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PostPosted: 08 Dec 2010, 12:51 
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Joined: 27 Oct 2010, 20:27
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I was wondering if anyones tried different tubes in their K12G/M kits. They come stock with 10GV8's of an indeterminate brand... are there "better" tubes by other manufacturers that people have found sound better? I can't really find much info on the sonic properties of various brands of these tubes as I think they're mostly used in TV's.


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PostPosted: 08 Dec 2010, 13:50 
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Joined: 05 Nov 2010, 21:07
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Location: South East US - Tennessee
The 6GV8, 8GV8, 9GV8 & 10GV8 are all the same, but with 6, 8, 9, & 10 volt filaments, respectively. The closest equiv I could find was the ELC85, but it is 6v filament.

This tube fall in the catagory of a compactron, which were "design specific", meaning they had a specific purpose. This tube combines a triode and power pentode in one package.

Best information I've found;
http://tubedata.milbert.com/sheets/030/e/ECL85.pdf

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PostPosted: 09 Dec 2010, 13:19 
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From what I can tell the 10GV8 tube (supplied with the K-12G kit) and the 11MS8 (supplied with the K-12M kits) apear to be quite similar, so they should both work in the kits. The 11MS8 are getting harder to find and more expensive which I understand is the reason for the tube change.

If you take a look both the schematics:
The only differences are R8 and R17 which are 150R / 3W in the K-12G (10GV8) and 300R / 3W in the K-12M (11MS8).

Hope this helps.
Cheers

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PostPosted: 09 Dec 2010, 13:46 
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are there any particular brands of 10GV8's that people have found sound better than the stock tubes?


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PostPosted: 10 Dec 2010, 13:11 
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For the 11MS8 I went through the stock set provided with the K-12M tube amp kit and replaced them with a set of International Servicemaster brand. I did not do a comparison between the two because the stock tubes were old.

Cheers

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