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Old 10th June 2012, 05:28 PM   #1
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Default Help me to Identify this Tube

Hi all, I am new here.
I am a very new in tube amplifier, I bought car tube amplifier with 2 (two) 6N11 tube inside, the sound is very bright, then I bought at local store 2 Zaerix CCA-E88CC - Z&I Aero Services LTD London - England for USD.80/each, this is gold pin, the gold is not shine but look like heavily coat not shine gold .
My car sound is warm now, love it.
I understand that Zaerix is a military supplier for tube, they rebranded many tube, I was looking in internet for this tube information, but I didn't find one.

The store has 4 stocks last for this tubes/valves, is it worth to buy this tubes/valves at that price?

Anybody know what the origin manufacture of this tube/valve Zaerix CCA-E88CC ?

Thank in Advance,

Kesha
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Old 10th June 2012, 05:42 PM   #2
DF96 is offline DF96  England
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I believe Z&I were originally an avionics supplier. They rebranded valves from everywhere, but mainly Russian and East European. You could buy two valves from Z&I, and they could be from different makers so you won't find much on the internet about Z&I themselves.
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Old 10th June 2012, 06:00 PM   #3
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The open Anode construction, Reuleaux-Square Mica style and the way the glass is melted off at the top tell you that these are 100% eastern european 6N23P which are equivalent to ECC88.

Interesting that people use tubes for their car radio..:-)
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Old 10th June 2012, 06:28 PM   #4
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@DF96, it is true, thank you.

@The_Manta, thank you, but I find that 6N23P has silver PIN?
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Old 10th June 2012, 06:36 PM   #5
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@The Manta, yes, I love the tube sound for my car audio system, I really love the very warm, wet and look like carpet room effect from this Zaerix Tube.
The original 6N11 is very bright.
I wonder how the tube can do that like a magic, now I am thinking to get Telefunken, but they are expensive.
Btw, why the Zaerix wrote this valve as CCA ?
They want to fool people or something?

kesha
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Old 10th June 2012, 08:52 PM   #6
DF96 is offline DF96  England
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Valve rebranders can sometimes be 'flexible' in their labelling; if it has the same pinout and vaguely similar characteristics then it is fair game to be regarded as an 'equivalent' in their eyes. I once bought a set of 5 12AY7; two of them were 12AY7, the other three were actually 5965 (=12AV7?) but, hey, same pinout and similar mu.
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Old 10th June 2012, 11:16 PM   #7
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Quote:
Originally Posted by keshaandrea View Post
@The Manta, yes, I love the tube sound for my car audio system, I really love the very warm, wet and look like carpet room effect from this Zaerix Tube.
The original 6N11 is very bright.
I wonder how the tube can do that like a magic, now I am thinking to get Telefunken, but they are expensive.
Btw, why the Zaerix wrote this valve as CCA ?
They want to fool people or something?

kesha
No, the German governmental telecommunication office used its own designators for tubes. They didn't use new constructions but standad types like the ECC88. To ensure quality, they used special selected types directly from the factory which were labeld differently. This is how the Aa, Ba, F2a, CCa etc. were born. The CCa is a ECC88/E88CC used for wide band telecommunication equipment. Zearix simply "faked" that and labeld them also as CCa but with a Capital "A".
Here is a pic I made long ago with all the ECC88 stuff, but basically the same valve.
Click the image to open in full size.
When I did some listening tests long ago I couldn't hear a difference.
BTW: The tube on the right is russian 6N23P as yours, but relabeld by Richardson (=NATIONAL). That Company also did some scary sh*t like labeling a russian 6P3S as EL156 (http://www.proradioantic.ro/data/anu...1295735288.jpg) etc. Rebranded Tubes can be funny from time to time.
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Old 11th June 2012, 05:02 AM   #8
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@The Manta: How to explain the gold pin from the Zaerix, I see that 6N23P is metal pin?
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Old 11th June 2012, 12:18 PM   #9
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Probably galvanic plating afterwards. Generally, one didn't use golden Pins in the manufacturing process of a tube because gold doesn't bond to silicon dioxide glass very well. (Glass-to-metal seal - Wikipedia, the free encyclopedia)
Western Countries used a chromium-iron alloy for the pins whereas russians used nickel (shiny bright pins).
I don't really care for gold pins. If you swap a tube a few times, the extremely thin gold coating will come off pretty fast. Especially when you use sockets with bifurcated contacts. Since "tube rolling" is becoming a new sub-culture it should be noted, that gold pin tubes weren't used for swapping around. The were put in once and had to last a long time. I posted an example of an antenna amplifier here: 6922, a 6DJ8 replacement??

The "magic" is of course only some difference in the parameters in the tube contributing to different curves. Ears are a very good analyzer for that :-)
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Old 11th June 2012, 05:59 PM   #10
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@keshaandrea: Russian tubes usually have pointy, sharp pins.

Superior russian tubes have pins that are made of cupronickel and stay shiny and oxide-free.

@the_manta: are red label Valvo tubes better quality than the white label ones?
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