What is considered Hi-Band?

[Pro-95]

I know silly question, but what frequencies are considered Hi-Band?

 

[crayon]

138 to 174 MHz

 

[Pro-95]

That's what I thought. But I was guessing.

Thanks!

 

[Mick]

30-300 MHz is the VHF High Band:
http://en.wikipedia.org/wiki/Very_high_frequency
http://www.geocities.com/dtmcbride/tech/em-spectrum.html
http://www.qsl.net/aa6j/radiomb/radio3.htm
http://www.vlf.it/frequency/bands.html

 

[N_Jay]

30-300 MHz is the VHF High Band:
http://en.wikipedia.org/wiki/Very_high_frequency
http://www.geocities.com/dtmcbride/tech/em-spectrum.html
http://www.qsl.net/aa6j/radiomb/radio3.htm
http://www.vlf.it/frequency/bands.html

NO, 30 to 300 is the entire VHF band

 

[radioscan]

30 - 50 MHz = VHF Low Band
138 - 174 MHz = VHF Hi Band

 

[Voyager]

30 - 50 MHz = VHF Low Band
138 - 174 MHz = VHF Hi Band

72-76 MHz = Mid Band

Joe M.

 

[INDY72]

Andddd 1.0 MHz to 30.0 MHz is HF, the other portion is expressed in KHz.... Thus- 1-30=HF, 30-50=VHF Lo, then da midband, aviation band, then VHF Hi, then you enter UHF.... UHF-T, UHF Hi *700/800/900 MHz*... EHF.... then the 1300-1500 band.

And I forgot to add in the 5 HAM bands.. as they if I remember right,... consider those as seperate spectrum?

 

[K5MAR]

The ham bands are still considered portions of the main divisions. BTW, I'd add 4 MHz to the VHF-low - 30-54 MHz.

Mark S.

 

[INDY72]

OK.. cause I left the HAM 50-54 out... Now anyone want to tackle ULF???? or ELF????? :roll:

 

[K5MAR]

Ummm, no!

Mark S.

 

[N_Jay]

The spectrum

 

[N_Jay]

And another


Legend:

γ = Gamma rays
HX = Hard X-rays
SX = Soft X-Rays
EUV = Extreme ultraviolet
NUV = Near ultraviolet
Visible light
NIR = Near infrared
MIR = Moderate infrared
FIR = Far infrared

Radio waves:
EHF = Extremely high frequency (Microwaves)
SHF = Super high frequency (Microwaves)
UHF = Ultrahigh frequency
VHF = Very high frequency
HF = High frequency
MF = Medium frequency
LF = Low frequency
VLF = Very low frequency
VF = Voice frequency
ELF = Extremely low frequency

 

[INDY72]

And the man wit da plan comes to da rescue.... :shock: :twisted:

 

[N_Jay]

Google is your friend!

Google {UHF VHF HF LF VLF Chart}

 

[PhilJSmith67]

The electromagnetic spectrum charts are cool and all, but in reference to the original question, I assume the context was what law enforcement/EMS/local government refer to as "High Band."

Typically, the 150 - 160 MHz range (in VHF-High) is what most agencies refer to as High Band. The Illinois State Police refer to this range as either "High Band" or "HFn" where "n" equals a channel number (HF1, HF4, etc.). This would of course never be confused with "HF" in the radio spectrum which refers to the 3 to 30 MHz segment. ISP refers to VHF-Low frequencies as Low Band or LFn, but they're still in the VHF segment.

Of course, on an agency-by-agency basis you never can guess what their nomenclature is. A police department where most of their comms are at 460 MHz might refer a frequency at 155 MHz as Low Band or LF, just because the frequency is in a lower band. I know of one PD that calls their car-to-car simplex channel "Band 2" even though their "Band 1" repeater is in the same band, along with the repeater input.