.
The inductance value is in the mHy range and the DCR about 35 Ohms.
These grid stoppers really make a big difference when used with high quality tube equipment:
low pass for HF protection of input tubes or power tubes
damping of oscillations
tremendous increase in resolution of musical signals
2.5 uHy/ 35 Ohms DCR"
Data from their site.
Cheers,😉
Re: Angela's Tantallums
Hi PhopsonNY! A long time since we chat!
I've never really liked Holco, even when they where non-magnetic. The kind of tin and in the same time, slightly warm doesn't really made it to me. Add the fact the body is not rugged, I put them appart.
The actual state of digital recording on commercial disk call for a bit of warming of the sound, in most system. What I want to know, is what type of Dale resistor that LAMM use. Anybody knows? 'Cause the standard brown RN serie sucks. No wonder, after two unsuccesfull project, I tried, in a flash, to pass a magnet over the bunch. No surprise, they are magnetic. The vitreanous blue one are less magnetic and less harsh too.
Yes, they are better. Steve Eddy have brought up a another Tatalum option you may try first.
I see many post here about Corning Tatalum. Are they in current production or NOS?
Regards,
Daniel Trudeau
PhopsonNY said:
I remember your recommendation, but I didn't realize that Partsconnexion's Holcos were magnetic.
Hi PhopsonNY! A long time since we chat!
I've never really liked Holco, even when they where non-magnetic. The kind of tin and in the same time, slightly warm doesn't really made it to me. Add the fact the body is not rugged, I put them appart.
The actual state of digital recording on commercial disk call for a bit of warming of the sound, in most system. What I want to know, is what type of Dale resistor that LAMM use. Anybody knows? 'Cause the standard brown RN serie sucks. No wonder, after two unsuccesfull project, I tried, in a flash, to pass a magnet over the bunch. No surprise, they are magnetic. The vitreanous blue one are less magnetic and less harsh too.
Yes, they are better. Steve Eddy have brought up a another Tatalum option you may try first.
I see many post here about Corning Tatalum. Are they in current production or NOS?
Regards,
Daniel Trudeau
Grid stopers
"damping of oscillations.......The inductance value is in the mHy range and the DCR about 35 Ohms."
Hmmm a capacitive input in series with a large inductor
....... Hey wait a minute here!
Good one, you had me going for about 5 seconds. Maybe this is the new physics to go along with the new math I hear so much about......
And I'm the practical joker of the forum?
Grid stoppers indeed,
post-HH
"damping of oscillations.......The inductance value is in the mHy range and the DCR about 35 Ohms."
Hmmm a capacitive input in series with a large inductor
....... Hey wait a minute here!Good one, you had me going for about 5 seconds. Maybe this is the new physics to go along with the new math I hear so much about......
And I'm the practical joker of the forum?
Grid stoppers indeed,
post-HH
Re: Grid stopers
Not new physics. Just bad use of terminology.
They don't damp oscillation so much as prevent oscillation.
The purpose of the grid stopper is to form a low pass filter to keep ultrasonic interference out of the input and prevent the circuit from going unstable and oscillating.
Using resistive grid stoppers (which work in conjunction with the grid capacitance) requires higher values of resistance to bring down the cutoff point of the resulting RC filter but that added series resistance also attenuates the audio band signal you want to preserve.
The inductive grid stopper results in a steeper second order rolloff but has a DC resistance and inductance low enough that it has minimal effect at audio frequencies.
Also, that 35 ohms of DC resistance will assure that the resulting low pass filter function will be well damped. Overdamped even. Which means there will be no resonant peaks near the cutoff point.
So while they didn't phrase their claims too well, the physics behind it are sound.
se
Fred Dieckmann said:"damping of oscillations.......The inductance value is in the mHy range and the DCR about 35 Ohms."
Hmmm a capacitive input in series with a large inductor
Good one, you had me going for about 5 seconds. Maybe this is the new physics to go along with the new math I hear so much about......
Not new physics. Just bad use of terminology.
They don't damp oscillation so much as prevent oscillation.
The purpose of the grid stopper is to form a low pass filter to keep ultrasonic interference out of the input and prevent the circuit from going unstable and oscillating.
Using resistive grid stoppers (which work in conjunction with the grid capacitance) requires higher values of resistance to bring down the cutoff point of the resulting RC filter but that added series resistance also attenuates the audio band signal you want to preserve.
The inductive grid stopper results in a steeper second order rolloff but has a DC resistance and inductance low enough that it has minimal effect at audio frequencies.
Also, that 35 ohms of DC resistance will assure that the resulting low pass filter function will be well damped. Overdamped even. Which means there will be no resonant peaks near the cutoff point.
So while they didn't phrase their claims too well, the physics behind it are sound.
se
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