 High School Telephone Technology Project |
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| By mail | 01/07/2013 10:35:53 | |
| Summary I am a high school technology teacher in New Jersey. For a communications technology unit I am designing, students will construct telephones from scratch and create a switch board to communicate amongst themselves. My personal background is in ham radio and electronics in the U.S. Navy many years ago. There are many old books designed for young boys in the 30’s and 40’s that show how to construct phones. I have copies in pdf format for anyone interested. Basically you attach a diaphragm to graphite/carbon buttons in a miniature piston cylinder, make a diaphragm, and compress carbon particles to vary the resistance. Sounds simple until you try getting the materials that were available in 1930 now. I thought the acquisition of microphone carbon would be easy: not so. I’ve been experimenting with various forms of carbon granules, ground up pencils, motor brushes, welding rods, carbon zinc batteries, etc. but have not found any granules that function as efficiently as the granules removed from existing telephone transmitters. Anyone out there have any suggestions where to get granules in a modest quantity? Working with high school students, one has to allow for some loss of material and I was hoping for a sack of carbon granules on ebay, to my dismay they are not available anywhere. I’d love to share my research to date with anyone interested. My email is: rconsales@mhrd.org After showing my class the A&E Man, Moment, Machines Video I was intrigued by the resemblance to the unit they held up as an example of the first phone to ones that we are constructing. Would look forward to hearing from anyone regarding constructing early phones.Regards,Rich Consales Morris Hills HIgh School Technology Dept. Rockaway, New Jersey |
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| switchboard |
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| By | 02/29/2012 11:49:42 | |
| Summary I have an old switchboard with matching green operator chair.. would love to get out of my way.. |
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| Ansafone |
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| By | 12/19/2011 15:45:39 | |
| Summary Does anyone have an owner’s/operator’s manual and schematic for the 1968 Ansafone Model KH 85-F. It is the one that is grey and has two antlers. I am trying to restore it. |
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| Western Electric Shmoo phone |
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| By | 03/31/2010 02:02:40 | |
| Summary Folks: I understand this phone was used for field trial only. Does anyone know how many were used in field trial and how they were disposed after field trial?Thanks,Mr. Ling Lee |
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| Your Western Electric Swbd. |
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| By | 02/06/2010 17:18:07 | |
| Summary You said you would have to do more research. I had one of these boards a “friend” hauled to the dump when I was away at college back in the 60’s. The board had a top section with keys for “Fire Alarm” and “Common talking and listening” It was totally DC, and the standard WE phones used DC ringers, and the phones connected with three-wires. Supervision was by line lamps. There was a very nice one of these boards for sale on eBay not too long ago, but I think it didn’t sell. The one I had came from my High School and it was installed originally in 1917. There is quite a discussion about one of these boards in the Graybar catalogue around 1917. One thing nice about this board is when growth occurs, all you have to do is add another section to the top. Mine had 5 for total of 100 lines. Hope this helps.. Bruce |
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| Hi John Long Long time |
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| By | 01/05/2009 14:38:49 | |
| Summary Was just browsing and found this web page. What a suprise. I still have the Brass Candle stick phone you fixed for the key system on Edison St. Do you remember? I am now in Germany. Sold the comm business in Texas in 89 and went back into the Navy, Retired a Master Chief in 2000 now working for the Govt as a contractor. How have you been//David |
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| American Electric Glass Mouthpiece |
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| By | 11/22/2008 11:16:32 | |
| Summary I have an original american electric glass mouthpiece with the writting American Electric Co. Chicago on the brass portion. Can anyone out there tell me a little about it and also the value. Thank you. Kristie |
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| Looking for BSP for WE 592A ringer |
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| By | 12/20/2007 14:15:24 | |
| Summary I need a BSP (Bell System Practice) for WE 592A loud extension bells… Does anyone have a copy I can get of this? |
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