the Reprocessed Tube Racket

“Standard Brand“, “Rad-Tel“, “Atomic“, “Cosmic” — what kind of brands are these? I found an interesting tube-related article in the Dec-1955-Jan-1956 issue of NATIONAL RADIO-TV NEWS.  The article exposed a supply-chain problem during the 1950s where unscrupulous vendors would buy “pull-outs” (duds or near-end-of-life tubes) from repair shops, then manipulate the tubes in a manner …

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PACO SA-50 Tube Amp Rebuild

I find it exciting to discover a nice audiophile amp from a nondescript brand.  In this article, I chronicle my rebuilding of a PACO preamp-amplifier model SA-50. PACO is the Precision Apparatus Company, best known for building quality test equipment such as tube testers, signal generators, and oscilloscopes.  The “PACO” branded gear (as opposed to …

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