Home |
Search |
Today's Posts |
|
#1
![]() |
|||
|
|||
![]()
Buzzygirl wrote:
"Greg and Joan" wrote: But anyway, IIRC, somebody's idea was to allow novices voice privileges on 902 Mhz, and it was not considered seriously , and one of the reasons cited was safety. There is still no commercially-available equipment for the 902 MHz amateur band that I am aware of. Using commercially-available equipment is cheating anyway. What does it take to modify PCS cellular phone firmware for digital communication on 902? Is it just a matter of firmware or isn't the RF section able to tune that far out of band? --scott -- "C'est un Nagra. C'est suisse, et tres, tres precis." |
#2
![]() |
|||
|
|||
![]() "Scott Dorsey" wrote in message ... Buzzygirl wrote: "Greg and Joan" wrote: But anyway, IIRC, somebody's idea was to allow novices voice privileges on 902 Mhz, and it was not considered seriously , and one of the reasons cited was safety. There is still no commercially-available equipment for the 902 MHz amateur band that I am aware of. Using commercially-available equipment is cheating anyway. What does it take to modify PCS cellular phone firmware for digital communication on 902? Is it just a matter of firmware or isn't the RF section able to tune that far out of band? --scott could be things have changed without me noticing but i dont think digital PSC type stuff is allowed for hams... maybe in experimantal bands? in the poplar comm freqs it just FM, ssb, AM, CW, a little FSK, some packet, a little SSTV, some full TV (usully in conjuction with emergancy support operations) anything encrypted or encoded was a big no-no |
#3
![]() |
|||
|
|||
![]()
There is still no commercially-available equipment for the 902 MHz amateur
band that I am aware of. Using commercially-available equipment is cheating anyway. What does it take to modify PCS cellular phone firmware for digital communication on 902? Is it just a matter of firmware or isn't the RF section able to tune that far out of band? Think of it this way. When you have an FM broadcast antenna and transmitter, it makes quite a difference when switching within the same band from 88 Mhz to 100 Mhz. (only 12 Mhz) Now you want to take something from around 850 Mhz to 902 Mhz (52 Mhz difference) Plus the higher up you go, the more critical the circuitry. Even in the 440 band you are already dealing with microsurgery when using the miniature surface mount components. Besides, working with microwaves is never a good idea. Might as well just take up smoking cigarettes instead. I would play with mercury and use lead paint in my home no problem, but I would not ever build a transmitter and use microwave frequencies. |
#4
![]() |
|||
|
|||
![]() "Truth" wrote in message ... There is still no commercially-available equipment for the 902 MHz amateur band that I am aware of. Using commercially-available equipment is cheating anyway. What does it take to modify PCS cellular phone firmware for digital communication on 902? Is it just a matter of firmware or isn't the RF section able to tune that far out of band? Think of it this way. When you have an FM broadcast antenna and transmitter, it makes quite a difference when switching within the same band from 88 Mhz to 100 Mhz. (only 12 Mhz) Now you want to take something from around 850 Mhz to 902 Mhz (52 Mhz difference) yes but 88 to 100 = 12 percent of final freq 850 to 902 is only 5.765 per cent Plus the higher up you go, the more critical the circuitry. Even in the 440 band you are already dealing with microsurgery when using the miniature surface mount components. Besides, working with microwaves is never a good idea. Might as well just take up smoking cigarettes instead. I would play with mercury and use lead paint in my home no problem, but I would not ever build a transmitter and use microwave frequencies. |
#5
![]() |
|||
|
|||
![]() "Truth" wrote in message ... There is still no commercially-available equipment for the 902 MHz amateur band that I am aware of. Using commercially-available equipment is cheating anyway. What does it take to modify PCS cellular phone firmware for digital communication on 902? Is it just a matter of firmware or isn't the RF section able to tune that far out of band? Think of it this way. When you have an FM broadcast antenna and transmitter, it makes quite a difference when switching within the same band from 88 Mhz to 100 Mhz. (only 12 Mhz) Now you want to take something from around 850 Mhz to 902 Mhz (52 Mhz difference) Plus the higher up you go, the more critical the circuitry. Even in the 440 band you are already dealing with microsurgery when using the miniature surface mount components. pretty might the same for all hand held electronics these days Besides, working with microwaves is never a good idea. everyone has to have a hobby... 900 MHz are NOT microwaves (we call it microwave in brroadcast, but it is a slang term for high UHF) Might as well just take up smoking cigarettes instead. I would play with mercury and use lead paint in my home no problem, but I would not ever build a transmitter and use microwave frequencies. gunplexers are friendly... bi-directional line-of-sight audio |
#6
![]() |
|||
|
|||
![]()
900 MHz are NOT microwaves
Interesting. Especially since the older microwave ovens operated on 800 and 900 Mhz. Why are people who are uneducated in certain subjects always the first to jump in on a conversation and tell everyone else how they think things really are? |
#7
![]() |
|||
|
|||
![]()
Truth wrote:
900 MHz are NOT microwaves Interesting. Especially since the older microwave ovens operated on 800 and 900 Mhz. Why are people who are uneducated in certain subjects always the first to jump in on a conversation and tell everyone else how they think things really are? Because they want to appear educated. |
#8
![]() |
|||
|
|||
![]() "Truth" wrote in message ... 900 MHz are NOT microwaves Interesting. Especially since the older microwave ovens operated on 800 and 900 Mhz. Why are people who are uneducated in certain subjects always the first to jump in on a conversation and tell everyone else how they think things really are? ref http://www.naval.com/radio-bands.htm ref http://chemindustry.intota.com/multi...ve%20frequency ref http://www.k5rmg.org/A-soup.html in most definitions microwaves start at 1GHz or 30CM what frequencies "microwave ovens" use is irrelevant as marketers can pretty much name anything what they want. |
#9
![]() |
|||
|
|||
![]()
Is AM Radio Harmful? Only if you listen to it.
|
#10
![]() |
|||
|
|||
![]()
Interesting. Especially since the older microwave ovens operated on 800
and 900 Mhz. I think the confusion here comes from certain articles. while 900 mhz was considered microwaves, hence the name "microwave ovens" when they were invented, most of the articles I read that mentioned the microwave band starting at around 1 ghz actually say thst microwaves "start at around 1 ghz", instead of saying that they do start around 1 ghz. I consider 900 mhz to be "around" 1 ghz. I think that a lot of people took the word "around" to mean "does". and then they might have even printed up websites theirselves that say they do start at 1 ghz. |
Reply |
|
Thread Tools | Search this Thread |
Display Modes | |
|
|