Wednesday, July 26, 2017

New VHF Trunking at Lake Mead

On a recent visit to Hoover Dam and Lake Mead, near Las Vegas, I discovered a VHF trunking control channel. It appears to be a two-site VHF P-25 trunked system, likely to cover both the Hoover Dam area and likely the Lake Mead National Recreation Area.

I had  received reports of hearing the control channel from site 2112 on 172.1375 MHz, and I found the control channel for site 2122 on 172.1375 MHz loud and clear at the Hoover Dam via a close call hit on my Uniden 436 scanner. I was unable to pick up the control channel from site 2112 on my visit.

It only shows two sites on the air right now, and no users were seen affiliating or using the system while I was monitoring. Both the Hoover Dam police and Lake Mead NRA operations were on their normal VHF conventional channels.

More information as the system usage increases.

Here is what I found via PRO96COM:

System ID             : A52
WACN                  : BD000
Tower Number (Decimal): 2-122
Tower Number (Hex)    : T027A
Flavor                : Phase 1

#Format: Table ID,Base Freq,Spacing,Input Offset,Assumed/Confirmed,BandWidth,Slots

#Format: Channel,Usage,Frequency(/Slot),Input Channel,Input Frequency(/Slot),Input Explicit(1/0),Hit Count

#Format: TowerID,TowerIDHex,System ID,Channel,Frequency,Tower Name