Hi all,
Two years ago I started to build what I would call a PASS HPA1 clone. It's probably far from the original but I had pleasure mounting and testing it.
Those days it started to develop bad contacts on the output jack. Yesterday, a good friend of mine told me to have the same issue on the amp I built for him.
Both amps use a NEUTRIK NJ3FP6C on the headphone output. Mine has been ordered at MOUSER, july 2020.
https://eu.mouser.com/ProductDetail/Neutrik/NJ3FP6C?qs=43pPWqpsSNvGBmcCIIa3rg==
I dismounted it to have a look at the contacts quality. The ground one seems good, non oxydated thick metal silver covered.
It's another story for the tip and ring.
Dixit NEUTRIK, those contacts should be made of brass nickel covered. They're not.
What I see is a poor thin piece of unknown oxydated metal. The oxydation is brown in the middle of it and blue on the outer part.
With time, the spring effect disappears slowly and contact becomes loose.
Did someone else experience the same behaviour with those jacks ?
Two years ago I started to build what I would call a PASS HPA1 clone. It's probably far from the original but I had pleasure mounting and testing it.
Those days it started to develop bad contacts on the output jack. Yesterday, a good friend of mine told me to have the same issue on the amp I built for him.
Both amps use a NEUTRIK NJ3FP6C on the headphone output. Mine has been ordered at MOUSER, july 2020.
https://eu.mouser.com/ProductDetail/Neutrik/NJ3FP6C?qs=43pPWqpsSNvGBmcCIIa3rg==
I dismounted it to have a look at the contacts quality. The ground one seems good, non oxydated thick metal silver covered.
It's another story for the tip and ring.
Dixit NEUTRIK, those contacts should be made of brass nickel covered. They're not.
What I see is a poor thin piece of unknown oxydated metal. The oxydation is brown in the middle of it and blue on the outer part.
With time, the spring effect disappears slowly and contact becomes loose.
Did someone else experience the same behaviour with those jacks ?
I must correct myself on this one.
I made a totally wrong assumption in my previous post.
I forgot that I exchanged the silver looking jack on the picture with a black one to mate the cabinet.
The silver one has been bought at a french place (Selectronic) and is a complete knock off. It's this one I first dismantled.
Today I removed the black one bought at MOUSER and it's the real thing in perfect shape like described in the datasheet.
The bad contacts I experienced those days came from the headphone. It's jack is a native 3.5mm with a 6.35mm adaptator on it and it's this one wich became loose.
It's incredible how sometime you can be totally fooled by yourself !!!
Sorry NEUTRIK, your gear is TOP NOTCH.
Francis
I made a totally wrong assumption in my previous post.
I forgot that I exchanged the silver looking jack on the picture with a black one to mate the cabinet.
The silver one has been bought at a french place (Selectronic) and is a complete knock off. It's this one I first dismantled.
Today I removed the black one bought at MOUSER and it's the real thing in perfect shape like described in the datasheet.
The bad contacts I experienced those days came from the headphone. It's jack is a native 3.5mm with a 6.35mm adaptator on it and it's this one wich became loose.
It's incredible how sometime you can be totally fooled by yourself !!!
Sorry NEUTRIK, your gear is TOP NOTCH.
Francis
