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Teltone intercom question
#636484 04/19/20 05:14 PM
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Does anyone know the difference between the Teltone EX-18 and the EX-18A ?

Both are for sale on Ebay, and the labels look similar. Is the A version just an improvement on the same circuit, or does it do something different/ better?

Thanks,


Arthur P. Bloom
"30 years of faithful service...15 years on hold"

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Re: Teltone intercom question
Arthur P. Bloom #636485 04/19/20 09:15 PM
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Re: Teltone intercom question
Arthur P. Bloom #636487 04/19/20 11:18 PM
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I sure don't know a thing about that. Thanks for the kudos, Dean, but Arthur can run circles around me. If he comes along asking a question, there probably isn't an answer!


Ed Vaughn, MBSWWYPBX
Re: Teltone intercom question
Arthur P. Bloom #636499 04/20/20 08:52 PM
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Ed, thanks for the...compliment?...I think.


Arthur P. Bloom
"30 years of faithful service...15 years on hold"

Re: Teltone intercom question
Arthur P. Bloom #636524 04/21/20 11:57 PM
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Speaking of packaged dial intercoms, such as the Teltone and Melco ones, there are two specialized punch-down blocks on Ebay right now. (not my auction) They are designed to accept a double-ended 25-pair cable from the icm units and provide all the outputs you need, with the correct terminal designations, without having to punch down the feed cable. Nice addition to the collection, Chris, or Moss-51. Just sayin'


Arthur P. Bloom
"30 years of faithful service...15 years on hold"

Re: Teltone intercom question
Arthur P. Bloom #636543 04/22/20 09:23 PM
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Arthur, got a link?


Jeff Moss

Moss Communications
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Re: Teltone intercom question
Arthur P. Bloom #636547 04/23/20 01:29 AM
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Arthur P. Bloom
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Re: Teltone intercom question
Arthur P. Bloom #636549 04/23/20 03:50 PM
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Nice!

Good find.

Sam


"Where are we going and why are we in this hand basket?"
Re: Teltone intercom question
Arthur P. Bloom #636551 04/23/20 08:53 PM
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Yes, Sam, they are nice. When I worked for AT&T at Mt.Sinai Hospital, we had probably 300 dicms in service. We would take a 66B-50 and slide the back off and remove the pins. Then we'd populate the block with 6-across, 3-across, and 2-across pins from a 66M -50 block to make, pretty much, what these are. I guess we were ahead of our time.

One project we had was replacing, one by one, the 207C/216A wire spring relay KTU's with the Teltone packaged units.

The head installer, a telephone genius by the name of Jay Yovino, "invented" that scheme, along with another of his clever items, a 66B populated with 2-across, two blank spaces, and 2-across, creating a dense common audible diode block that took up a great deal less real estate on a backboard than the WE version. We had several closets where just the diode matrix blocks took up a 4' by 6' space. He also was instrumental in getting the company to supply power cord extensions for the 79- and 90-type modular power units, where the cords on the 620 and 640 panels were too short to do a neat installation.


Arthur P. Bloom
"30 years of faithful service...15 years on hold"

Re: Teltone intercom question
Arthur P. Bloom #636552 04/23/20 09:46 PM
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that is pretty neat, but I don't have a use for one personally smile


Jeff Moss

Moss Communications
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