The Talking Machine Forum — For All Antique Phonographs & Recordings

It is currently Tue May 26, 2020 2:19 am

All times are UTC - 5 hours [ DST ]




Post new topic Reply to topic  [ 5 posts ] 
Author Message
 Post subject: Reproducer adjustments
PostPosted: Mon Feb 01, 2010 7:58 pm 
Offline
Victor Jr
User avatar
"Every fight is a food fight when you're a cannibal." - Dimitri Martin
Joined: Fri Jan 29, 2010 4:45 am
Posts: 19
Somebody mentioned adjusting the needles pivot point. Looking at the part where the needle is inserted, this looks like something I could easily do. But what exactly should I look or hear for? Here's a pic. As you can see, the holder where the needle goes seems to be adjusted all the way to one side:

Image


Top
 Profile  
 
 Post subject: Re: Reproducer adjustments
PostPosted: Mon Feb 01, 2010 8:18 pm 
Offline
Victor IV
Joined: Sat Jul 09, 2016 7:12 pm
Posts: 1638
From what I can see, the needle, itself, is aligned correctly. Normally, it's clamped to the side of the opening by the thumbscrew.


As for the needle bar's adjustment, this might explain it better:

Attachment:
Needle Bar Movement.JPG
Needle Bar Movement.JPG [ 46.83 KiB | Viewed 806 times ]


Top
 Profile  
 
 Post subject: Re: Reproducer adjustments
PostPosted: Tue Feb 02, 2010 7:48 am 
Offline
Victor Jr
User avatar
"Every fight is a food fight when you're a cannibal." - Dimitri Martin
Joined: Fri Jan 29, 2010 4:45 am
Posts: 19
I just checked it, apparently it's adjusted ok. Thanks for the info.


Top
 Profile  
 
 Post subject: Re: Reproducer adjustments
PostPosted: Tue Feb 02, 2010 12:02 pm 
Offline
Victor IV
Joined: Sat Jul 09, 2016 7:12 pm
Posts: 1638
Looking over your earlier post string -- CLICK HERE -- I agree with Gramophoneshane that the gaskets currently installed are probably impacting the sound quality.

The function of the gaskets is to isolate the diaphragm from the sound box's shell. They also enable the diaphragm to move back and forth with the movement of the needle/needle-bar. Probably, the standard "hollow tube" gaskets should work very well. They come in strips and can be cut to fit --

Image


Sound Box gaskets are available from a number of parts sellers including -- CLICK HERE

Other parts suppliers and repair shops are listed on this page -- http://www.proaxis.com/~settlet/record/links.html -- under the Accessories/Restoration section.


Top
 Profile  
 
 Post subject: Re: Reproducer adjustments
PostPosted: Tue Feb 02, 2010 2:17 pm 
Offline
Victor III
User avatar
So many phonographs, so little money
Joined: Thu Jan 08, 2009 8:12 pm
Posts: 939
Location: The Garden State
One other item you should check for: The pivot bar attaches to the center of the mica diaphragm. If it is adjusted too far in or out, it will push or pull on the mica, deforming it from center and will affect it's response and output.

If your reproducer provides for this, you need to adjust so the mica is planar (flat) when at rest. Hold the repro in your hand and move it around so you can see light reflected off of the mica surface. If it is deformed, you should be able to easily see that in the way light is reflected close to the center where the pivot bar attaches. Adjust the spring clips until the mica diaphragm is flat.
Why do we need signatures when we are on a first avatar basis?


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 5 posts ] 

All times are UTC - 5 hours [ DST ]


Who is online

Users browsing this forum: Bing [Bot], flying500, Google [Bot] and 8 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.