atcomsystems.ca/forum Forums Wiring - Telecom Carriers - Trunks & Services Security, Alarms and Paging microphone ?

Twisted pair you da man!!!!! I am going on site today to confirm model numbers, this is a hospital that always calls us to clean up someone elses mess.

ok it has 1 peavey ua35tii has aux input with 2 rca plugs, 1 executone wma-35 has no visible input/output can be replaced with bogen if need be,& 7 tpu 1 b in which actually only 1 is for paging & music.I really appreciate all your help...

Okay, just to double check a few things.

I think you mean TPU-100B, I don't think there is such a thing as a TPU-1B.

You said only 1 of the Bogens are being used for music and paging but I think you mean music only, all amps are used for tel page?

I found the specs for the Peavey online but I can't find the Executone.

If anyone on here knows this amp (Executone WMA-35), please chime in here. I need to know what it has for ins and outs.

You hit it right , my wireless keyboard battery must be low, it is missing key strokes. It is tpu-100b, yes they all have page & will all need microphone, but only 1 bogen instead of 2 has music, I told him today I thought I would have to replace the executone, because it didn't appear to have bridging jacks.

This sounds like a real mess. Looks to me like you can replace all the amps with two, 1 for the entrance and lobby and the other for the rest. Probably the reason for all the amps is that there are a lot of speakers and the incompetent who did that didn't know about a 70 volt constant voltage system. So that will require replacing speakers also.

That's where I would begin. Trying to work with what's there is a waste of time, throwing good money after bad. Walk away if they aren't receptive to a complete replacement.

I also think you are in over your head here if you didn't recognize this.

-Hal

no need to be rude, I appreciate twisted pair helping without making any negative comments,I did not design the system , I have just worked with the new maintenance director at other facilities,and am trying to use what they have to add an emergency microphone,speakers are tapped different in different areas and would be a pain to change to 2 amps, plus it would be a huge job to replace all the speakers, which are all ready 70v,so i don't understand what you nmean replace them. I have been a telephone man for 13 years , but i wasn't born one, haven't ran into anybody that knows everything, I would even being willing to bet that i could help you on something someday...

I didn't mean to be rude just telling it like I see it. Not everybody is going to tell you what you want to hear. We all can't be experts at everything, you have to know your limitations.

If all speakers are 70 volt then you won't need to change them but there is no need for all those amps either. Two zones/two larger amps, power is cheap. If you can run wiring for a microphone you can run wiring to connect the speaker sections together and remove the unneeded amps.

Once you do that it will be easy to add your paging mic. to the system. That's how you justify it to your customer and at the same time clean the system up.

-Hal

damn i love this site!! We ran into the same issues at a casino!


9yrs and still green!!

I believe the system was originally zoned, was the reason for the amps???I think twisted pair is on the right page, does anybody see a problem with using the bridging jacks & existing infastructure

Sorry, long post!

We are still trying to find more info on that Executone WMA-35 amp. We believe it is probably made by Bogen but the closest I can find on the web is the WMA-80. This amp uses modules so it may not have a "line-in" module and it doesn't appear to have any bridge or line-out jacks.

The Peavey is on the web and it has those two RCA jacks which are just a summed input (meaning they are resistor wye adapted to mono inside) and no line out jacks.

If they were all Bogen TPU's, everything would be great, but we are dealing with a couple other brands here.

Bogen has the bridge jacks which as I mentioned before, is a two way link, almost like having a line-in and line-out travelling down the same cable. Bogen doesn't recommend it, but I have seen and done it where you take the bridge jack and feed it to a line in on another amp (like the Peavey). Without going into a lot of electronic detail here, it will be a test. It may work fine, or the line in circuitry may short out the bridge jacks causing no sound to carry over.

Here's your steps:

Basically pick a TPU100 and feed the tel page and your new "all call" mic into it (we'll call this our master). Use the mic input on this master for your new mic. It has two screw terminals for a low impedance mic and there is a ground terminal there too (XLR on mic, pins 2 & 3 will go to the screw terminals and pin 1, the shield, will go to ground). Make sure you use a low impedance, balanced mic for this (you mentioned you have to go about 100' for it).

Pick a second TPU and feed only the music into it (either use the RCA jack or the screw terminals), this will be our music zone amp. There are two screw terminals on this amp labelled "mute" and wire the switch from your new mic to these. This will mute the music on this zone when you are using the mic. Note how this is wired, the mic is actually wired to the master amp but the switch from it is wired to the music amp.

Take a RCA patch cord and plug it into one of the bridge jacks on the master. Cut the other plug off, strip the wires and feed them into either tel page or mic input. The bridge jack is actually a high impedance line level and since the music amp only has one high line level jack (the music jack which you are using) you will have to feed it into a lower level jack. The tel page being 600 ohms is probably your best bet but you will have to set that level a little higher on that amp. Do not plug it into the bridge jack on that amp otherwise you will carry the music back to the master which is not what you want.

Use a second RCA patch and from the other bridge jack on the master, patch it to the next TPU and so on with the remainder of the TPU's.

Test everything so far to make sure you have sound.

Now from the last TPU, patch the remaining bridge jack to one of those two music jacks on the Peavey. Test again to make sure this isn't shorting out the bridge jacks.

The Executone will somehow have to be fed as well, but without knowing what it has for inputs, I'm not sure what to tell you. It may be possible to use a wye adapter from that last TPU and feed it to both the Peavey and the Exec, but again, it will be a test.

If wiring it this way shorts out the bridging circuit, you will lose sound and have to make your own line out jacks. This can be done by wiring the following circuit: