Uh, wait-a-hold-it. Last Saturday we were supposed to set our clocks one hour forward, not our calendars one month forward to April...April FIRST.
Sent from my iPhone -- Peter [email protected] On Mar 11, 2008, at 11:12 AM, "Robin & Joan Rolfs" <[email protected]> wrote: > Ooops ........ > I guess Necessity is the mother of invention. Thanks for the > reference. > > This item does beg some questions though. Apparently the owner went > through > a lot of work to try to simulate the intent of Charles Edison's > design and > further "improving" on it with an electric motor. Interesting > plumbing > needed to feed the horns from both the front and back of reproducer. > Probably did not produce too much volume from the MGM 78, however in > reality, it must have presented some problems with loading both horns > simultaneously. > > There must have been several reasons why Edison recording engineer > J.P. > Constable "viewed the experiments with amused detachment." > > Rob > > > > ----- Original Message ----- From: "Bill Boruff" <[email protected]> > To: "Antique Phonograph List" <[email protected]> > Sent: Tuesday, March 11, 2008 8:54 AM > Subject: Re: [Phono-L] Why Couldn't Edison Think of This? - THEY DID! > > >> They did think of this! ! This is a prototype that Charles Edison >> designed for use as an "out-of-doors phonograph" as he was seeking a >> machine to play "more robusr" outdoor music. It is pictured with its >> proper horn on page 46 of Frow's book on the Edison Disc Phonograph. >> Bill Boruff >> >> >> On Mar 10, 2008, at 9:14 PM, Robin & Joan Rolfs wrote: >> >>> Just when you think you've seen it all....... >>> >>> eBay # 120230759109 >>> >>> >>> >>> Rob >>> >>> Robin & Joan Rolfs >>> Visit us at: >>> www.audioantique.com >>> _______________________________________________ >>> Phono-L mailing list >>> http://phono-l.oldcrank.org >> >> _______________________________________________ >> Phono-L mailing list >> http://phono-l.oldcrank.org >> >> > > _______________________________________________ > Phono-L mailing list > http://phono-l.oldcrank.org From [email protected] Tue Mar 11 11:27:04 2008 From: [email protected] (Greg Bogantz) Date: Tue Mar 11 11:28:04 2008 Subject: [Phono-L] Why Couldn't Edison Think of This? - THEY DID! References: <000801c8831d$a2d298a0$b1c66...@owner094cc0223><[email protected]> <000601c883a3$701cc260$ecc66...@owner094cc0223> Message-ID: <000c01c883a5$81e06b30$6400a...@hpa1514n> Aside from being an unwieldly thing to try to operate, this lashup probably wouldn't have achieved the desired purpose. By adding a second horn, the sound pressure from the reproducer is divided between the two horns with the resultant sound pressure from the combined horn output being about the same as it is from a single horn. So without some additional changes to the design such as a different needle bar which could have been made to have more mechanical gain, the goal of getting more loudness from the player would not have been achieved. Constable probably had enough experience with phonographs to know this. Greg Bogantz ----- Original Message ----- From: "Robin & Joan Rolfs" <[email protected]> To: "Antique Phonograph List" <[email protected]> Sent: Tuesday, March 11, 2008 2:12 PM Subject: Re: [Phono-L] Why Couldn't Edison Think of This? - THEY DID! > Ooops ........ > I guess Necessity is the mother of invention. Thanks for the reference. > > This item does beg some questions though. Apparently the owner went > through > a lot of work to try to simulate the intent of Charles Edison's design and > further "improving" on it with an electric motor. Interesting plumbing > needed to feed the horns from both the front and back of reproducer. > Probably did not produce too much volume from the MGM 78, however in > reality, it must have presented some problems with loading both horns > simultaneously. > > There must have been several reasons why Edison recording engineer J.P. > Constable "viewed the experiments with amused detachment." > > Rob > > > > ----- Original Message ----- > From: "Bill Boruff" <[email protected]> > To: "Antique Phonograph List" <[email protected]> > Sent: Tuesday, March 11, 2008 8:54 AM > Subject: Re: [Phono-L] Why Couldn't Edison Think of This? - THEY DID! > > >> They did think of this! ! This is a prototype that Charles Edison >> designed for use as an "out-of-doors phonograph" as he was seeking a >> machine to play "more robusr" outdoor music. It is pictured with its >> proper horn on page 46 of Frow's book on the Edison Disc Phonograph. >> Bill Boruff >> >> >> On Mar 10, 2008, at 9:14 PM, Robin & Joan Rolfs wrote: >> >>> Just when you think you've seen it all....... >>> >>> eBay # 120230759109 >>> >>> >>> >>> Rob >>> >>> Robin & Joan Rolfs >>> Visit us at: >>> www.audioantique.com >>> _______________________________________________ >>> Phono-L mailing list >>> http://phono-l.oldcrank.org >> >> _______________________________________________ >> Phono-L mailing list >> http://phono-l.oldcrank.org >> >> > > _______________________________________________ > Phono-L mailing list > http://phono-l.oldcrank.org
