Re: Simple paging system needed

From: Jim Adney (jadney_at_vwtype3.org)
Date: 06/11/04 

Date: Thu, 10 Jun 2004 22:03:28 -0500

On Thu, 10 Jun 2004 13:50:26 GMT Bill Jeffrey
<wjeffrey@TAKE-THIS-OUTalum.mit.edu> wrote:

>I have no specific knowledge of your system, but you're right, it is
>dirt simple. It sounds like there is a simple two-wire telephone system
>(just like the phones in your house), with the wire pair connected to
>all the handsets. When you push a button (which happens to be the #7
>button on your handets), it pulls in a relay that also connects the wire
>pair to the input of the PA amplifier. There might be a third wire
>route to each phone which is used to pull in the relay, or it could be
>accomplished on the original wire pair.)

I'm not the one working on this. I'm just the one who thinks that it's
silly to replace everything just because we need to add a few more
handsets. Yes, I believe there are 4 wires to every phone.

>Regardless of how it happens, there is undoubtedly a relay somewhere
>near the PA amp input.

I know there is some kind of interface between the phone lines, which
are probably all wired just as you say, and the amp.

>You didn't say exactly what problem you are experiencing, but you said
>the amplifier is good and the speakers are good, and you need only a few
>handsets.

The ONLY problem is that we have a very few broken handsets which we
need to fix or replace, and we want to add a few more handsets in a
few places that don't already have them.

>This old Bogen stuff is bullet-proof - it never dies - and it would be a
>shame to replace it if you don't need to.

Any suggestions as to where to look for some old Bogen handsets?

What chance is there that we could just use standard phones, which I
can buy for less than $20, and add a button?

thanks,

-
-----------------------------------------------
    Jim Adney jadney@vwtype3.org
           Madison, WI 53711 USA
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Relevant Pages

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