programing in 70cm simplex freq

[bill4long]

For example 446.500 may be a good simplex frequency in CA but in TX it is a repeater input.

Same for Indiana.

 

[Ghstwolf62]

I guess Texas and Indiana might want to change then because 446.500 is Nationwide Digital Simplex Channel 2
1. 441.100
3. 446.075
4. 443.450 (mostly Europe)

 

[kayn1n32008]

443.450 (mostly Europe)

European amateurs do not have access to 440-450MHz


Sent from my iPad using Tapatalk

 

[bill4long]

I guess Texas and Indiana might want to change then because 446.500 is Nationwide Digital Simplex Channel 2

Says who?

 

[nd5y]

I guess Texas and Indiana might want to change then because 446.500 is Nationwide Digital Simplex Channel 2

Who proclaimed it that?
It isn't in the Texas VHF FM Society 70 cm band plan and there are at least three repeaters coordinated in Texas on 441.5/446.5
Texas VHF-FM Society

 

[Ghstwolf62]

European amateurs do not have access to 440-450MHz


Sent from my iPad using Tapatalk

My apologies I hit the wrong number button.

Its 433.450

 

[Ghstwolf62]

Says who?

I guess whoever decides these things. I'm only quoting from a big site. Its part of DMR-MARC and is called DCI

The nationwide digital simplex channels are for ALL digital modes not just DMR but here is the link. Its at the bottom of the page.



National Digital Simplex Frequencies (12.5Khz or less) (Latest Info)
UHF: 1) 441.0000 2) 446.5000 3) 446.0750 and 4-Europe) 433.450
VHF: 1) 145.7900 2) 145.5100
Color Code 1, Talkgroup 99, Always (Timeslot 1 if your radio is capable of "2 slot simplex")

DCI IPSC Network - Repeater List and Information

 

[Ghstwolf62]

Who proclaimed it that?
It isn't in the Texas VHF FM Society 70 cm band plan and there are at least three repeaters coordinated in Texas on 441.5/446.5
Texas VHF-FM Society

See the link above.

Nationwide I would think means nationwide which is the point of it being designated such.

I will freely admit I don't know how such things are done but I would think logically that no such designation would be issued without it being meant to be exactly that.

Locals not complying would be a problem and again I don't know how those things are set up and resolved etc.

But I have those four in my radio and it would lock out any analog traffic so using them as designated if in an area that is not using them correctly would cause problems I think.

Needless problems but problems.

I don't think a lot of people traveling around are going to even think to look up and see if everybody is playing by the rules but instead go with what is said to be and operate accordingly.

As I said I may be wrong in my thoughts about it but it is a designated digital simplex frequency.

 

[zz0468]

See the link above.

Nationwide I would think means nationwide which is the point of it being designated such.

The organization providing your link above is not an authoritative, or recognized frequency coordinator. So, any frequencies they list may be considered "suggestions", and could be perfectly acceptable in some areas, and smack dab on someone's repeater input in another.

I will freely admit I don't know how such things are done but I would think logically that no such designation would be issued without it being meant to be exactly that.

Think again.

A brief rundown on how frequency coordination, and how these things are designated would be in order...

Nationally, the ARRL has established band plans. These bandplans are determined using input from amateurs nationwide. I recently participated in some discussions that will eventually evolve into formal band plans. So, in a manner of speaking, it's a democratic process.

Locally, frequency coordinators are created (by whatever method the locals settle on), but usually started with open meetings of concerned area amateurs many years ago. Most local frequency coordinators are members of the National Frequency Coordinators Council (NFCC), which exists to provide a common nationwide focal point for amateur frequency coordinating issues.

The FCC recognizes NFCC and it's member local coordinators in matters concerning bandplans and repeater frequency coordination.

It is the local frequency coordinators and the ARRL band plan committees that determine what specific frequencies are designated for what purpose. Compliance is all voluntary, until someone runs afoul of the local bandplans and creates an FCC issue. Then, the side following local bandplans prevails.

As I said I may be wrong in my thoughts about it but it is a designated digital simplex frequency.

Not by ARRL bandplans, and not by many local bandplans. So, caveat emptor on that one. It would behoove anyone operating on ANY of the VHF/UHF/SHF bands to understand what's locally acceptable before firing up a transmitter.

 

[Ghstwolf62]

Well I can't argue with you on what you said. I don't know enough and I'll freely admit that.

Regardless it still doesn't make sense the largest digital organization in the country and possibly the world would just pull this out of their a$$.

Maybe they did exactly that but it doesn't make sense if so.

I guess it'll just be user beware then.

 

[AK9R]

Regardless it still doesn't make sense the largest digital organization in the country and possibly the world would just pull this out of their a$$.

Posted directly under their list of "recommended" simplex frequencies:

It is recommended that you contact the local area coordinating councils when using our recommended simplex frequencies to insure an interference free session.

Also, DMR-MARC seems to have a lot more repeaters listed than DCI.

 

[Ghstwolf62]

Posted directly under their list of "recommended" simplex frequencies:



Also, DMR-MARC seems to have a lot more repeaters listed than DCI.

Okay.

Also DCI is part of DMR-MARC from what I've seen which is why I thought having NW freqs if everyone was not observing them could lead to problems. If DCI is not part of they are at least closely related and joined. People look at three main interlinked, interrelated sites and these are two of those three. The other being Norcaldmr.org.

Either way I'll accept I've been appropriately schooled and leave off it.

 

[k6cpo]

OMG, if you have an Amateur Radio Licence then that info on frequencies was covered in even the Basic licence exam. Really I can't believe that people are that lazy to not even look it up or try for sake. most of the asking in the receivers sections is the same way.....Just try looking up some information first.

Wow I can see your a total *** hole right off the bat... and I can see you have no idea how to read the first post or any of my following posts... I listed what freq i was planing to use and I was asking for clarification... lucky not every one is like you and helped me out I did fined the info my self but seeing there is no clear cut defined boundaries in 70cm I needed some help..

Do we really need the nastiness and name calling? Whatever happened to the amateur radio tradition of "Elmering?"

I have a nice little guide published by Nifty Accessories of Escondido, CA. It lists all the band plans from 160 meters through 70 centimeters. It also lists 22 specific simplex frequencies for the 70 CM band:

445.9125 445.9250 445.9375 445.9500 445.9625
445.9750 445.9875 446.0000 446.0125 446.0250
446.0375 446,0500 446.0625 446.0750 446.0875
446.1000 446.1125 446.1250 446.1375 446.1500
446.1625 446.1750

Nifty Ham Radio operating guides, books, desk stands and other accessories

 

[zz0468]

I have a nice little guide published by Nifty Accessories of Escondido, CA. It lists all the band plans from 160 meters through 70 centimeters. It also lists 22 specific simplex frequencies for the 70 CM band:

Garbage. Your frequency list is garbage. First off, Southern California is using 20 KHz spacing. Second, your list shows frequencies on 12.5 KHz spacing. Third, in Southern California, those frequencies are near or on repeater outputs. In may parts of the rest of the country, they are in or near repeater inputs.

I haven't a clue where someone would have gotten the idea any of those frequencies, except 446.000, is usable as a simplex frequency. Run, don't walk, to your nearest trash bin and throw it away. Now.

 

[k6cpo]

Garbage. Your frequency list is garbage. First off, Southern California is using 20 KHz spacing. Second, your list shows frequencies on 12.5 KHz spacing. Third, in Southern California, those frequencies are near or on repeater outputs. In may parts of the rest of the country, they are in or near repeater inputs.

I haven't a clue where someone would have gotten the idea any of those frequencies, except 446.000, is usable as a simplex frequency. Run, don't walk, to your nearest trash bin and throw it away. Now.

Don't complain at me. You need to take it up with the individual who produces the guide. I included the website address in my post...

 

[zz0468]

Don't complain at me. You need to take it up with the individual who produces the guide. I included the website address in my post...

I'm sorry... I wasn't coming down on you personally. I was just trying to emphatically state that the information in that book is no good.

 

[k6cpo]

I'm sorry... I wasn't coming down on you personally. I was just trying to emphatically state that the information in that book is no good.

Accepted... Perhaps the next time I see the individual that markets these, I'll ask him about it. We have a big convention coming up in San Diego next month and since he's local, it's likely he'll have a booth.

All of his other products are excellent, especially the little pocket guides for HTs.

 

[mikewazowski]

Okay.



Also DCI is part of DMR-MARC from what I've seen which is why I thought having NW freqs if everyone was not observing them could lead to problems.



Either way I'll accept I've been appropriately schooled and leave off it.

DCI and DMR-MARC are two separate organizations.

They do have a few linked DMR groups but that's it.