DIYAPASON-L Digest #880 - Sunday, September 14, 2003
RE: Quimby Organ / 32' diaphone
  by "Robert W. Taylor" <>
Re: Wiring color code
  by "Larry Chace" <>

(back) Subject: RE: Quimby Organ / 32' diaphone From: "Robert W. Taylor" <> Date: Sun, 14 Sep 2003 08:44:35 -0500   Frank Vanaman caught my error. I obviously had too much to see and comprehend at one time in my visit, although confusing 32' and 16' diaphones is a bit hard to do.   Since Frank mentioned the Junchen encyclopedia, I will reference my correction to that volume. The pipes that I saw are pictured on the bottom of page 78. Notice the CCC pipe--diaphone--is mitered to fit the pitched ceiling. The top of that pipe is not square. I put my hands on that pipe--the mitered part--in the Quimby shop. Those are the pipes I wrote about, and the rank is indeed 16'.   Additionally, I shorted the other instrument I wrote about. The large organ in the shop I refered to as *5m/100r*. I had meant to say 100 plus ranks. It is actually 157 ranks.   I'm sorry for the error. I should have been more careful in my reporting.   Bob Taylor      
(back) Subject: Re: Wiring color code From: "Larry Chace" <> Date: Sun, 14 Sep 2003 22:54:23 -0400   There is another "interesting" aspect to the color code(s) for telephone cable, and I use the plural on purpose!   There are apparently other codes that have been used, particularly in the context of telephone systems. While working on the relay wiring for a = 4/18 Wurlitzer, I recently found a document that had been prepared by a predecessor, and that document includes an alternate code labelled "Clifford/Ma Bell"; the reference to "Clifford" is probably to the company in Vermont that makes a great lot of cable, some of which has connectors already attached.   In this scheme, the 10 colors are divided into two groups, the "body" colors (white, red, black, yellow, and violet) and the "tracer" colors (blue, orange, green, brown, and slate). The tracer is described as being "long" or "short" relative to the body. So, what is often called = "WHT/BLU" is in this system called "WHT/BLU SHORT"; "BLU/WHT" is called "WHT/BLU LONG".   That, however, is not the big problem! The difference comes along when = the 50-pin connectors (often called "CHAMP" connectors) are used. In these connectors, the pins are numbered from 1-25 down one side and from 26-50 down the other side; 1 and 26 are across from each other, as are 2 and 27, etc., down to 25 and 50. In the "Clifford/Ma Bell" scheme, each wire is connected *ACROSS* from its pair, not adjacent (numerically). To make it even more confusifying, the "long" tracer wires come first, and are connected to one side of the connector, while the "short" tracer wires are on the other side.   Using "normal" notation, here are some wires and the CHAMP terminal = numbers associated with them:   01 WHT/BLU 26 02 BLU/WHT 01 03 WHT/ORG 27 04 ORG/WHT 02 05 WHT/GRN 28 06 GRN/WHT 03 07 WHT/BRN 29 08 BRN/WHT 04 09 WHT/SLT 30 10 SLT/WHT 05 .... 49 VIO/SLT 50 50 SLT/VIO 25   (Mentally sort this table by the CHAMP numbers and you'll see that the wires are grouped nicely by color, perhaps making it easier to see any wiring errors.)   This different numbering scheme is not a problem as long as you don't actually think about the numbering of the pins on the CHAMP connectors; = the wire has the same color throughout the cable. However, if you wire your own plugs or sockets and use them with commercial cables, then you need to check the color assignments very carefully! For example, if you punch = down the wires in "normal" order onto a terminal block, then you'll find that the terminal block numbers might not match the CHAMP plug numbers.   (On this particular instrument, the original installers were retired telephone workers, I was told, and they argued constantly among themselves as to the proper assignment of colors. In the end, they used several different schemes, including one in which each pair was reversed -- as you might imagine, this caused quite a lot of confusion, and ultimately we had to ring out a bunch of the wiring in the old fashioned manner.)   Larry Chace