(1 customer review)


MESA 5U4 / 5U3C / 5U4GB / 5C3S / 5AS4A


Mesa 5U4 | 5U3C | 5U4GB | 5C3S | 5AS4A. This is the earlier Mesa version ST shaped tube used in older Mesa Rectifier amplifiers. These are unlabeled but came directly from the Mesa factory. Getting harder to find so stock up now before they are HISTORY.

One of the finest rectifier tubes anywhere. No longer made and soon will be gone forever.

Tested on the RoeTest professional computer testing system.

WARNING: Cancer and Reproductive Harm-www.P65Warnings.ca.gov.

Additional information

Weight 4 oz
Dimensions 4.5 × 2 × 2 in
Single Tube or Matched Set >

Matched Pair, Matched Quad, Single Tube

1 review for Mesa 5U4 | 5U3C | 5U4GB | 5C3S | 5AS4A

  1. John H. (verified owner)

    Verified reviewVerified review - view originalExternal link

    Outstanding rectifier tube for use in my Willsenton R-800i amp which is picky on rectification and this tube was able to handle the load. Double getter

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