I thought it was a myth...

[Andrew Eckhardt]

A lot of large can caps are available in short-fat/ or tall-skinny arrangements.

[AC439]

You guys rocks !!!!! Please forgive my lack of knowledge about the "M" and Panasonic. I simply didn't know !

So, is this an OK to use cap for power supply filtering ? When I paired it with my ELNA, the sound of the amp turns bad so I'd assume this is probably a general purpose grade cap (not for audio or hifi). Also, the size is small and I think the ripple current is small therefore affecting the ESR (higher ESR) ??

I just re-read the datesheet and google this series of panasonic caps and they are being praised !

I think I want to try just using these caps in place of the ELNA and see what happens. Maybe they don't like to co-exist with each other.....

Opinion please !!

-AC

[Andrew Eckhardt]

If you're saying that you wound up at one point with two of these in parallel with the elnas and that is what boogered the sound, I'd reevaluate, Check wiring, etc. Even if they were output coupling it's an unexpected result.

[AC439]

Yes, I did try pair these with the ELNAs directly and also tired with a 1R as a C-R-C filter. Both configuration degraded the sound. The JLH has a very specific magic to me. When the caps were paired, the magic was gone and the amp sounded lifeless.

The other thing I have been thinking is :- Do capacitors need to be broken in ? (there are yea and nay sayers on internet about this)

If the date code on those caps are a little old, then maybe the caps needed to be put on circuit for broken in ?

[SoNic_real_one]

Of course an old electrolytic capacitor needs to stay under voltage for a while to regain complete capacity. The isolation quality is maintained by internal electro-chemistry, hence their name.

[Andrew Eckhardt]

None of it is impossible.

[Andersonix]

Originally Posted by mctavish

The printing on those Panasonic caps looks a bit suspect to me....

Agree! That M logo is obviously a fake, and we are helping them make better fakes by pointing this out!
(I am holding a genuine Panasonic from D-K in my hand....)

[AC439]

I googled again for pictures of the HA caps. I can't find the exact one I have but most pics there came from digikey. I also suspect the M logo. It seems a little blurr to me. But I read other threads about fake transistors and the fake ones have better print so go figure. There are some pics from digikey also shows blurry M logo too.

As for as the date code is concerned, it is only four digits on my batch but from the internet, the date code seems to be six digits. But again, I can't find the exact picture. Also, from the batch of caps I bought, there are some with 9448 as date code.

Do I have real caps ? or fake ones ?

[tubelab.com]

I am holding a genuine Panasonic from D-K in my hand....

There are several hundred in this room. The picture here shows 5 genuine Panasonic caps, all purchased from Digikey.

[tubelab.com]

Also, from the batch of caps I bought, there are some with 9448 as date code

I have seen real Panasonics with a 4, 5 or 6 digit date code. The old ones have 4 digits. I have about 50 of the 450 volt 150 uF caps from 2010, they have 5 digits. Some of the very recent caps have 6 digits. The gold label CEFM's have a red date stamp on the side, its not part of the printing. All were purchased from Digikey.

I have a few hundred 47 uF 250 V "Panasonic" TSNH's that I bought from All Electronics for 20 cents each. They do look different from all the rest, much thinner line width, and razor sharp printing. They also have the red date stamp. I bought a few abused them heavilly in the power supplies of guitar amps, none failed, and all worked good, so I bought more. Are they Real? I dont know, or really care. They work.