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A Talk battery DC supply With nothing connected? there would be no introduction of noise from anywhere else other than cable pair or connection faults. This is again dc in it's true form. This what we talk on!!!!!! Hello

The noise??? Other than what?


ITT 601 is the same spec as a Weco. I give up.


Again, I'm funny and can fix it. The good guys are almost dead or on the real deal of dead low voltage and various apps in this subject.

I'm still pissed at all mistakes I made with IA2.

This keeps me going for the love of this business..


Charlie

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I'm not sure about what you are asking here.

I didn't see anything about noise unless you are speaking of the original thread started last year. Those issues seem to have been resolved back in October.

Sorry to disagree, but the 601 was very, very different from WECO other than standard 1A2 functionality. Perhaps you are thinking of ITT's 501? That KSU was functionally and physically equivalent to WECO.

ITT came up with the 601 and WECO came up with the 551C about the same time, but they were very different in many ways.


Ed Vaughn, MBSWWYPBX
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I understand Ed .. I am only talking fixing 1a2 theory. ITT or Western does not matter.

The fuse potential was much worse on western electric key service units than the ITT

You should know this?

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Thanks for the help, but I still have a question. I know the 401 cards are talk only, no dial capability. But why is the 601 considered having an intercom capability? Is it a separate card that plugs in?


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Bill, the ITT 601 did have IC capability. As previously discussed, it warn't cheap. And if I recall correctly, you had to add a DTMF decoder card to make it work with touch-tone. And if you didn't protect both the CO lines and the AC power, the IC card would save the rest of the cabinet by dying first. I believe it went in the bottom slot. Some of the 601's came with a board layout glued inside the cover. Maybe you're 1 of the lucky ones. And if you peek all around the card slots, I believe they were marked in some way also. Been too long, sorry. John C. (Not Garand)


When I was young, I was Liberal. As I aged and wised up, I became Conservative. Now that I'm old, I have settled on Curmudgeon.
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"I know the 401 cards are talk only, no dial capability."

Let me be mistaken the 401 cards are a family of cards..I don't get the question?

The Intercom card is simular to any 401. Although, one would need to wire talk batery in to the KTU 400 TR intercom card off a DC source from the power supply. Again we talk on DC supper imposed. Once you begin to talk the wave is now AC.

Hope this helps you?

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I only know of the 401A and 401B. Is there another part of the family I don't know about? My understanding of the 401 card is that it only allows a talk circuit when the button is pushed, there is no type of dial capability with this card. So to make it functional you would have to have a separate paging or signaling system to let someone know you wanted to talk to them on the intercom.


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Yes used to use manual signal and buzzer system.

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Jim & Phonenut are correct. The 401 A required an 'A' lead; the 401B did not. They both provideded the same thing - a filtered talk path. You would use them with a button & buzzer system or with a matching transformer (WMT-1) as an access to a PA system (there was a contact closure that worked really well for muting the BGM.

Sam


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There is no type of dial capability with this card.?

If you connect the right DC voltage, again talk battery to the card it will DTMF.. The A lead is a off hook through the switch hook and dial pad..

Options might have to be changed in the set.


If you need a weco 400 intercom card let me know..

My point is that you can Use a Viking product with any exsisting line input of a 400d if you don't have this intercom card.

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