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Tubes Asylum Questions about tubes and gear that glows. FAQ |
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Tubes Asylum Questions about tubes and gear that glows. FAQ |
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In Reply to: Who made this tube... posted by Kico on January 22, 2006 at 09:22:55:
As Jimmy says, it is of the RFT/RSD East German "conglomo" factory, generically referred to as "Siemens." They are OK, but the Winged C Svetlanas are better sounding for hifi and the Electro-guitarix are more durable in guitar amps. The real market for these are owners of 1980s MARSHALL guitar amps; the amps were "voiced" with this tube so to get the "real" sound many users look no further. Ironically, when Mullard closed up shop in 1984-85 and the XF4 EL34 disappeared, and then MPD/Owensboro Kentucky stopped supplying the US Govt. with 6CA7 GEs in 1987 or so, the US Govt. actually made a 3rd party purchase (via a U.K. distributor and a New York private importer, Temtron Elec, I believe) of TENS OF THOUSANDS of these Iron Curtain tubes from a Communist regime that, in 1987, they wished would vanish (and then it basically did!)They disbursed these in the early mid 1990s thru Richardson (labeled National as yours; the boxes had milspec inventory bar codes ad milspec #s on them)and Angela Instruments and other tube vendors bought THOUSANDS- I heard Angela alone bought 3500-5000; on ebay earlier this year Angela listed over 100 quads in 2 weeks and had a dozen quads perpetually available in their ebay store. As to how "good" 50/30 test result is, I would say "good enough!" Minimum is usually 65% of NOS transconductance.... so you are up against 100%+.
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- Re: Who made this tube... - tubecrazy 09:55:45 01/22/06 (0)
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