The Talking Machine Forum — For All Antique Phonographs & Recordings

It is currently Sun Jun 16, 2019 12:47 am

All times are UTC - 5 hours [ DST ]




Post new topic Reply to topic  [ 9 posts ] 
Author Message
 Post subject: Need Knurled Knob for Columbia AB (MacDonald) Graphophone
PostPosted: Tue Feb 17, 2009 9:54 pm 
Offline
Victor II
User avatar
Joined: Wed Jan 07, 2009 9:05 pm
Posts: 315
I believe I mentioned this on the MOCAPS meeting Thread that was posted earlier. But here is a photo of the knurled knob from Jack Whelan's AB (thanks for the photo Jack). If anyone has this odd part in their parts supplies, and can spare it, please let me know. It is used to secure the large 5" mandrel to the AB, once it is slipped on over the regular Mandrel. Thanks, Bruce

Image


Top
 Profile  
 
 Post subject: Re: Need Knurled Knob for Columbia AB (MacDonald) Graphophone
PostPosted: Wed Feb 18, 2009 6:44 am 
Offline
Victor V
Joined: Fri Jan 09, 2009 3:47 am
Posts: 2382
Location: Jerome, Arizona
I think these used to be available from Dwayne Wyatt at 707-263-5013 (Pacific time zone). Hope this helps! John M
"All of us have a place in history. Mine is clouds." Richard Brautigan


Top
 Profile  
 
 Post subject: Re: Need Knurled Knob for Columbia AB (MacDonald) Graphophone
PostPosted: Wed Feb 18, 2009 3:03 pm 
Offline
Victor III
User avatar
Joined: Sun Jan 11, 2009 9:41 pm
Posts: 712
Location: okc ok
please let us know if you are successful getting this from Wyatt's. I need one of those also. Steve


Top
 Profile  
 
 Post subject: Re: Need Knurled Knob for Columbia AB (MacDonald) Graphophone
PostPosted: Wed Feb 18, 2009 3:18 pm 
Offline
Victor V
User avatar
Joined: Thu Jan 08, 2009 12:01 pm
Posts: 2186
Location: Allentown, Pennsylvania
Do you know the diameter and thread specs? This is probably something you could kluge up from standard hardware parts, if you can't find an original/repro. My eyeball says it looks like ¼"-20 or maybe 5/16"-20, which you can get for mere pennies from the parts drawers of your local, well-stocked, independently owned hardware store, as a hex-head machine bolt; they come in various lengths. Might be worth a try, especially if you need the part in order for the machine to function; it'll do 'til you can find a "real" one.

(The reason I'm guessing it's ¼"-20 is that's a very common size in photographic applications---tripod threads, flash brackets, and the like---and I bet I've had dozens of such gizmos over the years in my photography hobby.)


Top
 Profile  
 
 Post subject: Re: Need Knurled Knob for Columbia AB (MacDonald) Graphophone
PostPosted: Wed Feb 18, 2009 4:10 pm 
Offline
Victor II
Joined: Thu Jan 08, 2009 4:08 pm
Posts: 316
Location: Somewhere looking for a 9ft Brass Horn
Jean-Paul in Canada makes the 5 inch mandrels perhaps he makes repro screws too.

http://www3.sympatico.ca/jean-paul.agnard/phonograph/collection.htm

Scroll to the bottom of the page and you will see a spot to click and view his repro parts.

Not positive if he makes the screws but it never hurts to ask!

Aaron


Top
 Profile  
 
 Post subject: Re: Need Knurled Knob for Columbia AB (MacDonald) Graphophone
PostPosted: Wed Feb 18, 2009 4:22 pm 
Offline
Victor II
Joined: Wed Jan 07, 2009 7:21 pm
Posts: 276
Solophoneman,

It's possible you may also need a collar that slides over the hub of the mandrel for the knurled screw to press against. On my machine the brass collar is ⅝" in outer diameter and is ¼" long. I guess it would depend if your larger mandrel is original or a reproduction and if reproduction, some have it built onto the mandrel and some didn't. The knurled screw is 11/16" diameter and has a 5/16"-18 thread. The entire length of the screw is ½" (about half of that being the knurled portion).

I hope one of the parts suppliers has them available. Good luck

ColoradoPhonograph


Top
 Profile  
 
 Post subject: Re: Need Knurled Knob for Columbia AB (FOUND)!!!!!!!!!!!!!!!!!!
PostPosted: Wed Feb 18, 2009 10:58 pm 
Offline
Victor II
User avatar
Joined: Wed Jan 07, 2009 9:05 pm
Posts: 315
Bingo, I contacted Jean-Paul and he has the part, and I will be ordering it. So if anyone else needs one he seems to be the only specialty phonograph supplier that has one. Thanks everyone for your help and suggestions on this.

Bruce


Top
 Profile  
 
 Post subject: Re: Need Knurled Knob for Columbia AB (MacDonald) Graphophone
PostPosted: Wed Feb 18, 2009 11:00 pm 
Offline
Victor IV
Contact me for TMF tech support.
Joined: Wed Jan 07, 2009 2:01 pm
Posts: 1077
Location: Boston, MA
Bruce,

Glad to hear that you found one. At least if anyone else needs one, now they’ll know who to contact.

— MordEth

Proudly supporting phonograph discussion boards, hosting phonograph sites and creating phonograph videos since 2007.
Need web hosting or web (or other graphic) design? Support MordEth by using J-D Strong Consulting, Inc. for all of your IT consulting needs.
Want more phonograph discussion? Be sure to visit The Online Edison Phonograph Discussion Board.


Top
 Profile  
 
 Post subject: Re: Need Knurled Knob for Columbia AB (MacDonald) Graphophone
PostPosted: Thu Feb 19, 2009 2:55 pm 
Offline
Victor III
User avatar
Joined: Sun Jan 11, 2009 9:41 pm
Posts: 712
Location: okc ok
Thanks Bruce. I just got a note from Jean-Paul and put a check in the mail... Steve


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 9 posts ] 

All times are UTC - 5 hours [ DST ]


Who is online

Users browsing this forum: Bing [Bot], Teak and 6 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
Powered by phpBB © 2000, 2002, 2005, 2007 phpBB Group
Americanized by Maël Soucaze.