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Glass swap


USNRET

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I'm not much of a roller just wanted to save the originals for whatever reason BUT these sure improved the sound. The sweet spot is much bigger especially in the fore/aft plane. Better / wider sound stage and great center. Very little bias drift from 2 minute set to 30 minute check.

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23 hours ago, USNRET said:

I am removing the Mc branded tubes from the MC2000 to put away. Replacing with the pictured ones. Also swapping out the C2500 line stage tubes.

MC2000_1.jpg

MC2000 replacement.jpg

I am intrigued by the Tung-Sol 12AX7's, especially since the box also states ECC803S.  Do you know if these are new production or vintage?  Some of the Tung-Sol tubes were made by RCA.  Would you mind taking a photo of the codes on the tubes?

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11 minutes ago, jimjimbo said:

I am intrigued by the Tung-Sol 12AX7's, especially since the box also states ECC803S.  Do you know if these are new production or vintage?  Some of the Tung-Sol tubes were made by RCA.  Would you mind taking a photo of the codes on the tubes?

Per your recommended contact they are ECC803S/12AX7 Tung-Sol reissue

 

20171231_090009.jpg

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