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PostPosted: 02 Dec 2011, 23:56 
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rock4016 wrote:
Ebay has a bunch. The nice thing about TV tubes is that they made millions of tubes for them and the switch to solid state happened quickly. As such, there's a lot of tubes out there that are cheap and NOS.

Not like the 6T9 hey!

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Projects: "Sanctum" - 12AU7 and 6AS7 direct coupled headphone amp | "retro-Oatley 6J6" - 6J6 push-pull headphone amp with OPTs | "retro-Hiraga" - Jean Hiraga Le Monster
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PostPosted: 03 Dec 2011, 03:15 
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Grrrrrrr 6t9 compactron

I have also read similar with differing psu's and resultant sound wonder if a mashup of old and new is a goer

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PostPosted: 03 Dec 2011, 07:23 
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Grega wrote:
Grrrrrrr 6t9 compactronr

What's wrong with compactrons?? :confused: My 50CA10 are compactrons .... and runs on 50V!!! :alien:

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PostPosted: 03 Dec 2011, 09:06 
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Soundbrigade wrote:
Grega wrote:
Grrrrrrr 6t9 compactronr

What's wrong with compactrons?? :confused: My 50CA10 are compactrons .... and runs on 50V!!! :alien:

I don't see anything wrong with these tubes. I built 3 amps with 6T9s and now I understand they are very hard to source. I have a few sets left and about 4 odds.

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Projects: "Sanctum" - 12AU7 and 6AS7 direct coupled headphone amp | "retro-Oatley 6J6" - 6J6 push-pull headphone amp with OPTs | "retro-Hiraga" - Jean Hiraga Le Monster
Website: retro-thermionic


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PostPosted: 04 Dec 2011, 00:35 
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mwhouston wrote:
rock4016 wrote:
Ebay has a bunch. The nice thing about TV tubes is that they made millions of tubes for them and the switch to solid state happened quickly. As such, there's a lot of tubes out there that are cheap and NOS.
Not like the 6T9 hey!
Funny thing about the compactrons... The entire concept of the compactron was to compete with the new transistor circuits when they first came out. It was thought that if you could just pack more elements into a tube then they could be made cheap enough so that they could compete with the transistors which were, at first, rather expensive and not very reliable. However, this approach was quickly shown to be a dead end as transistors quickly became very cheap and very reliable in relation to tubes.

The consequence of this was that where there were literally millions of older style tubes in the supply chain as they supported the logistics of worldwide television maintenance, comparatively few TVs utilized the "new" compactron designs and, as such, much fewer of them were ever produced. This is part of what accounts for their relative scarcity today in relation to some much older designs of which there is an ample supply even 35 years later.

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PostPosted: 04 Dec 2011, 00:57 
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Well, there's enough compactrons and designs to keep Shuguang making sockets for them ;)

Cheers!

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PostPosted: 05 Dec 2011, 05:06 
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nothing wrong with the 6T9's guys, i've been looking for 2 to build a spare time gizzmos amp for YONKs - thats all :D

mark - spare a couple of 6T9's :D ????

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PostPosted: 05 Dec 2011, 05:36 
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Gega: I have got some few I can spare. If nothing else comes your way, I can give you an offer you can't resist. :snowman:

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PostPosted: 05 Dec 2011, 05:51 
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Grega wrote:
nothing wrong with the 6T9's guys, i've been looking for 2 to build a spare time gizzmos amp for YONKs - thats all :D

mark - spare a couple of 6T9's :D ????

Grega: Yes I have a couple I can let go. Magnus may have a better pair than mine. I asked one company for four tubes and they sent four from different manufactures in two different heights?? Go figure. I blasted them.

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Projects: "Sanctum" - 12AU7 and 6AS7 direct coupled headphone amp | "retro-Oatley 6J6" - 6J6 push-pull headphone amp with OPTs | "retro-Hiraga" - Jean Hiraga Le Monster
Website: retro-thermionic


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PostPosted: 05 Dec 2011, 06:48 
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In any case, I have two GE and one Zenith and a very anonymous (paint is rubbed off).

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