Cossor valves ride again?

[Cobaltblue]

I have noticed more and more valves of the audio persuasion being offered with various Cossor Logo's all from China of course.

Some are clearly eye candy.

An interesting development I expect they met too much resistance to brand them mullard

Not having a moan just curious

Anyone know if these are any good?

The appearance of the valve is I except important to the market they are aimed at.

Cheers

Mike T

[Peter.N.]

Interesting - bright emitters?.

Peter

[M0FYA Andy]

I don't think they will fit in most equipment designed to accept 6SN7's!

Andy

[Hartley118]

They look like they should give a nicely-rounded sound.

Martin

[G4XWDJim]

A 6SN7 like that would give me the pip.

Jim

[barrymagrec]

If they were real Cossor 6SN7s made in 1954 would they B65?

[Refugee]

I would hazard a bet that they have the electrode assembly of an ECC83 inside them.
They should work like an ECC83 on an adapter in an amplifier that has covers.
I tried it with a 6/30L2 in an ECC33 position and it made no difference to the sound.

[barrymagrec]

ECC82 is quite similar to a 6SN7 - ECC83 is very different.

[Refugee]

You are right.
The higher frequency and lower gain will make little difference at audio though.

[turretslug]

Someone will have spotted that the Cossor name was up for grabs and, with the escalation in price of certain valve types, will have felt that investing in having the name on their valves was a worthwhile cachet- wherever they came from and even if they use type designations never used by Cossor. Cossor were famous for having in-house glass-blowers stemming from their background in laboratory glass-ware, so perhaps the new users of the name felt that an attention-getting "heritage" envelope style was called for.

All the same, a top-pip envelope valve with an IO base just looks wrong, given that the base centre spigot with IO is hollow and traditionally used to accommodate the evacuation stub.

[TonyDuell]

Originally Posted by turretslug

All the same, a top-pip envelope valve with an IO base just looks wrong, given that the base centre spigot with IO is hollow and traditionally used to accommodate the evacuation stub.

Somewhere I have an EL34, I think Siemens branded, with the 'pip' on top. I have no idea what happened when it was made...

[snowman_al]

I think turretslug is correct, it is a good marketing opportunity to use an old valve makers name. They do look awful though, but several Chinese amps are showing up with octals that shape?

The EL34 with the pip was made by Ei in Yugoslavia and re-branded as several makes such as Siemens. (There is a button base and normal black base type too.) They are actually excellent valves.

Not sure how a 6/30L2 would work in an ECC8x position, the heater pins are not compatible?

[Refugee]

You are right about the 6/30L2. It was what I had to hand when I did my experiment.

[Lucien Nunes]

What I don't understand about product offerings like this, is that in some respects they are trading on the reputation of a respected original maker, but in connection with a design that the original maker did not and would never have made. It's like selling Mercedes biscuits or McVities cars. No-one would assume the bulbous 6SN7 inherits any original Cossor-ness, surely?

[ionburn]

I noticed these last night when trawling around through older valves. I must admit I was put off as soon as I saw they were from the far east (and that they were spotless and having a strange shape).

I can believe that there are those who may snap them up, just on the name (lesser knowledgeable members the notorious audio crowd). But if I had any doubts their price re-enforced my decision.

[ms660]

Hey don't knock the rock...I think they look ok, obviously for new build boutique designs so what's the problem, don't criticise what you can't understand, at least someone's making valves these days which is probably more than can be said for the "critics"

Lawrence.

[VT FUSE]

Ei vacuum tubes were contracted by Siemens and a few other manufacturers to produce valves to a very high standard in the latter years before conflict in the old Yugoslavia ended production.
Ei vacuum tubes bought Philips and Telefunken tooling when these manufacturers ceased economic production in Europe.

Somewhere on the internet (youtube) there are 2 videos showing production along with narrative and 1980's music,I will try and find it later and add a link,there are some pretty scary chemicals in use and H&S seemingly non existent.

[emeritus]

Trade marks can be worth a lot of money. Unlike patents, they can last for as long as their owner pays the renewal fees. The Bush trade mark changed hand several times in recent years, but the far eastern company that originally bought it from Rank Bush Murphy paid well over £1,000,000 for it.

[ITAM805]

Could this EL34 with a 'pip' be an EI too?

[Radio Wrangler]

Originally Posted by Lucien Nunes

What I don't understand about product offerings like this, is that in some respects they are trading on the reputation of a respected original maker, but in connection with a design that the original maker did not and would never have made. It's like selling Mercedes biscuits or McVities cars. No-one would assume the bulbous 6SN7 inherits any original Cossor-ness, surely?

This IS the audiophool world we're talking about....

I've found no limit to their assumptions and beliefs. They exist in their own assiduously-maintained fact-free universe.

David