[chirp_users] # of Channels
When I program my Baofeng I have 129 Memory Channels for different Frequencies. If I had a million Memory Channels, how many could I fill for 2 meter?
Thank you, Clark
I will offer an analogy. If you have a football field all to yourself, you might ask, how many places are there to stand in this field. If you restrict yourself to the lines and yard marks, you can count the number of places where you can stand. If you select every inch of grass, you will have a million places to stand. Radio frequencies are like that, that is, they are like every square inch in the field, and you can think of the yard marks as channels on the radio. Glenn ----- Original Message ----- From: clark prather To: chirp_users@intrepid.danplanet.com Sent: Sunday, September 02, 2018 2:39 PM Subject: [chirp_users] # of Channels
When I program my Baofeng I have 129 Memory Channels for different Frequencies. If I had a million Memory Channels, how many could I fill for 2 meter?
Thank you, Clark
--------------------------------------------------------------------------------
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All of them and then some more.
On Sun, Sep 2, 2018 at 3:40 PM clark prather harpzilla@gmail.com wrote:
When I program my Baofeng I have 129 Memory Channels for different Frequencies. If I had a million Memory Channels, how many could I fill for 2 meter?
Thank you, Clark _______________________________________________ chirp_users mailing list chirp_users@intrepid.danplanet.com http://intrepid.danplanet.com/mailman/listinfo/chirp_users This message was sent to John Wuest at jhwuest@gmail.com To unsubscribe, send an email to chirp_users-unsubscribe@intrepid.danplanet.com
Do the math. Theoretically you could start at 144.005 and go up by .005 steps until you reach 147.995. How many of the frequencies would be useful, ????
Jardy Dawson WA7JRD Message sent through sub space hailing frequencies using the Universal Translator.
On Sep 2, 2018, at 12:39, clark prather harpzilla@gmail.com wrote:
When I program my Baofeng I have 129 Memory Channels for different Frequencies. If I had a million Memory Channels, how many could I fill for 2 meter?
Thank you, Clark _______________________________________________ chirp_users mailing list chirp_users@intrepid.danplanet.com http://intrepid.danplanet.com/mailman/listinfo/chirp_users This message was sent to Jardy at jardy72@yahoo.com To unsubscribe, send an email to chirp_users-unsubscribe@intrepid.danplanet.com
On Sep 2, 2018, at 15:39, clark prather harpzilla@gmail.com wrote:
When I program my Baofeng I have 129 Memory Channels for different Frequencies. If I had a million Memory Channels, how many could I fill for 2 meter?
The last time I messed with it, there were 73 repeater “pairs” (input-output frequencies) on 2 meters.
There are a number of simplex frequencies. These “channels” have been coordinated with the ARRL and local repeater groups throughout the country and world.
Go poke around on arrl.org http://arrl.org/ and read about “Band Plans”
Channels or memory is just a term the radio world uses to say what radio frequency will be received or transmitted by the method your radio “remembers” that function and type of signal.
Each type of radio signal takes up more “frequency” or space of the spectrum. Some FM signals are 15khz wide, others 10, some 7.5.
The old analog TV signals were 5 mhz wide.
Your radio is tuned to the center frequency, then decodes what is received, however “wide” it is… AM, FM, FM music, data
If you tune your radio to 146.000 and listen to a transmitter doing 5khz deviation voice, FM, there is “stuff” at 145.995 and 146.005. using 10 khz of the “frequencies” or spectrum.
Two meters is 4 million hertz wide. 144.00 to 148.00 Mhz. How many 10khz wide voice signals will fit?
No radio is perfect. There is a need to leave some space between “channels” so a strong transmitter near you does not trash a weak signal on the next channel you want to hear.
So there is only so much room for a number of “channels” in any frequency range, depending on the type of signal. Go tune across the FM broadcast band. (75khz deviation)
Go read some basic stuff, then ask better questions, you will get better answers.
Clark, As others have noted, the number of 2 meter frequencies (channels) depends significantly where you are located in the US. Some areas use 20 kHz channel spacing, while here in Southern California, because of the large numbers of licensed hams, and high demand for frequencies, the local area 2M frequency coordinating body (TASMA) has opted to publish a frequency coordination band plan with 15 kHz channel spacing. It is strongly recommended, and "good amateur practice" says that one adhere to these coordinated frequency band plans as much as possible. TASMA officially lists 87 Repeater frequency pairs, and 46 recognized simplex channels, and a handful of special use channels in the So. CA 2M band plan. In the event of interference complaints, the FCC will generally respect the local coordinating body's band plan and resolve the issue in conformance with that plan. Again, adhering to local band plans is considered "good amateur practice" a FCC requirement of all hams. You should find the website for your geographical area's local Frequency Coordinator and check to see if they have specific frequencies or channel band plan published as recommended frequencies. While one can legally deviate from the band plan, so long as they don't cause interference to users conforming to the band plan, still following the band plans where they exist is again, required "good amateur practice". HTH and 73 de Ray, AE6H
On Sunday, September 2, 2018 1:34 PM, r norris via chirp_users chirp_users@intrepid.danplanet.com wrote:
On Sep 2, 2018, at 15:39, clark prather harpzilla@gmail.com wrote: When I program my Baofeng I have 129 Memory Channels for different Frequencies. If I had a million Memory Channels, how many could I fill for 2 meter?
The last time I messed with it, there were 73 repeater “pairs” (input-output frequencies) on 2 meters. There are a number of simplex frequencies. These “channels” have been coordinated with the ARRL and local repeater groups throughout the country and world. Go poke around on arrl.org and read about “Band Plans” Channels or memory is just a term the radio world uses to say what radio frequency will be received or transmitted by the method your radio “remembers” that function and type of signal. Each type of radio signal takes up more “frequency” or space of the spectrum. Some FM signals are 15khz wide, others 10, some 7.5. The old analog TV signals were 5 mhz wide. Your radio is tuned to the center frequency, then decodes what is received, however “wide” it is… AM, FM, FM music, data If you tune your radio to 146.000 and listen to a transmitter doing 5khz deviation voice, FM, there is “stuff” at 145.995 and 146.005. using 10 khz of the “frequencies” or spectrum. Two meters is 4 million hertz wide. 144.00 to 148.00 Mhz. How many 10khz wide voice signals will fit? No radio is perfect. There is a need to leave some space between “channels” so a strong transmitter near you does not trash a weak signal on the next channel you want to hear. So there is only so much room for a number of “channels” in any frequency range, depending on the type of signal. Go tune across the FM broadcast band. (75khz deviation) Go read some basic stuff, then ask better questions, you will get better answers.
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It gets even more complicated than this. Just one example, I often visit Germany. The band plan there is extremely limited, as is the whole 2m band. The 2m band in Germany is from 144.000 to 146.000. When you reserve space for CW, SSB, APRS, Digital, beacons, and satellite, there isn’t a whole lot of room for repeaters or FM-simplex.
Vy73 - Mike - KD5KC.
El Paso, Texas - DM61rt.
SOTA W5T-Texas Association Manager.
NA-SOTA info is at: http://na-sota.org/ http://na-sota.org/
From: chirp_users-bounces@intrepid.danplanet.com chirp_users-bounces@intrepid.danplanet.com On Behalf Of Ray Hutchinson Sent: Sunday, September 2, 2018 3:28 PM To: Discussion of CHIRP chirp_users@intrepid.danplanet.com Subject: Re: [chirp_users] # of Channels
Clark,
As others have noted, the number of 2 meter frequencies (channels) depends significantly where you are located in the US. Some areas use 20 kHz channel spacing, while here in Southern California, because of the large numbers of licensed hams, and high demand for frequencies, the local area 2M frequency coordinating body (TASMA) has opted to publish a frequency coordination band plan with 15 kHz channel spacing. It is strongly recommended, and "good amateur practice" says that one adhere to these coordinated frequency band plans as much as possible.
TASMA officially lists 87 Repeater frequency pairs, and 46 recognized simplex channels, and a handful of special use channels in the So. CA 2M band plan. In the event of interference complaints, the FCC will generally respect the local coordinating body's band plan and resolve the issue in conformance with that plan. Again, adhering to local band plans is considered "good amateur practice" a FCC requirement of all hams.
You should find the website for your geographical area's local Frequency Coordinator and check to see if they have specific frequencies or channel band plan published as recommended frequencies. While one can legally deviate from the band plan, so long as they don't cause interference to users conforming to the band plan, still following the band plans where they exist is again, required "good amateur practice".
HTH and 73 de Ray, AE6H
On Sunday, September 2, 2018 1:34 PM, r norris via chirp_users <chirp_users@intrepid.danplanet.com mailto:chirp_users@intrepid.danplanet.com > wrote:
On Sep 2, 2018, at 15:39, clark prather <harpzilla@gmail.com mailto:harpzilla@gmail.com > wrote:
When I program my Baofeng I have 129 Memory Channels for different Frequencies. If I had a million Memory Channels, how many could I fill for 2 meter?
The last time I messed with it, there were 73 repeater “pairs” (input-output frequencies) on 2 meters.
There are a number of simplex frequencies. These “channels” have been coordinated with the ARRL and local repeater groups throughout the country and world.
Go poke around on arrl.org http://arrl.org/ and read about “Band Plans”
Channels or memory is just a term the radio world uses to say what radio frequency will be received or transmitted by the method your radio “remembers” that function and type of signal.
Each type of radio signal takes up more “frequency” or space of the spectrum. Some FM signals are 15khz wide, others 10, some 7.5.
The old analog TV signals were 5 mhz wide.
Your radio is tuned to the center frequency, then decodes what is received, however “wide” it is… AM, FM, FM music, data
If you tune your radio to 146.000 and listen to a transmitter doing 5khz deviation voice, FM, there is “stuff” at 145.995 and 146.005. using 10 khz of the “frequencies” or spectrum.
Two meters is 4 million hertz wide. 144.00 to 148.00 Mhz. How many 10khz wide voice signals will fit?
No radio is perfect. There is a need to leave some space between “channels” so a strong transmitter near you does not trash a weak signal on the next channel you want to hear.
So there is only so much room for a number of “channels” in any frequency range, depending on the type of signal. Go tune across the FM broadcast band. (75khz deviation)
Go read some basic stuff, then ask better questions, you will get better answers.
_______________________________________________ chirp_users mailing list chirp_users@intrepid.danplanet.com mailto:chirp_users@intrepid.danplanet.com http://intrepid.danplanet.com/mailman/listinfo/chirp_users This message was sent to Ray at rdhutch@pacbell.net mailto:rdhutch@pacbell.net To unsubscribe, send an email to chirp_users-unsubscribe@intrepid.danplanet.com mailto:chirp_users-unsubscribe@intrepid.danplanet.com
A million.
On 02 September 2018 at 16:32 r norris via chirp_users chirp_users@intrepid.danplanet.com wrote:
> > On Sep 2, 2018, at 15:39, clark prather < harpzilla@gmail.com mailto:harpzilla@gmail.com > wrote:When I program my Baofeng I have 129 Memory Channels for different Frequencies. If I had a million Memory Channels, how many could I fill for 2 meter? >
Here in the Colonies that would leave you a channel spacing of four Hz, somewhat less than the pass-band of most receivers.
On Sun, Sep 2, 2018 at 8:01 PM Nigel A. Gunn G8IFF/W8IFF nigel@ngunn.net wrote:
A million.
On 02 September 2018 at 16:32 r norris via chirp_users < chirp_users@intrepid.danplanet.com> wrote:
On Sep 2, 2018, at 15:39, clark prather < harpzilla@gmail.com> wrote:
When I program my Baofeng I have 129 Memory Channels for different Frequencies. If I had a million Memory Channels, how many could I fill for 2 meter?
chirp_users mailing list chirp_users@intrepid.danplanet.com http://intrepid.danplanet.com/mailman/listinfo/chirp_users This message was sent to Patricia Wilson at wilson.pr.gm@gmail.com To unsubscribe, send an email to chirp_users-unsubscribe@intrepid.danplanet.com
You must travel a lot. I would say from my 20 years as a Technician class holder that there is not enough frequencies and PL tones to fill a million channels# Do the math
On Sun, Sep 2, 2018 at 12:40 PM clark prather harpzilla@gmail.com wrote:
When I program my Baofeng I have 129 Memory Channels for different Frequencies. If I had a million Memory Channels, how many could I fill for 2 meter?
Thank you, Clark _______________________________________________ chirp_users mailing list chirp_users@intrepid.danplanet.com http://intrepid.danplanet.com/mailman/listinfo/chirp_users This message was sent to Dwayne Elliott at ke6pls2@gmail.com To unsubscribe, send an email to chirp_users-unsubscribe@intrepid.danplanet.com
participants (11)
-
clark prather -
Dwayne Elliott -
Glenn At Home -
Jardy -
John Wuest -
mike-2007＠elp.rr.com -
Nigel A. Gunn G8IFF/W8IFF -
Patricia Wilson -
r norris -
Ray Hutchinson -
Tom Consodine ND5Y