The ballast resistors in my amp are JDC MPR 0.68ohm 5W ones. Its by a Chinese company. I am thinking of replacing it with better ones
Do you think Jantzen or Mundoff 5W metal oxide are a good choice?
Btw, if I use 10W ones instead of 5W, will there be any issues?? Just thinking that higher rating means the resistor won't be that hot.
Do you think Jantzen or Mundoff 5W metal oxide are a good choice?
Btw, if I use 10W ones instead of 5W, will there be any issues?? Just thinking that higher rating means the resistor won't be that hot.
Why change a perfectly good resistor?
I think your choice is over priced and no better that standard 10% wire wound or Metal Oxide resistors.
Heat it heat, no matter what power rating to go up to.
The only way to dissipate heat is with a larger surface area. If it still works as it should, why mess it up.
I think your choice is over priced and no better that standard 10% wire wound or Metal Oxide resistors.
Heat it heat, no matter what power rating to go up to.
The only way to dissipate heat is with a larger surface area. If it still works as it should, why mess it up.
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Your boards are made for 5w size, 10w resistors will be twice the size, mostly length, and won't fit well.
WHat do you consider "better"? And what improvement do you expect? Of all the parts in the amp to replace, they are way down on my list, but that is just my opinion. I do agree with Jon, if the amp is working, why "fix" it?
WHat do you consider "better"? And what improvement do you expect? Of all the parts in the amp to replace, they are way down on my list, but that is just my opinion. I do agree with Jon, if the amp is working, why "fix" it?
Metal plate resistors are far superior to ruthenium oxide, that would be a downgrade. Basically metal film / foil / plate / wirewound are the top performers, metal oxide or carbon are worse.
Not that it matters much in that position as its inside the feedback loop.
But the first question are they genuine MPRs or fakes?
Thanks for the reply.
Regarding "better", I would say its brand and quality. Eg for capacitors, I am sure you would prefer brands like Nichicon, KEMET, Elna, Mundoff etc... compared to those like Capax, Teapo, Rscon...
For resistors, I believe brands like Vishay (esp. their Dale resistors) and ohmite etc.... would be preferred over chinese ones like JDC.
As for why "fix" it? ITs because I am recapping the amp. So, it would be easy to also replace the resistors at the same time.
You display a fascinating mix of faith and ignorance.
And what drov you to pick those brands?
eading too many "esoteric audio" pages?
That´s bad for your mental health.
Or simple thinking "higuer dissipation is better"?
In that case, whay not pick 100W ones?
20 times better than 5W
Why not 1000W ones?
Those you mention do not.
They do show hype, that´s for sure.
All ears waiting for solid proof for your claims, besides glowin reviews in mystery magazines.
Ok, replace them akll for famous grands.
Just remember to scratch the "Made in PRC" labels off.
Unless reseller (not manufacturer by any means) already did that for you 😉
WHERE do you think the "better" ones are made?
No, as explained above they are worse than the original ones.
And what drov you to pick those brands?
eading too many "esoteric audio" pages?
That´s bad for your mental health.
Is there a thermal problem you are trying to solve?
Or simple thinking "higuer dissipation is better"?
In that case, whay not pick 100W ones?
20 times better than 5W
Why not 1000W ones?
For brand to mean something, it must *consistently* have shown much better performance along years.
Those you mention do not.
They do show hype, that´s for sure.
Hype means nothing in the real world, demonstrated higher performance does.
All ears waiting for solid proof for your claims, besides glowin reviews in mystery magazines.
All are Chinese .
Ok, replace them akll for famous grands.
Just remember to scratch the "Made in PRC" labels off.
Unless reseller (not manufacturer by any means) already did that for you 😉
How about put me on your ignore list or something. I don't want to talk to you. Just ignore all my posts.
Thank you.
JMFahey speaks for the majority of engineer base on choice of components.
If your pocket needs emptying, why not donate to a charity at home?
I await your request for advice on the many man made faults that will appear on this and other sites.
If your pocket needs emptying, why not donate to a charity at home?
I await your request for advice on the many man made faults that will appear on this and other sites.
Nope, not falling into the trap....
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