Author Topic: Power Resistors  (Read 14491 times)

Offline steve

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Power Resistors
« on: October 01, 2024, 08:06:49 PM »
When it comes to designs, say in cathode biased outputs, bypassing the power resistors
with good bypass capacitors does not alleviate the sonic effects that the power resistors
often cause.

I have found the Mills MRA resistors to be sonically exceptional. With that said, there is also an
MRB version. There is a physical difference.

1. The MRB incorporates a steel end cap where as
2. the MRA uses a "copper" end cap.
3. Both use copper leads

I have not compared the two for sonic differences, but wish that all become aware of the physical
differences. Material differences normally cause sonic differences.

Hope this helps.

steve
« Last Edit: October 03, 2024, 09:17:48 PM by steve »
Steve Sammet (Owner, Electron Eng, SAS Audio Labs, Ret)
SAS "V" 39pf/m 6N copper ICs,
SAS Test Phono Stage
Acutex 320 STR Mov Iron Cart
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Offline Folsom

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Re: Power Resistors
« Reply #1 on: October 07, 2024, 12:32:51 PM »
What are the negative effects you experienced with some?

I am not opposed to sandcast trials because the inductance might actually be useful in a tube circuit, especially if you have multiple tubes. I think they are no cap?

Funny, the MRA is made by Vishay and was the one I wanted to look up, but I thought Mills was a different company - it is only in the crossover/electronics world from old catalogs.

Offline steve

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Re: Power Resistors
« Reply #2 on: November 25, 2024, 07:09:05 AM »
What are the negative effects you experienced with some?

I am not opposed to sandcast trials because the inductance might actually be useful in a tube circuit, especially if you have multiple tubes. I think they are no cap?

Funny, the MRA is made by Vishay and was the one I wanted to look up, but I thought Mills was a different company - it is only in the crossover/electronics world from old catalogs.

Sorry for the delay Folsom, been ill and deer struck my car.

Sand resistors are inductive, steel lead wires and element materials used, each affecting the sonics in
a different way, and depending upon the placement in the circuit.

What I have noticed most is that Mills MRA give a relaxed, natural sound when used in wide
bandwidth circuit designs. However, using designs with limited bandwidth, such as 12AX7/12AT7
etc tubes, may give sensation of lacking highs. This is very general opinion.

By the way, Mills MRAs affect sonics differently than Dayton non inductive power resistors. I prefer the
Mills MRAs, just sounds more natural/accurate.

Mills was purchased by Vishay some years ago. Vishay seems to have a monopoly on resistors these
days.

cheers

steve
« Last Edit: November 25, 2024, 07:24:12 AM by steve »
Steve Sammet (Owner, Electron Eng, SAS Audio Labs, Ret)
SAS "V" 39pf/m 6N copper ICs,
SAS Test Phono Stage
Acutex 320 STR Mov Iron Cart
SAS 11A Perfect Tube Preamp
SAS 25 W Ref Triode/UL Monoblocks
2 way Floor Standing Test Speakers

Offline Nick B

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Re: Power Resistors
« Reply #3 on: November 28, 2024, 10:36:19 AM »
Hi Steve,

Just curious if you've ever tried the Amtrans AMRG resistors? I have them in my Hattor Big preamp which sounds terrific

Nick
Orchard Starkrimson Ultra amp
Hattor Big preamp
JMR Voce Grande speakers
Holo Cyan2 dac
Holo Red streamer
Hapa Aero digital coax
WyWires Silver cables
TWL Digital American II p cord
Audio Envy p cords
Roon, Tidal, Qobuz
PI Audio UberBUSS

Offline steve

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Re: Power Resistors
« Reply #4 on: December 02, 2024, 02:39:15 PM »
Hi Steve,

Just curious if you've ever tried the Amtrans AMRG resistors? I have them in my Hattor Big preamp which sounds terrific

Nick

Hi Nick,

No, I have not heard of them. But then I have not been in the parts scene that much for a
decade or so. I just checked and they are carbon film, which I do not recommend.

But that is me personally. Even between the Mills and Dayton non-inductive resistors (heavily
bypassed) I could discern a sonic difference in the output stage.

Cheers

steve
Steve Sammet (Owner, Electron Eng, SAS Audio Labs, Ret)
SAS "V" 39pf/m 6N copper ICs,
SAS Test Phono Stage
Acutex 320 STR Mov Iron Cart
SAS 11A Perfect Tube Preamp
SAS 25 W Ref Triode/UL Monoblocks
2 way Floor Standing Test Speakers

Offline Nick B

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Re: Power Resistors
« Reply #5 on: December 03, 2024, 05:47:56 PM »
Hi Steve,

Just curious if you've ever tried the Amtrans AMRG resistors? I have them in my Hattor Big preamp which sounds terrific

Nick

Hi Nick,

No, I have not heard of them. But then I have not been in the parts scene that much for a
decade or so. I just checked and they are carbon film, which I do not recommend.

But that is me personally. Even between the Mills and Dayton non-inductive resistors (heavily
bypassed) I could discern a sonic difference in the output stage.

Cheers

steve

I appreciate your thoughts, Steve. I don't know much about resistors other than the usual well regarded ones. These AMRG resistors in my Hattor preamp are the priciest upgrade and it is such a wonderful sounding preamp. I may soon try the new Hattor 6ns7 tube buffer as a result. 
Nick
Orchard Starkrimson Ultra amp
Hattor Big preamp
JMR Voce Grande speakers
Holo Cyan2 dac
Holo Red streamer
Hapa Aero digital coax
WyWires Silver cables
TWL Digital American II p cord
Audio Envy p cords
Roon, Tidal, Qobuz
PI Audio UberBUSS

Offline steve

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Re: Power Resistors
« Reply #6 on: December 05, 2024, 06:11:34 PM »
Hi Steve,

Just curious if you've ever tried the Amtrans AMRG resistors? I have them in my Hattor Big preamp which sounds terrific

Nick


Hi Nick,

No, I have not heard of them. But then I have not been in the parts scene that much for a
decade or so. I just checked and they are carbon film, which I do not recommend.

But that is me personally. Even between the Mills and Dayton non-inductive resistors (heavily
bypassed) I could discern a sonic difference in the output stage.

Cheers

steve

I appreciate your thoughts, Steve. I don't know much about resistors other than the usual well regarded ones. These AMRG resistors in my Hattor preamp are the priciest upgrade and it is such a wonderful sounding preamp. I may soon try the new Hattor 6ns7 tube buffer as a result. 
Nick

Good luck with the new preamplifier Nick. What would be interesting is to have 4 preamps, each
with the different resistor types to compare sonics. :)

cheers and all the best

steve
« Last Edit: December 05, 2024, 06:13:47 PM by steve »
Steve Sammet (Owner, Electron Eng, SAS Audio Labs, Ret)
SAS "V" 39pf/m 6N copper ICs,
SAS Test Phono Stage
Acutex 320 STR Mov Iron Cart
SAS 11A Perfect Tube Preamp
SAS 25 W Ref Triode/UL Monoblocks
2 way Floor Standing Test Speakers

Offline Nick B

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Re: Power Resistors
« Reply #7 on: December 05, 2024, 07:20:42 PM »
Hi Steve,

Just curious if you've ever tried the Amtrans AMRG resistors? I have them in my Hattor Big preamp which sounds terrific

Nick


Hi Nick,

No, I have not heard of them. But then I have not been in the parts scene that much for a
decade or so. I just checked and they are carbon film, which I do not recommend.

But that is me personally. Even between the Mills and Dayton non-inductive resistors (heavily
bypassed) I could discern a sonic difference in the output stage.

Cheers

steve

I appreciate your thoughts, Steve. I don't know much about resistors other than the usual well regarded ones. These AMRG resistors in my Hattor preamp are the priciest upgrade and it is such a wonderful sounding preamp. I may soon try the new Hattor 6ns7 tube buffer as a result. 
Nick

Good luck with the new preamplifier Nick. What would be interesting is to have 4 preamps, each
with the different resistor types to compare sonics. :)

cheers and all the best

steve

An interesting experiment that would be, Steve, although a bit on the expensive side side! I will let you know if I get that Hattor tube buffer.
Orchard Starkrimson Ultra amp
Hattor Big preamp
JMR Voce Grande speakers
Holo Cyan2 dac
Holo Red streamer
Hapa Aero digital coax
WyWires Silver cables
TWL Digital American II p cord
Audio Envy p cords
Roon, Tidal, Qobuz
PI Audio UberBUSS

Offline steve

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Re: Power Resistors
« Reply #8 on: December 21, 2024, 05:32:47 PM »
Hi Steve,

Just curious if you've ever tried the Amtrans AMRG resistors? I have them in my Hattor Big preamp which sounds terrific

Nick


Hi Nick,

No, I have not heard of them. But then I have not been in the parts scene that much for a
decade or so. I just checked and they are carbon film, which I do not recommend.

But that is me personally. Even between the Mills and Dayton non-inductive resistors (heavily
bypassed) I could discern a sonic difference in the output stage.

Cheers

steve

I appreciate your thoughts, Steve. I don't know much about resistors other than the usual well regarded ones. These AMRG resistors in my Hattor preamp are the priciest upgrade and it is such a wonderful sounding preamp. I may soon try the new Hattor 6ns7 tube buffer as a result. 
Nick

Good luck with the new preamplifier Nick. What would be interesting is to have 4 preamps, each
with the different resistor types to compare sonics. :)

cheers and all the best

steve

An interesting experiment that would be, Steve, although a bit on the expensive side side! I will let you know if I get that Hattor tube buffer.

Sounds good Nick.

Cheers

steve
Steve Sammet (Owner, Electron Eng, SAS Audio Labs, Ret)
SAS "V" 39pf/m 6N copper ICs,
SAS Test Phono Stage
Acutex 320 STR Mov Iron Cart
SAS 11A Perfect Tube Preamp
SAS 25 W Ref Triode/UL Monoblocks
2 way Floor Standing Test Speakers

Offline Nick B

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Re: Power Resistors
« Reply #9 on: December 22, 2024, 11:44:25 PM »
Hi Steve,

Just curious if you've ever tried the Amtrans AMRG resistors? I have them in my Hattor Big preamp which sounds terrific

Nick


Hi Nick,

No, I have not heard of them. But then I have not been in the parts scene that much for a
decade or so. I just checked and they are carbon film, which I do not recommend.

But that is me personally. Even between the Mills and Dayton non-inductive resistors (heavily
bypassed) I could discern a sonic difference in the output stage.

Cheers

steve

I appreciate your thoughts, Steve. I don't know much about resistors other than the usual well regarded ones. These AMRG resistors in my Hattor preamp are the priciest upgrade and it is such a wonderful sounding preamp. I may soon try the new Hattor 6ns7 tube buffer as a result. 
Nick

Good luck with the new preamplifier Nick. What would be interesting is to have 4 preamps, each
with the different resistor types to compare sonics. :)

cheers and all the best

steve

An interesting experiment that would be, Steve, although a bit on the expensive side side! I will let you know if I get that Hattor tube buffer.

Sounds good Nick.

Cheers

steve

Hi Steve,

Santa provided a very unexpected and early gift. So it is with 95% -/+ certainty that I'll be ordering that Hattor 6ns7 buffer. As to tubes, maybe the new Ray Reserve line.

Nick
Orchard Starkrimson Ultra amp
Hattor Big preamp
JMR Voce Grande speakers
Holo Cyan2 dac
Holo Red streamer
Hapa Aero digital coax
WyWires Silver cables
TWL Digital American II p cord
Audio Envy p cords
Roon, Tidal, Qobuz
PI Audio UberBUSS

Offline steve

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Re: Power Resistors
« Reply #10 on: December 27, 2024, 12:37:56 PM »
Hi Steve,

Just curious if you've ever tried the Amtrans AMRG resistors? I have them in my Hattor Big preamp which sounds terrific

Nick


Hi Nick,

No, I have not heard of them. But then I have not been in the parts scene that much for a
decade or so. I just checked and they are carbon film, which I do not recommend.

But that is me personally. Even between the Mills and Dayton non-inductive resistors (heavily
bypassed) I could discern a sonic difference in the output stage.

Cheers

steve

I appreciate your thoughts, Steve. I don't know much about resistors other than the usual well regarded ones. These AMRG resistors in my Hattor preamp are the priciest upgrade and it is such a wonderful sounding preamp. I may soon try the new Hattor 6ns7 tube buffer as a result. 
Nick

Good luck with the new preamplifier Nick. What would be interesting is to have 4 preamps, each
with the different resistor types to compare sonics. :)

cheers and all the best

steve

An interesting experiment that would be, Steve, although a bit on the expensive side side! I will let you know if I get that Hattor tube buffer.

Sounds good Nick.

Cheers

steve

Hi Steve,

Santa provided a very unexpected and early gift. So it is with 95% -/+ certainty that I'll be ordering that Hattor 6ns7 buffer. As to tubes, maybe the new Ray Reserve line.

Nick


Sounds interesting Nick. Can I look for an evaluation/review, either after breakin, or along the way?

cheers

steve
Steve Sammet (Owner, Electron Eng, SAS Audio Labs, Ret)
SAS "V" 39pf/m 6N copper ICs,
SAS Test Phono Stage
Acutex 320 STR Mov Iron Cart
SAS 11A Perfect Tube Preamp
SAS 25 W Ref Triode/UL Monoblocks
2 way Floor Standing Test Speakers

Offline Nick B

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Re: Power Resistors
« Reply #11 on: December 27, 2024, 04:43:19 PM »
Hi Steve,

Just curious if you've ever tried the Amtrans AMRG resistors? I have them in my Hattor Big preamp which sounds terrific

Nick


Hi Nick,

No, I have not heard of them. But then I have not been in the parts scene that much for a
decade or so. I just checked and they are carbon film, which I do not recommend.

But that is me personally. Even between the Mills and Dayton non-inductive resistors (heavily
bypassed) I could discern a sonic difference in the output stage.

Cheers

steve

I appreciate your thoughts, Steve. I don't know much about resistors other than the usual well regarded ones. These AMRG resistors in my Hattor preamp are the priciest upgrade and it is such a wonderful sounding preamp. I may soon try the new Hattor 6ns7 tube buffer as a result. 
Nick

Good luck with the new preamplifier Nick. What would be interesting is to have 4 preamps, each
with the different resistor types to compare sonics. :)

cheers and all the best

steve

An interesting experiment that would be, Steve, although a bit on the expensive side side! I will let you know if I get that Hattor tube buffer.

Sounds good Nick.

Cheers

steve

Hi Steve,

Santa provided a very unexpected and early gift. So it is with 95% -/+ certainty that I'll be ordering that Hattor 6ns7 buffer. As to tubes, maybe the new Ray Reserve line.

Nick


Sounds interesting Nick. Can I look for an evaluation/review, either after breakin, or along the way?

cheers

steve


Yes, Steve. I am about to order the 6ns7 buffer. The Hattor Big solid state preamp is so outstanding that the new version tube buffer is certainly worth taking a chance on.
I guess owner/designer Arek Kallas is a low key guy and doesn't really promote his products. He did ask me to write a review on the Hattor Big and I did. I'm so glad to have owned the Supratek Chardonnay 6ns7 preamp and now the Hattor/Khozmo line.

Nick
« Last Edit: December 27, 2024, 06:05:44 PM by Nick B »
Orchard Starkrimson Ultra amp
Hattor Big preamp
JMR Voce Grande speakers
Holo Cyan2 dac
Holo Red streamer
Hapa Aero digital coax
WyWires Silver cables
TWL Digital American II p cord
Audio Envy p cords
Roon, Tidal, Qobuz
PI Audio UberBUSS

Offline steve

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Re: Power Resistors
« Reply #12 on: December 30, 2024, 01:02:44 PM »
Hi Steve,

Just curious if you've ever tried the Amtrans AMRG resistors? I have them in my Hattor Big preamp which sounds terrific

Nick


Hi Nick,

No, I have not heard of them. But then I have not been in the parts scene that much for a
decade or so. I just checked and they are carbon film, which I do not recommend.

But that is me personally. Even between the Mills and Dayton non-inductive resistors (heavily
bypassed) I could discern a sonic difference in the output stage.

Cheers

steve

I appreciate your thoughts, Steve. I don't know much about resistors other than the usual well regarded ones. These AMRG resistors in my Hattor preamp are the priciest upgrade and it is such a wonderful sounding preamp. I may soon try the new Hattor 6ns7 tube buffer as a result. 
Nick

Good luck with the new preamplifier Nick. What would be interesting is to have 4 preamps, each
with the different resistor types to compare sonics. :)

cheers and all the best

steve

An interesting experiment that would be, Steve, although a bit on the expensive side side! I will let you know if I get that Hattor tube buffer.

Sounds good Nick.

Cheers

steve

Hi Steve,

Santa provided a very unexpected and early gift. So it is with 95% -/+ certainty that I'll be ordering that Hattor 6ns7 buffer. As to tubes, maybe the new Ray Reserve line.

Nick


Sounds interesting Nick. Can I look for an evaluation/review, either after breakin, or along the way?

cheers

steve


Yes, Steve. I am about to order the 6ns7 buffer. The Hattor Big solid state preamp is so outstanding that the new version tube buffer is certainly worth taking a chance on.
I guess owner/designer Arek Kallas is a low key guy and doesn't really promote his products. He did ask me to write a review on the Hattor Big and I did. I'm so glad to have owned the Supratek Chardonnay 6ns7 preamp and now the Hattor/Khozmo line.

Nick

No. 5 needs more input, more input.   :D
Steve Sammet (Owner, Electron Eng, SAS Audio Labs, Ret)
SAS "V" 39pf/m 6N copper ICs,
SAS Test Phono Stage
Acutex 320 STR Mov Iron Cart
SAS 11A Perfect Tube Preamp
SAS 25 W Ref Triode/UL Monoblocks
2 way Floor Standing Test Speakers

Offline Nick B

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  • Posts: 4255
Re: Power Resistors
« Reply #13 on: December 31, 2024, 11:36:32 PM »
Hi Steve,

Just curious if you've ever tried the Amtrans AMRG resistors? I have them in my Hattor Big preamp which sounds terrific

Nick


Hi Nick,

No, I have not heard of them. But then I have not been in the parts scene that much for a
decade or so. I just checked and they are carbon film, which I do not recommend.

But that is me personally. Even between the Mills and Dayton non-inductive resistors (heavily
bypassed) I could discern a sonic difference in the output stage.

Cheers

steve

I appreciate your thoughts, Steve. I don't know much about resistors other than the usual well regarded ones. These AMRG resistors in my Hattor preamp are the priciest upgrade and it is such a wonderful sounding preamp. I may soon try the new Hattor 6ns7 tube buffer as a result. 
Nick

Good luck with the new preamplifier Nick. What would be interesting is to have 4 preamps, each
with the different resistor types to compare sonics. :)

cheers and all the best

steve

An interesting experiment that would be, Steve, although a bit on the expensive side side! I will let you know if I get that Hattor tube buffer.

Sounds good Nick.

Cheers

steve

Hi Steve,

Santa provided a very unexpected and early gift. So it is with 95% -/+ certainty that I'll be ordering that Hattor 6ns7 buffer. As to tubes, maybe the new Ray Reserve line.

Nick


Sounds interesting Nick. Can I look for an evaluation/review, either after breakin, or along the way?

cheers

steve


Yes, Steve. I am about to order the 6ns7 buffer. The Hattor Big solid state preamp is so outstanding that the new version tube buffer is certainly worth taking a chance on.
I guess owner/designer Arek Kallas is a low key guy and doesn't really promote his products. He did ask me to write a review on the Hattor Big and I did. I'm so glad to have owned the Supratek Chardonnay 6ns7 preamp and now the Hattor/Khozmo line.

Nick

No. 5 needs more input, more input.   :D

Not clear what you meant. Can you restate?
Orchard Starkrimson Ultra amp
Hattor Big preamp
JMR Voce Grande speakers
Holo Cyan2 dac
Holo Red streamer
Hapa Aero digital coax
WyWires Silver cables
TWL Digital American II p cord
Audio Envy p cords
Roon, Tidal, Qobuz
PI Audio UberBUSS

Offline steve

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Re: Power Resistors
« Reply #14 on: January 01, 2025, 08:54:09 PM »
Hi Steve,

Just curious if you've ever tried the Amtrans AMRG resistors? I have them in my Hattor Big preamp which sounds terrific

Nick


Hi Nick,

No, I have not heard of them. But then I have not been in the parts scene that much for a
decade or so. I just checked and they are carbon film, which I do not recommend.

But that is me personally. Even between the Mills and Dayton non-inductive resistors (heavily
bypassed) I could discern a sonic difference in the output stage.

Cheers

steve

I appreciate your thoughts, Steve. I don't know much about resistors other than the usual well regarded ones. These AMRG resistors in my Hattor preamp are the priciest upgrade and it is such a wonderful sounding preamp. I may soon try the new Hattor 6ns7 tube buffer as a result. 
Nick

Good luck with the new preamplifier Nick. What would be interesting is to have 4 preamps, each
with the different resistor types to compare sonics. :)

cheers and all the best

steve

An interesting experiment that would be, Steve, although a bit on the expensive side side! I will let you know if I get that Hattor tube buffer.

Sounds good Nick.

Cheers

steve

Hi Steve,

Santa provided a very unexpected and early gift. So it is with 95% -/+ certainty that I'll be ordering that Hattor 6ns7 buffer. As to tubes, maybe the new Ray Reserve line.

Nick


Sounds interesting Nick. Can I look for an evaluation/review, either after breakin, or along the way?

cheers

steve


Yes, Steve. I am about to order the 6ns7 buffer. The Hattor Big solid state preamp is so outstanding that the new version tube buffer is certainly worth taking a chance on.
I guess owner/designer Arek Kallas is a low key guy and doesn't really promote his products. He did ask me to write a review on the Hattor Big and I did. I'm so glad to have owned the Supratek Chardonnay 6ns7 preamp and now the Hattor/Khozmo line.

Nick

No. 5 needs more input, more input.   :D

Not clear what you meant. Can you restate?

No. 5 is a robot from the movie Short Circuit. No. 5 claims to be alive after an incident. No. 5 arrives at this
lady's house and reads every piece of literature and watches tv all night, including the three stooges.
He constantly says, need more input, more input. Really an entertaining and futuristic movie.

Just my weird sense of humor.

cheers

steve
Steve Sammet (Owner, Electron Eng, SAS Audio Labs, Ret)
SAS "V" 39pf/m 6N copper ICs,
SAS Test Phono Stage
Acutex 320 STR Mov Iron Cart
SAS 11A Perfect Tube Preamp
SAS 25 W Ref Triode/UL Monoblocks
2 way Floor Standing Test Speakers