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AM Transmitter site
Intro
The transmitter is a new, state-of-the-art, HD AM transmitter .
Location, phone, ISDN
On the grounds of Denver Drywall and of a tree nursery.
Phone: 303-789-2509
ISDN:
Denver: 303-789-5217, 303-789-5238
(For your reference, the numbers it calls in Boulder are 303-442-1908, 303-442-3937)
Address:
3251 S. Zuni St.
Englewood, CO 80110-1965
map
As far as Xcel Energy is concerned, the address is actually: 3190 S Wyandot St
There's a set of keys at KGNU: SecretInfo
One key is for the street side gate (if after hours) and for the fence surrounding the site
One key is for the transmitter shack
Access is through the tree nursery (entrance on Zuni or, if open, north gate on Darmouth Ave)
Access through Denver Drywall (entrance on Zuni)means having togo througha gated fence
After-hours access is harder.
DEADLY VOLTAGES ON TRANSMITTER TOWER: DO NOT APPROACH IT!
Contacts
Mike Pappas, engineer 303-988-0976 (W), 1-800-351-1529 303-807-5619 (C) mpappas AT qwest DOT net
Will Barnett
Davide Andrea,engineer 303-413-1500 1davide at att dot net
Block diagram
ISDN line --> AM transmitter --> Tuner --> AM tower --> AM receiver --> ISDN line
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||
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phone (303-789-2509) --> Remote Control
Remote control
The transmitter is controlled remotely through any phone. You dial in touch-tone codes, and the controller responds with a synthetic voice (shown as 'response' below).
Dial 303-789-2509
5 rings
'Please enter your password, followed by pound key.'
Enter the access code: see the SecretInfo page
Follow the voice commands
To turn off the transmitter, for example as ordered by the FCC, do: 2 # 06 # Press 1 # to hear the status of some channel
01 RF ON
02 Exciter B on
03 High power
04 Low power
05 RF Ready
06 RF Alarm
07 Shutback
08 Cutback
09 Interlock open
Press 2 # to control the transmitter
01 High Power
02 Low Power
03 Exciter HD Radio On
04 Exciter HD Radio Off
05 RF On
06 RF Off
07 Power increase
08 Power decrease
09 Transmitter reset
Press 3 # to hear the analog reading of some channel
01 AC volts (normal 110 to 120)
02 Temperature
03 Humidity
04 Fan RPM
05 Fwd power Percentage (need to be reset as it is really 100%)
06 Fwd power kilowatts (need to be reset as it is really 5 KW)
07 Reflected power kilowatts
Press 5 # to disconnect
Transmitter Log
Troubleshooting
Occasionally the ISDN link between the KGNU studios and the transmitter site goes down.
Go to the TeckRoom
Find the Master Control rack (first thing you see when you walk in)
Find the ZEPHYR unit for the AM (it has a sign saying "AM are we on the air?"
Press the Auto button twice in quick succession
Maintenance
Always fill the Transmitter Log
