Search found 69 matches

by abwdvm
Sun Nov 12, 2017 2:56 pm
Forum: Ask the Engineers
Topic: Removed ye old Transmitter Monitor/Control
Replies: 3
Views: 571

Re: Removed ye old Transmitter Monitor/Control

Mouse Poop reduces eddy currents
by abwdvm
Sat Nov 11, 2017 5:17 pm
Forum: Ask the Engineers
Topic: Convert to LEDs, or leave 110v?
Replies: 10
Views: 1190

Re: Convert to LEDs, or leave 110v?

Lighted "Stand By" sign.

12v relay activated when silence alarm goes off

Sits on top of the main rack.
by abwdvm
Sat Nov 11, 2017 1:50 pm
Forum: Ask the Engineers
Topic: Convert to LEDs, or leave 110v?
Replies: 10
Views: 1190

Convert to LEDs, or leave 110v?

I'm thinking of replacing the 110v bulb with some LED's.
by abwdvm
Sat Nov 11, 2017 1:46 pm
Forum: Ask the Engineers
Topic: Removed ye old Transmitter Monitor/Control
Replies: 3
Views: 571

Removed ye old Transmitter Monitor/Control

One of the last pieces of 'home brew' equipment from the AM Side. We think that station founder made this and used it on this AM station since around the 50's.

During my short time here, all it did was serve as a silence detector.
by abwdvm
Mon Nov 06, 2017 11:02 am
Forum: STL Engineering
Topic: Anyone want to come and realign our STL?
Replies: 1
Views: 757

Anyone want to come and realign our STL?

At the radio shack...
reciever.jpg
I'll buy ya a coke if you come climb the transmitter tower and move our receiver antenna to link up our recently relocated studio...

We are just 2 hours east of Dallas.
by abwdvm
Tue Oct 31, 2017 7:41 pm
Forum: Ask the Engineers
Topic: What might this unit be for?
Replies: 6
Views: 719

What might this unit be for?

https://photos.app.goo.gl/4PF1ryqDi4UTecj53

Removed from service years ago. AM Station.
by abwdvm
Tue Oct 31, 2017 7:07 pm
Forum: Ask the Engineers
Topic: Will this STL link work?
Replies: 3
Views: 493

Will this STL link work?

Completely out of my league here.. We are moving an existing Nicom 9XX STL link.

This is a plot of the new proposed location. Anyone want to hazard a guess if it will work?
stl.jpg
by abwdvm
Tue Oct 31, 2017 7:04 pm
Forum: Ask the Engineers
Topic: Wanna Play "Guess What's in the Grey Box?"
Replies: 16
Views: 1814

Re: Wanna Play "Guess What's in the Grey Box?"

There are 2 DPDT relays inside..... EAS control. Thanks for playing
by abwdvm
Tue Oct 17, 2017 2:13 pm
Forum: Ask the Engineers
Topic: Wanna Play "Guess What's in the Grey Box?"
Replies: 16
Views: 1814

Wanna Play "Guess What's in the Grey Box?"

Taken at a nearby radio station. Going to be my responsibility soon.
by abwdvm
Tue Oct 17, 2017 2:04 pm
Forum: Ask the Engineers
Topic: EAS911 Unit, trying to understand relay closures
Replies: 1
Views: 314

EAS911 Unit, trying to understand relay closures

I have been tasked with revamping the EAS relays.

We have an EAS911 unit.

I cant figure out why there are 2 wires, one carrying 36vdc from the transformer, and one that is grounded.
by abwdvm
Mon Feb 08, 2016 4:13 pm
Forum: Everything else
Topic: Asking for any and all info on this unit please
Replies: 3
Views: 1012

Re: Asking for any and all info on this unit please

Another pic https://www.dropbox.com/s/ids9h1nfee99lhc/reg1.jpg?dl=0 Once I turned it on, it makes clicks, etc, and the voltage moves slightly back and forth with changing loads. Looks like nothing is connected to LINE C, and Line A seems broken as all it does is click, and no voltage change is regis...
by abwdvm
Mon Feb 08, 2016 11:55 am
Forum: Everything else
Topic: Asking for any and all info on this unit please
Replies: 3
Views: 1012

Asking for any and all info on this unit please

https://www.dropbox.com/s/4dcy1d6pi7fc3j0/Reg.jpg?dl=0 This is connected after a breaker, and before the 'Rack". We all assumed this protected the transmitter, and it may have when the old transmitter was used. Now it is connected to the equipment in rack in engineering. Orban 9200, DA, Computers, E...
by abwdvm
Mon Jul 20, 2015 7:34 pm
Forum: AM Radio
Topic: indicators will go LOW (0 volts dc) ?
Replies: 7
Views: 1240

Re: indicators will go LOW (0 volts dc) ?

http://pdf.datasheetcatalog.com/datashe ... 828_DS.pdf

So one chip could control up to 8 lights? I could use existing 28v dc power supply, and all the old 28PSB Miniature Incandescent Lamps/Bulbs indicators?
by abwdvm
Mon Jul 20, 2015 7:07 pm
Forum: AM Radio
Topic: indicators will go LOW (0 volts dc) ?
Replies: 7
Views: 1240

Re: indicators will go LOW (0 volts dc) ?

[ The remote indication functions: 1) require current limiting resistors and 2) provide up to 100 mA
for indicators. A +5 volt supply is provided on the ECU rear-panel for remote control
operations. The remote control connections are located on the rear-panel of the ECU. ]


Sound right?
by abwdvm
Mon Jul 20, 2015 6:31 pm
Forum: AM Radio
Topic: indicators will go LOW (0 volts dc) ?
Replies: 7
Views: 1240

indicators will go LOW (0 volts dc) ?

[The power level status indicators will go LOW (0 volts dc) when activated. ]

Does this mean that once the 1000w transmitter is set to 1000w, then the 1000w indicator circuit will no longer produce +5v?