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post #1006 of 1697
Quote:
Originally Posted by Artsi View Post

 

Philips ECC230 used and paired with similar looking philips 6080. These were used, but they seem to work fine.

 

That reminds me of something I wrote quite a while ago here:

 

http://www.head-fi.org/t/410326/for-6as7g-tube-rollers-here/30#post_5521873

 

I wonder if your tubes were made by Mullard at Mitcham. Can you check the codes?

post #1007 of 1697

Their construction is not likely to be from Mitcham I think.

But you are right, let's see the codes.


Edited by G600 - 1/16/14 at 12:05pm
post #1008 of 1697
Quote:
Originally Posted by G600 View Post
 

Their construction is not likely to be from Mitcham I think.

 

That could well be. This one is clearly different: http://www.r-type.org/exhib/aaa0725.htm

post #1009 of 1697

Different but without the vertical pieces between the micas

post #1010 of 1697
Quote:
Originally Posted by Oskari View Post
 

 

That reminds me of something I wrote quite a while ago here:

 

http://www.head-fi.org/t/410326/for-6as7g-tube-rollers-here/30#post_5521873

 

I wonder if your tubes were made by Mullard at Mitcham. Can you check the codes

 

ECC230 has codes AJO R7J. 6080 does not have any codes, but structure looks same.

post #1011 of 1697
Quote:
Originally Posted by Artsi View Post
 

ECC230 has codes AJO R7J.

 

Thanks. This seems to be an early (1957) version of the Mitcham 6080. Indeed there is one at http://www.r-type.org/exhib/aah0004.htm

post #1012 of 1697

So it's a very good pick !

My bad ;)

post #1013 of 1697
Hello,

I recently bought a quad of WE 421A tubes for my little dot MK VI+. The improvement over the stock 6080 tubes is amazing. Soundstage, gain, bass...all improved. I am curious about the construction of the 421A. It seems there might be several variations. All the photos I have seen have two round or D getters at the bottom of the tube, pig tail/ twisted wires at the bottom.r

However, mine seem nearly identical to the 5998. No pig tail wires, and three have the getters at the top. One of mine has a round getter at the top and one on the side. I just wonder why all the inconsistency and what makes a 421a a 421a? The specs?

Thank in advance for any thoughts!




Edited by Karllin - 2/3/14 at 12:30pm
post #1014 of 1697
I picked up a pair of NOS/strongly tested Amperex 6080s for relatively cheap. Haven't seen them mentioned anywhere so I got curious. Here's some pics. Sounds rather nice thus far, definitely enjoyable sounding. dt880smile.png




post #1015 of 1697
Those are GE made 6080's. Nice tubes, but indeed generally available fairly cheap.
post #1016 of 1697
Quote:
Originally Posted by Skylab View Post

Those are GE made 6080's. Nice tubes, but indeed generally available fairly cheap.

Skylab to the rescue! Thanks for the info. beerchug.gif
post #1017 of 1697
Quote:
Originally Posted by Karllin View Post

Hello,

I recently bought a quad of WE 421A tubes for my little dot MK VI+. The improvement over the stock 6080 tubes is amazing. Soundstage, gain, bass...all improved. I am curious about the construction of the 421A. It seems there might be several variations. All the photos I have seen have two round or D getters at the bottom of the tube, pig tail/ twisted wires at the bottom.r

However, mine seem nearly identical to the 5998. No pig tail wires, and three have the getters at the top. One of mine has a round getter at the top and one on the side. I just wonder why all the inconsistency and what makes a 421a a 421a? The specs?

Thank in advance for any thoughts!




I have 421A and to me they are very close to 5998, its still debated and im not sure theres a clear answer yet, but probably just 5998 with better specs and whatnot, to me they sound like 5998 but perhaps a little more air / treble extension. They do look nicer and the glass is slightly fatter than the 5998 though but otherwise they sound almost the same to me. But yeah not sure if equal to 5998 or slightly better 5998 or an upgraded 5998







Was gonna say. They definitely are ge tongue.gif
I dont think amperex made 6080
post #1018 of 1697
Hello Dubstep Girl,

Do your 421a tubes have double round getters at the bottom? I am just wondering why mine are different from others I have seen. Three of mine have the round getters at the top, one has a getter at the top and one on the side. None of mine have the twisted wires at the bottom. These are the only 421a I have seen that have the same bottom construction as the 5998. I am guessing western electric labeled these 421a due to their specs. Kind of like binned chips today. But they are definitely built different from most the 421a I have seen.

Thanks,

Karl
post #1019 of 1697
Quote:
Originally Posted by Skylab View Post

Those are GE made 6080's. Nice tubes, but indeed generally available fairly cheap.

Even the typeset of the etching gives it away as a GE tube.
post #1020 of 1697
Quote:
Originally Posted by Karllin View Post

Hello Dubstep Girl,

Do your 421a tubes have double round getters at the bottom? I am just wondering why mine are different from others I have seen. Three of mine have the round getters at the top, one has a getter at the top and one on the side. None of mine have the twisted wires at the bottom. These are the only 421a I have seen that have the same bottom construction as the 5998. I am guessing western electric labeled these 421a due to their specs. Kind of like binned chips today. But they are definitely built different from most the 421a I have seen.

Thanks,

Karl

I have to check later but mine are slightly different i think as well. Or maybe not.



Quote:
Originally Posted by DefQon View Post

Even the typeset of the etching gives it away as a GE tube.

+1
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