HammondWiki - Diff: AddATenthSetOfContacts

Differences between current version and predecessor to the previous major change of AddATenthSetOfContacts.

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Newer page: version 11 Last edited on January 5, 2011 8:11 am. by JeffDairiki
Older page: version 6 Last edited on September 7, 2010 10:58 pm. by 216.151.21.102
@@ -26,29 +26,35 @@
  
  
 I am the anonymous editor who added the above comment. 
  
-I know little about this site and/or how to log in and/or enter a password . I tried but, to no avail
+I am Alan P . DuBois and I own and work with Hammonds
  
-I am Alan P . DuBois and I work with Hammonds. freshairband@limo.net  
+I am editing this post to reflect my latest discoveries regarding L & M100 manual chassis that will accomodate 10 busbars
  
-To add further to my above comment:  
+The L133 manual chassis I originally spoke of is of different design than any other Hammond chassis I have seen.  
+The actuators, contact boards and terminal strip are ALL made of plastic. Hammond chassis usually have bakelite boards, etc., - interesting....  
  
-I have worked with many M100-series manual chassis.  
- NONE of the * M100* chassis I have worked with will accomodate 10 busbar contacts. 
+NONE of the M100 chassis I have worked with will accomodate 10 busbar contacts.  
+That is, _until recently!_  
  
-I have also worked with many L100 manual chassis .  
-The ONLY L100 manual chassis I have found that will accept 10 drawbar contacts is the L133. 
+I opened both an M103 and an L111 recently and they _both_ have room for a tenth busbar _and_ room for contacts for the tenth busbar, if installed . These chassis are the same as the L133 I described above. All plastic guts
  
-This particular L133 manual chassis I speak of is of different design than any other Hammond chassis I have seen .  
-The actuators , contact boards and terminal strip are ALL made of plastic - Hammond chassis usually have bakelite boards, etc., - interesting...
+I checked my history working with these spinets and found that 1964 and earlier L & M100s used the bakelite boards and would not accomodate 10 busbars. I have _not_ been into a 1965 vintage spinet . And , the last two models I opened up are 1966 vintage
  
-I added foldback to this particular chassis and I sold it - so I cannot give any more particulars about this "unique " chassis. I do have a photo of the backside of this L133 chassis but I have no idea how to post it here.  
+So, it was obviously a production change in 1966 (for sure) and possibly 1965, where Hammond added this "feature.
  
-I can only agree with the original post in that the ACTUATORS for M , L100s DO have 10 slots
-BUT, regarding adding a tenth contact, not all the L, and /or M100 chassis have slots for 10 contacts!  
+To find out if your L or M100 has such a chassis, from frontside, remove the metal L-shaped cover from the lower manual chassis assembly (two screws at each end). If the terminal contacts are mounted to a black, plastic board (as shown below) , chances are you have one of these 10-busbar chassis
+  
+[http://comics.limo.net/L111CHASSIS/BOTTOM.JPG]  
+  
+Note the "square" busbars used in this chassis  
+[http://comics.limo.net/L111CHASSIS/END1.JPG]  
+  
+I added a tenth busbar as shown in this photo.  
+[http://comics.limo.net/L111CHASSIS /10_BARS.JPG]  
  
-All I can say is, beware of buying an M-, or L-100 with hopes of adding a 10th set of contacts and/or a 10th busbar.  
-You should find out what's inside the chassis before you buy!  
  
  
 Thanx, Alan 
+  
+ ''Great write-up Alan! Thank you for contributing to the wiki.'' -- JeffDairiki  

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