Like you, I've always associated Sylvania with factory Drakes. Sure could have been exceptions, I guess. Curious how you know your GE mixers to be "original"?
I understand metal gears were used in the later/last runs of 4-Line gear. My 23XXX and 25XXX 4C and 4XC, though well into the production life of the 4-Line, still have nylon gears. This link explains some of the changes and differences in the 4C over its lifetime and may prove interesting. http://www.zerobeat.net/drakelist/drakemod/drmod37.html Dan WB4GRA Sent from my iPhone > On Jul 9, 2016, at 8:49 AM, Mark <mar...@cox.net> wrote: > > I picked up an R-4C in the flea market this year at Dayton. It was a later > one, made sometime in 1977. I noticed that the mixer tubes, 6EJ7’s are > original and GE with date codes 1977 and were made in Great Britain. The > plates on these 6ej7’s are mesh, not solid. I’ve always thought that Drake > used Sylvania tubes and that their 6EJ7’s are quieter than most – less > crackling noise. Did Drake try these mesh plate tubes to address the noise > issue and are they any better? > > Finally, the PTO has metal gears on it, not molded nylon. Was that a > design change? > > 73 NO8J > > > _______________________________________________ > Drakelist mailing list > Drakelist@zerobeat.net > http://mailman.zerobeat.net/mailman/listinfo/drakelist
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