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RE: The story of 6AS7G "Coke Bottle"?

Posted by Skylab (A) on December 6, 2007 at 17:02:07

In Reply to: The story of 6AS7G "Coke Bottle"? posted by Muggemand on December 6, 2007 at 13:06:30:

I am not an expert in this regard, so please take what I say with a grain of salt. I do, however, have 2 headphone amps that use 6AS7G's, and I have about 20 or so of these tubes.

RCA definitely seems to have made more of them than anyone else. The grey lettered ones are older, as you guessed; the red lettering "Radiotron" are newer. RCA also made them under contract to the US military, with the "JAN-CRC" designation. Less common are ones that were branded GE.

But Hytron and Raytheon also made 6AS7G's. I have one of each. Also, GEC in Britain and Ultron in (W) Germany made 6AS7G's.

There are also the variants, like the Tung-Sol 5998, which was also branded as the Western Electric 421a.

I love the sound of the 6AS7G in the headphone amps I have - wonderful tube.

Rob

"Let there be songs, to fill the air"

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