:: To my ears the noise sounds like it is coming from inside the room with the people talking / partying . ( Something to do with the echoes inside the room and high / low band pass filtering, though I can't say exactly what, gives me that impression ) Can someone confirm it actually was produced from outside the window?
42.
A given provider might have offered service on one, two, or all three bands, although IMTS was never offered on low band ( only MTS, but Whidbey Telephone in Washington State had a custom-designed direct-dial system . ) These were prone to network congestion and interference since a radio closer to the terminal would sometimes take over the channel because of its stronger signal.
43.
As a result, many 4-metre users gain access to the band by using converted " Low band " VHF ex-PMR ( Private Mobile Radio ) transceivers but invariably these only have either AM or FM and those users who prefer to have a multi-mode capability but can't afford a second hand Yaesu FT-847 normally use transverters, either purposely built home builds or sometimes even converted 6-metre or 2-metre versions.
