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Old 15th February 2013, 01:52 PM   #41
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Congratulations all pics seems originals
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Old 15th February 2013, 04:48 PM   #42
Rob41 is offline Rob41  United States
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Quote:
Originally Posted by merlin el mago View Post
Congratulations all pics seems originals
I'm grateful for the education here. Even with all the differences pointed out by valve, you believe they are all originals?

Have you ever seen a BG you didn't believe was original?

I've seen very poor copies of caps that are obvious to anyone, but most good copies I've seen are indistinguishable externally. That's why I'm amazed you're able to determine they are in fact originals.

You my friend, possess powers far beyond my own.
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Old 15th February 2013, 05:08 PM   #43
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I think analog_sa summed it up when he pointed out that the only sure way of finding out if they're genuine or not is to listen to them or cut them up.

merlin el mago, I'll let you know when I'm selling!!!!
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Old 15th February 2013, 05:33 PM   #44
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Quote:
Originally Posted by valve5425 View Post
I think analog_sa summed it up when he pointed out that the only sure way of finding out if they're genuine or not is to listen to them or cut them up.

merlin el mago, I'll let you know when I'm selling!!!!
I agree....and good plan.
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Old 15th February 2013, 05:38 PM   #45
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Quote:
Originally Posted by Rob41 View Post
I'm grateful for the education here. Even with all the differences pointed out by valve, you believe they are all originals?

Have you ever seen a BG you didn't believe was original?

I've seen very poor copies of caps that are obvious to anyone, but most good copies I've seen are indistinguishable externally. That's why I'm amazed you're able to determine they are in fact originals.

You my friend, possess powers far beyond my own.
You must read between lines, my afirmation is only looks originals. I doubt you have had and ear at some time a black gate
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Old 15th February 2013, 05:39 PM   #46
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anyone know the ESR impedance of these caps ?
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Old 15th February 2013, 05:42 PM   #47
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Quote:
Originally Posted by tinitus View Post
anyone know the ESR impedance of these caps ?
Some info here:

http://www.octave-electronics.com/Parts/cap/bg_tech.shtml

http://www.partsconnexion.com/t/reso...ackgate113.pdf

http://www.audiotuning.de/english/in...gate-tech.html

http://www.partsconnexion.com/t/reso...ckgate051a.pdf

Last edited by merlin el mago; 15th February 2013 at 05:47 PM.
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Old 15th February 2013, 05:48 PM   #48
tinitus is offline tinitus  Europe
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Quote:
Originally Posted by valve5425 View Post
Different case size for same value, 220uf 100v standard? Anybody else found this? Seems a little suspect to me!
different can size for the same type, and value ?.. yes, that does seem weird, and suspect

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Originally Posted by valve5425 View Post
..... so are the Tufnol ones genuine?
I have 220uf/100V with tufnol ends

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Originally Posted by valve5425 View Post
Not sure if this info is of use to anyone but if people can have a look at their own stock, which they know to be genuine, then maybe it will help in a small way to identifying any possible fakes out there!
dont know about the cap type letter
I only have standard type, and none them are marked with type letter
but all the more expencive special types seem to be
and on that point a few of them might need a closer study
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Old 15th February 2013, 06:05 PM   #49
tinitus is offline tinitus  Europe
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Quote:
Originally Posted by merlin el mago View Post
Some info here:
[/URL]
appears they claim to have smaller can size than usual

maybe it all really does come from the early and first efforts to devellop smaller lytic caps

looks more like proto type documentation
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Old 15th February 2013, 07:50 PM   #50
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The uncertainty of it all is why I'm more comfortable buying high quality current caps.
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