Outer Limits 4x4 Board

Question is in the title !!

Cheers

Heath

answer is two letters......NO

"CB" (meaning the old 27Mhz system from the 70-80's) can not be made to work with the newer "UHF" 477Mhz system. Quite literally it is like trying to use an am radio to recieve JJJ FM (or visa versa). Two totally different transmission systems on two totally different frequency ranges.

UHF is still in the "citizens band" (CB), and the old 27MHz is the same, CB is just the commen name for 27MHz radio's.


But no, they wont work together.

mickyd555 wrote:UHF is still in the "citizens band" (CB), and the old 27MHz is the same, CB is just the commen name for 27MHz radio's.


But no, they wont work together.

WRONG!!!!!

To be absolutely precise:

HF: 3-30 Mhz (including the 27 Mhz old am "cb" band, using am/ssb modulation)
VHF: 30-300 Mhz (includes most VHF tv channels, 2, 7, 9, and 10, and fm radio stations)
UHF: 300-3000 Mhz (including 477 Mhz UHF "cb" radio band, using fm modulation, most mobile phone services, Microwave oven)

They are NOT the same, both in frequency and modulation type. They operate on two different "cb" frequency bands.

Ooh! Arguing semantics! Can I play?

I think micky was trying to point out that both the 27MHz and 477MHz systems are technically "Citizens Band." Not the same band, but the term CB can be applied to both.

But I agree with Gary that "CB" typically means the 27MHz AM system, and people typically use "UHF" for the 477MHz FM system.

So. CB and UHF - completely different.

Cheers,

Scott

NJ SWB wrote:Ooh! Arguing semantics! Can I play?

I think micky was trying to point out that both the 27MHz and 477MHz systems are technically "Citizens Band." Not the same band, but the term CB can be applied to both.

But I agree with Gary that "CB" typically means the 27MHz AM system, and people typically use "UHF" for the 477MHz FM system.

So. CB and UHF - completely different.

Cheers,

Scott

thankyou scott, that is exactly what i was tyrying to say, have you never heard the term UHF CB.........

in saying that, i could be wrong, but that is my understanding. AFAIK, commercial 2 ways run in the citizens band aswell, but i know you have to pay for that????

its actually illegal for "comercial 2 ways" to operate on cb frequencies.
although a lot of people do it because they dont want to pay for a frequency to use so they just pick a frequency that they feel like use a subtone and annoy the shit out of repeater users
highly illegal but nothing will be done about it because the ACA dont give a shit.

j-top paj wrote:its actually illegal for "comercial 2 ways" to operate on cb frequencies.
although a lot of people do it because they dont want to pay for a frequency to use so they just pick a frequency that they feel like use a subtone and annoy the shit out of repeater users
highly illegal but nothing will be done about it because the ACA dont give a shit.

Depends on how you split the hairs. A business is allowed to use CB radio (either UHF or 27MHz). However, they are NOT (for that matter no-one is) allowed to use a commercial radio in the CB bands. This is because a commercial radio does is not licensed (type-approved) to run in the CB bands.

It is a common belief that a business is not allowed to use a cb radio in the running of their business and that is wrong. However, a business is NOT allowed to claim a channel as "theirs".

HTH, Dean[/quote]

Tas_Dean wrote:

j-top paj wrote:its actually illegal for "comercial 2 ways" to operate on cb frequencies.
although a lot of people do it because they dont want to pay for a frequency to use so they just pick a frequency that they feel like use a subtone and annoy the shit out of repeater users
highly illegal but nothing will be done about it because the ACA dont give a shit.

Depends on how you split the hairs. A business is allowed to use CB radio (either UHF or 27MHz). However, they are NOT (for that matter no-one is) allowed to use a commercial radio in the CB bands. This is because a commercial radio does is not licensed (type-approved) to run in the CB bands.

It is a common belief that a business is not allowed to use a cb radio in the running of their business and that is wrong. However, a business is NOT allowed to claim a channel as "theirs".

HTH, Dean

The main criteria is that it not be more than 5 Watts power to the rf stages. "Commercial" radios are OK if the restrict their power to 5 Watt.

NJ SWB wrote:Ooh! Arguing semantics! Can I play?

I think micky was trying to point out that both the 27MHz and 477MHz systems are technically "Citizens Band." Not the same band, but the term CB can be applied to both.

But I agree with Gary that "CB" typically means the 27MHz AM system, and people typically use "UHF" for the 477MHz FM system.

So. CB and UHF - completely different.

Cheers,

Scott

I don't like it, to quote Pauline Pantsdown.

There are a number of stores selling UHF handheld radios on the 433Mhz band (which is right in the middle of the 70cm Ham band). While technically not legal, they get away with it as LIPDs (Low Interference Potential Devices). I have seen a few people get caught out buying these and find they can't talk to their mates....classic argument for being pedantic about terminology.

AJFeroza wrote:I don't like it, to quote Pauline Pantsdown.

There are a number of stores selling UHF handheld radios on the 433Mhz band (which is right in the middle of the 70cm Ham band). While technically not legal, they get away with it as LIPDs (Low Interference Potential Devices). I have seen a few people get caught out buying these and find they can't talk to their mates....classic argument for being pedantic about terminology.

Can you name any brands? I've been thinking about buying a few of the cheaper handheld UHFs - I guess I'll have to read the specs carefully before I spend.

Scott

They're usually no-name brands. Dick Smith used to sell 'em, but I believe they stopped. Just be careful of the cheapies from places that don't normally sell that kinda thing.

Uniden UHF CBs are available in pairs for a reasonable price.