Wanted: Pair of Copper Foil Capacitors

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JohnG
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Wanted: Pair of Copper Foil Capacitors

Post by JohnG » Sun Oct 06, 2019 9:49 am

I'm looking to Trial a Copper Foil Capacitor on a circuit.
It can be from 0.47uf - 1.5uf 400V or above.
As it is for a trial, the Cap's can have lot of use under their belt.
What have you ?
If a pair can be loaned, I will be more than Happy to pay return postage and Buy a Pint for anybody who offers a help.

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Re: Wanted: Pair of Copper Foil Capacitors

Post by JohnG » Fri Oct 25, 2019 1:38 pm

There must be somebody out there with a Pair of Copper Caps they have fell put of love with.

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Re: Wanted: Pair of Copper Foil Capacitors

Post by IslandPink » Fri Oct 25, 2019 2:27 pm

I suspect most of us out here are sitting happily on our stashes of copper foil caps !
Having said that I did have some Audyn blue ones around 0.47u or 0.68u that I felt were not quite as transparent as the Mundorf Zinc ones. Let me have a look later this afternoon.
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Re: Wanted: Pair of Copper Foil Capacitors

Post by IslandPink » Fri Oct 25, 2019 2:56 pm

Of course I can find ONE. This has been a feature of anything I went looking for, recently.
0.68u/630v Audyn True copper.
Bear with me, the other one ought to be somewhere and I don't think it's in the main system currently.
"The bass is the king of the instruments - it has no known natural predator" (Wobble)

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Re: Wanted: Pair of Copper Foil Capacitors

Post by JohnG » Fri Oct 25, 2019 3:19 pm

Good'o, :cheers: I will sit tight awaiting the outcome of the search.

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Re: Wanted: Pair of Copper Foil Capacitors

Post by IslandPink » Fri Oct 25, 2019 5:29 pm

OK, I was wrong, it was in the main system ... however only making up a value on the tweeter crossover until I got the right Mundorf cap - which I now have - so I have released this one and put the other 2.7uF cap in there.
PM me with your address, maybe I can get them in the post tomorrow.
"The bass is the king of the instruments - it has no known natural predator" (Wobble)

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Re: Wanted: Pair of Copper Foil Capacitors

Post by Paul Barker » Fri Oct 25, 2019 9:58 pm

Can I just say I want a few pairs too... in case anyone’s giving them away.
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Re: Wanted: Pair of Copper Foil Capacitors

Post by JohnG » Sat Oct 26, 2019 2:06 pm

Hello Islandpink
I have been trying to contact you to arrange a Payment :thumbleft:
Can you let me know if you have my latest mails.

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Re: Wanted: Pair of Copper Foil Capacitors

Post by IslandPink » Sat Oct 26, 2019 3:25 pm

Just caught up with you now, John. See PM.
Paul Barker wrote:
Fri Oct 25, 2019 9:58 pm
Can I just say I want a few pairs too... in case anyone’s giving them away.
It won't be me :D
"The bass is the king of the instruments - it has no known natural predator" (Wobble)

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Re: Wanted: Pair of Copper Foil Capacitors

Post by pre65 » Sat Oct 26, 2019 4:09 pm

Paul Barker wrote:
Fri Oct 25, 2019 9:58 pm
Can I just say I want a few pairs too... in case anyone’s giving them away.
If they are anything like the Audionote ones that Nick took out of my Audionote copy pre amp then good luck to you. :(
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Nick
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Re: Wanted: Pair of Copper Foil Capacitors

Post by Nick » Sat Oct 26, 2019 6:58 pm

They would be ok as long as the following resistor was small enough to stop the leakage building up a voltage.
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Re: Wanted: Pair of Copper Foil Capacitors

Post by IslandPink » Sat Oct 26, 2019 8:03 pm

If I have one of my Jensen copper out of the circuit I'll check those for resistance, out of interest. However I've never noticed anything untoward with those. Audio Note had earlier problems with leakage of oil from their caps, didn't they ?
"The bass is the king of the instruments - it has no known natural predator" (Wobble)

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Re: Wanted: Pair of Copper Foil Capacitors

Post by JohnG » Sat Oct 26, 2019 8:28 pm

With the Audyns now on the way to me, there will be three brands to assess in a device being produced, 0.47, 0.68 and 1.0uf.
Even though 1.0 is the preferred value, it will be interestig to assess the Sonic Signature of the Brands.
Any observations that others have picked up on different brands Copper Foils as for their influence on a SQ will be of interest, if it is shared.

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Re: Wanted: Pair of Copper Foil Capacitors

Post by Ray P » Mon Oct 28, 2019 10:09 pm

JohnG wrote:
Sat Oct 26, 2019 8:28 pm
it will be interestig to assess the Sonic Signature of the Brands.
But if each brand is a different value it won't really be a truly meaningful comparison as the different values will change the operating point of the circuit.

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Re: Wanted: Pair of Copper Foil Capacitors

Post by IslandPink » Mon Oct 28, 2019 10:29 pm

Copper foil caps are typically only of a value suitable for coupling caps, so they won't change the operating point of the driver or the output valve.
The value will affect the bass roll-off point, that needs to be borne in mind when listening.
"The bass is the king of the instruments - it has no known natural predator" (Wobble)

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