DUAL-BAND MURS Radios??? Would you buy one?

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KN6SD

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techman210 said:
Nothing really "new" has been presented here other than a couple of RX-only channels for Government to broadcast on, and of course, another band.

I'm wondering how much experience the OP has with VHF lowband propagation. He's not telling us of any. He also wants 11K0F3E modulation in a band that is exempt from narrowbanding requirements. And the NB mandate created other problems, such as reduced range, and didn't solve any problems. The mention of "4 watts RMS" indicates a certain misunderstanding of how power is measured in a FM carrier.

What would be new, would be to incorporate some selective, group-call and "all call" system within the radio. Also, you could make it a SDR-based radio which would scan the band and make a histogram of channel usage. All radios would monitor a simplex "control channel" and when a call is made, a transmission would go out and a channel assignment to a voice channel would be announced. Selcall to one unit, a handshake would happen before a assignment would be made. If the modulation was TDMA, then the SDR would have the ability to constantly scan the available channels between timeslots, keeping the histogram updated, especially important in a mobile environment. Japan did this with their analog, simplex FM 900 MHz CB service in the mid-80's.

A quieter band needs to be selected. Take a 500 KHz segment from the 220-222 MHz band from underutilized commercial use. It will be quieter, and the antennas more efficient. HT's would be usable. Make it also IP so base stations could be attached to a 900 MHz FHSS mesh router to allow some recoverable WAN connections over a wider geographical area.

THAT would be new.
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And who are you that I need to "Qualify" my experience and ideas to???
 
K

KN6SD

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techman210 said:
What would be new, would be to incorporate some selective, group-call and "all call" system within the radio. Also, you could make it a SDR-based radio which would scan the band and make a histogram of channel usage. All radios would monitor a simplex "control channel" and when a call is made, a transmission would go out and a channel assignment to a voice channel would be announced. Selcall to one unit, a handshake would happen before a assignment would be made. If the modulation was TDMA, then the SDR would have the ability to constantly scan the available channels between timeslots, keeping the histogram updated, especially important in a mobile environment. Japan did this with their analog, simplex FM 900 MHz CB service in the mid-80's.

THAT would be new.
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That idea would increase cost and decrease reliability...… So not such a hot idea for a basic consumer radio service...
 
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KN6SD

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nd5y said:
You don't seem to understand that even though your proposals are positive they will never happen because the FCC, NTIA and DoD will never reallocate spectrum for something like that.
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And you know this how???
 
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a417

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KN6SD said:
I have noticed lots of folks on the forums seem to be threated by mere suggestions of a new service. Most offer little constructive input, and some are downright rude. Probably because THEY DIDN'T Think of it...…. ha ha ha ha
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Who is threatened? You apparently are.

Who is giving you constructive feedback to your ideas? Almost everyone else.

Who has a snappy comeback for every piece of constructive feedback given? You have.
 
K

KN6SD

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KevinC said:
And with that we're done.
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Yep, you killed any future debate about the subject... This is one more reason I don't do the web much anymore, to many folks have little tolerance for new ideas...
 
AK9R

AK9R

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KN6SD said:
Would you spend your hard earned dollars on a dual-band MURS Radio?
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No.
KN6SD said:
Here's my idea for an expanded MURS service that everyone could enjoy.
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Have you submitted this proposal to the FCC?
KN6SD said:
So much for freedom of expression online...….
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You are entitled to your opinion. That said, the 1st Amendment to the U.S. Constitution states "Congress shall make no law...abridging the freedom of speech..." This forum is a private enterprise. The owner of this forum, not Congress, sets the rules of conduct in this forum.
 
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techman210

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KN6SD said:
And who are you that I need to "Qualify" my experience and ideas to???
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I'm someone that has a lot more industry experience than I believe you have.

You ask for input, and when you don't like the answers, or don't like the constructive input, you lash out. That happened on the other website that you promoted this idea on, and the mods admonished you for it.

You can plug numbers into a freeware or an industry standard propagation program all day long, but without knowing the natural environment that you will be operating in, it's all subjective information. If RF engineering were that easy, then anyone could do it. :)
 
K

KN6SD

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W9BU said:
You are entitled to your opinion. That said, the 1st Amendment to the U.S. Constitution states "Congress shall make no law...abridging the freedom of speech..." This forum is a private enterprise. The owner of this forum, not Congress, sets the rules of conduct in this forum.
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I know that, I just wanted someone from Radio Reference to admit it... This is a "NO FREE SPEECH ZONE"...…. Have a nice weekend :)
 
K

KN6SD

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techman210 said:
You can plug numbers into a freeware or an industry standard propagation program all day long, but without knowing the natural environment that you will be operating in, it's all subjective information. If RF engineering were that easy, then anyone could do it. :)
Click to expand...

Okay, but it will give me a general idea about performance over average terrain, will it not?
 
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