Hi Dan, I reached the conclusion based on two factors. The serial number of this R-4C is 28188, which according to Ron's website (www.wb4hfn.com) put its date of manufacture in November of 1977. The GE tubes, all the same, are OEM marked, with the date code 7743, made the 43rd week of 1977. All the other tubes are Sylvania, but not these mixers!
73 de NO8J -----Original Message----- From: Drakelist [mailto:[email protected]] On Behalf Of [email protected] Sent: Saturday, July 09, 2016 12:00 PM To: [email protected] Subject: Drakelist Digest, Vol 57, Issue 3 Send Drakelist mailing list submissions to [email protected] To subscribe or unsubscribe via the World Wide Web, visit http://mailman.zerobeat.net/mailman/listinfo/drakelist or, via email, send a message with subject or body 'help' to [email protected] You can reach the person managing the list at [email protected] When replying, please edit your Subject line so it is more specific than "Re: Contents of Drakelist digest..." Today's Topics: 1. 6EJ7 Mixers - Meshed Plates - Metal PTO Gears (Mark) 2. Re: 6EJ7 Mixers - Meshed Plates - Metal PTO Gears (Dan Martin) ---------------------------------------------------------------------- Message: 1 Date: Sat, 9 Jul 2016 08:49:42 -0400 From: "Mark" <[email protected]> To: <[email protected]> Subject: [Drakelist] 6EJ7 Mixers - Meshed Plates - Metal PTO Gears Message-ID: <[email protected]> Content-Type: text/plain; charset="us-ascii" 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 -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://mailman.zerobeat.net/pipermail/drakelist/attachments/20160709/9f0eab e6/attachment-0001.html> ------------------------------ Message: 2 Date: Sat, 9 Jul 2016 11:21:50 -0400 From: Dan Martin <[email protected]> To: Mark <[email protected]> Cc: [email protected] Subject: Re: [Drakelist] 6EJ7 Mixers - Meshed Plates - Metal PTO Gears Message-ID: <[email protected]> Content-Type: text/plain; charset="utf-8" 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 <[email protected]> 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 > [email protected] > http://mailman.zerobeat.net/mailman/listinfo/drakelist -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://mailman.zerobeat.net/pipermail/drakelist/attachments/20160709/2627d3 8d/attachment-0001.html> ------------------------------ Subject: Digest Footer _______________________________________________ Drakelist mailing list [email protected] http://mailman.zerobeat.net/mailman/listinfo/drakelist ------------------------------ End of Drakelist Digest, Vol 57, Issue 3 **************************************** _______________________________________________ Drakelist mailing list [email protected] http://mailman.zerobeat.net/mailman/listinfo/drakelist
