Re: [Phono-L] Edison S-19-SM - reproducer gaskets
That's what I like about this group, you learn something new about your passion all the time. The earliest reproducer I have is on my C-250, the one with the screwed on stylus plate. This machine is from 1916. It does have cork gaskets so they must have been been replaced very early on. I've had several reproducers with the screw-on plates and they all have had cork. They must have kept the dealers busy retrofitting! Thanks for the info. Bruce Edison switched to cork gaskets around 1924 as he found that cork retains resiliency longer than rubber. (from Ron D) Hello Bruce, You must have only seen the later DD reproducers, from 1912 to 1924 the gaskets are a soft natural rubber that began to harden in as little as six months. I have seen Edison cylinder reproducers with cork gaskets, Edison still did repairs into the 1920's. Steve ___ Phono-L mailing list http://phono-l.oldcrank.org
Re: [Phono-L] Edison S-19-SM - reproducer gaskets
And how are the cork gaskets? The ones I've seen (and replaced) seem rather brittle and most of the time have deformed and come out from under the flat ring. Ron L -Original Message- From: phono-l-boun...@oldcrank.org [mailto:phono-l-boun...@oldcrank.org] On Behalf Of Bruce Mercer Sent: Tuesday, September 15, 2009 10:47 AM To: Antique Phonograph List Subject: Re: [Phono-L] Edison S-19-SM - reproducer gaskets That's what I like about this group, you learn something new about your passion all the time. The earliest reproducer I have is on my C-250, the one with the screwed on stylus plate. This machine is from 1916. It does have cork gaskets so they must have been been replaced very early on. I've had several reproducers with the screw-on plates and they all have had cork. They must have kept the dealers busy retrofitting! Thanks for the info. Bruce Edison switched to cork gaskets around 1924 as he found that cork retains resiliency longer than rubber. (from Ron D) Hello Bruce, You must have only seen the later DD reproducers, from 1912 to 1924 the gaskets are a soft natural rubber that began to harden in as little as six months. I have seen Edison cylinder reproducers with cork gaskets, Edison still did repairs into the 1920's. Steve ___ Phono-L mailing list http://phono-l.oldcrank.org ___ Phono-L mailing list http://phono-l.oldcrank.org
Re: [Phono-L] Edison S-19-SM - reproducer gaskets
Thanks for the kind reply. The screw on plate is the second style made from around 1913 to 1915. I enjoyed reading this as I have never seen an earlier one with cork. One thing about Edison there is always more to learn. I recently saw a reproducer originally with a Duncan stop upgraded to an Edisonic with nickel plating. Steve That's what I like about this group, you learn something new about your passion all the time. The earliest reproducer I have is on my C-250, the one with the screwed on stylus plate. This machine is from 1916. It does have cork gaskets so they must have been been replaced very early on. I've had several reproducers with the screw-on plates and they all have had cork. They must have kept the dealers busy retrofitting! Thanks for the info. Bruce ___ Phono-L mailing list http://phono-l.oldcrank.org
Re: [Phono-L] Edison S-19-SM - reproducer gaskets
The ones on the small reproducers like the C H K held up well, the most of the ones on the DD reproducers have been deformed and come out. Steve And how are the cork gaskets? The ones I've seen (and replaced) seem rather brittle and most of the time have deformed and come out from under the flat ring. Ron L ___ Phono-L mailing list http://phono-l.oldcrank.org
Re: [Phono-L] Edison S-19-SM - reproducer gaskets
Yeah, I was gonna have to call that one -- why on earth would anyone attempt to dampen vibrations in an acoustic playback system? From: maxbu...@wowway.com To: phono-l@oldcrank.org Date: Sun, 13 Sep 2009 01:15:27 -0500 Subject: Re: [Phono-L] Edison S-19-SM - reproducer gaskets In the first place gaskets in an Edison DD reproducer were cork not rubber. It is extremely important that the diaphragm is air tight. snip If you don't believe the O ring (air tightness) makes any difference (air tightness), take it out and compare the difference. Air leakage is very detrimental in an acoustic system. Bruce Assume that all old rubber gaskets need replacement. They are not there to make the diaphragm airtight BUT to act as vibration dampeners. _ Hotmail: Powerful Free email with security by Microsoft. http://clk.atdmt.com/GBL/go/171222986/direct/01/ ___ Phono-L mailing list http://phono-l.oldcrank.org
Re: [Phono-L] Edison S-19-SM - reproducer gaskets
Edison switched to cork gaskets around 1924 as he found that cork retains resiliency longer than rubber. (from Ron D) Hello Bruce, You must have only seen the later DD reproducers, from 1912 to 1924 the gaskets are a soft natural rubber that began to harden in as little as six months. I have seen Edison cylinder reproducers with cork gaskets, Edison still did repairs into the 1920's. I use a Q-Tip and a Dremel tool to polish the inside of the body where the stud goes and the stud itself. I use synthetic oil so it will not gum up again. The stylus bar is another critical area, many times it is gummed up and does not move freely. Steve In the first place gaskets in an Edison DD reproducer were cork not rubber. It is extremely important that the diaphragm is air tight. Also make sure that that that end of the linkage is tight as well. The brown material you see is burnt shellac. That was used to seal the cone to the diaphragm and over the ends of the tiny nut retaining the stylus cord. Using Pvc-E here works fine as there is no shear motion and stays pliable unlike the burnt shellac that is ridgid. The object again is to make it airtight. If you REALLY want to tighten things up, install an O ring of perfect size as the end of the reproducer. I tack mine on with Crazy glue. Now you have an airtight chamber from diaphragm to tip of horn. If you don't believe the O ring (air tightness) makes any difference (air tightness), take it out and compare the difference. Air leakage is very detrimental in an acoustic system. Bruce ps. remove and polish the rear weight bearing with silver polish, and re-oil. This is often overlooked. Assume that all old rubber gaskets need replacement. They are not there to make the diaphragm airtight BUT to act as vibration dampeners. ___ Phono-L mailing list http://phono-l.oldcrank.org -- ATTACHMENT -- **An Attachment Was Scrubbed** Name: ModelH factory repair.jpg Type: image/jpeg Size: 40645 bytes URL: http://oldcrank.org/pipermail/phono-l/attachments/20090914/8a04ad0f/attachment.jpg ___ Phono-L mailing list http://phono-l.oldcrank.org
Re: [Phono-L] Edison S-19-SM - reproducer gaskets
In the first place gaskets in an Edison DD reproducer were cork not rubber. It is extremely important that the diaphragm is air tight. Also make sure that that that end of the linkage is tight as well. The brown material you see is burnt shellac. That was used to seal the cone to the diaphragm and over the ends of the tiny nut retaining the stylus cord. Using Pvc-E here works fine as there is no shear motion and stays pliable unlike the burnt shellac that is ridgid. The object again is to make it airtight. If you REALLY want to tighten things up, install an O ring of perfect size as the end of the reproducer. I tack mine on with Crazy glue. Now you have an airtight chamber from diaphragm to tip of horn. If you don't believe the O ring (air tightness) makes any difference (air tightness), take it out and compare the difference. Air leakage is very detrimental in an acoustic system. Bruce ps. remove and polish the rear weight bearing with silver polish, and re-oil. This is often overlooked. Assume that all old rubber gaskets need replacement. They are not there to make the diaphragm airtight BUT to act as vibration dampeners. ___ Phono-L mailing list http://phono-l.oldcrank.org
Re: [Phono-L] Edison S-19-SM - reproducer gaskets
Re: Diamond Disc Reproducer Assume that all old rubber gaskets need replacement. They are not there to make the diaphragm airtight BUT to act as vibration dampeners. New compliant gaskets in a properly adjusted reproducer will greatly increase the bass response and make for more clear sound reproduction. The diamond stylus can be worn down and should be checked with a microscope to be sure there is no flat spot or damage that would cause records to wear. Regards to all, Al ___ Phono-L mailing list http://phono-l.oldcrank.org
