HFU HF Underground

Loggings => 10/11 meters => Topic started by: R4002 on July 27, 2018, 1256 UTC

Title: 29790 kHz FM 29.79 MHz NFM Van Pool Transportation WQMA652 27 July 2018
Post by: R4002 on July 27, 2018, 1256 UTC

FM mode, NFM technically - Commuter van dispatcher traffic - fading in and out with readable CTCSS or PL tones 100.0 Hz and 151.4 Hz decoding on the Pro-96 scanner with 26-30 MHz lowband mobile antenna using a Chevrolet ground plane ;)

Van Pool Transportation operates a massive linked repeater system in Massachusetts, see licenses under:

WQMA652 - http://wireless2.fcc.gov/UlsApp/UlsSearch/license.jsp?licKey=3206157 (http://wireless2.fcc.gov/UlsApp/UlsSearch/license.jsp?licKey=3206157) (29.790 MHz, 30.680 MHz and 31.060 MHz)

WQPU857 - http://wireless2.fcc.gov/UlsApp/UlsSearch/license.jsp?licKey=3403524 (http://wireless2.fcc.gov/UlsApp/UlsSearch/license.jsp?licKey=3403524) (30.660 MHz, 30.720 MHz, 30.740 MHz, 30.760 MHz, 30.820 MHz, 31.120 MHz and 31.480 MHz)

According to the license, they're transmitting 220 watts ERP on 29790 kHz FM - the system apparently uses both 100.0Hz and 151.4Hz CTCSS tones and the mobiles transmit on various 35 MHz repeater input frequencies.  Who needs digital trunking when you have high power lowband FM? 

Title: Re: 29790 kHz FM 29.79 MHz NFM Van Pool Transportation WQMA652 27 July 2018
Post by: TheRelayStation on July 27, 2018, 2003 UTC

interesting.
thats just a bit above the 10 meter ARO FM repeaters.
http://www.qsl.net/kc4qlp/10meterrepeater.html
never expected something to be licensed just below 30Mhz and just above the ARO 10 meter FM repeaters.
good catch !

Title: Re: 29790 kHz FM 29.79 MHz NFM Van Pool Transportation WQMA652 27 July 2018
Post by: R4002 on July 27, 2018, 2109 UTC

Indeed.  29710, 29730, 29750, 29770 and 29790 are all available for use as part of the Business Radio Service under Part 90 of the FCC Rules - for land mobile radio services.  The 29800-30000 portion's allocation is apparently military/government...the next available land mobile frequency after 29.790 MHz is 30.580 MHz.  The 25-30 MHz region is quite fascinating!

Title: Re: 29790 kHz FM 29.79 MHz NFM Van Pool Transportation WQMA652 27 July 2018
Post by: skeezix on July 28, 2018, 0022 UTC

Quote from: R4002 on July 27, 2018, 1256 UTC

Who needs digital trunking when you have high power lowband FM?

Got that right.

Title: Re: 29790 kHz FM 29.79 MHz NFM Van Pool Transportation WQMA652 27 July 2018
Post by: Rob. on July 28, 2018, 1206 UTC

These vans and buses are all over my area. The can be spotted a mile away due to the large low band antenna on their roof. Very solid system as this area is full of hills and valleys that limit higher frequency use in some places.