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Cross-band repeat & NBFM HTs
I need a multi-band HT that does cross band repeat and has narrow-band FM
capability. Look like the IC-w32a is the only one that meets this spec. Anybody know of another? If not cross-band capable, how about a multi-band that is NBFM capable? 73 Neal N7RX |
Go with the Kenwood TH-F6, Its a 5 Watt Tri-Bander with a GREAT wide band
receiver "N7RX" wrote in message ... I need a multi-band HT that does cross band repeat and has narrow-band FM capability. Look like the IC-w32a is the only one that meets this spec. Anybody know of another? If not cross-band capable, how about a multi-band that is NBFM capable? 73 Neal N7RX |
Go with the Kenwood TH-F6, Its a 5 Watt Tri-Bander with a GREAT wide band
receiver "N7RX" wrote in message ... I need a multi-band HT that does cross band repeat and has narrow-band FM capability. Look like the IC-w32a is the only one that meets this spec. Anybody know of another? If not cross-band capable, how about a multi-band that is NBFM capable? 73 Neal N7RX |
Go with the Kenwood TH-F6, Its a 5 Watt Tri-Bander with a GREAT wide band
receiver "N7RX" wrote in message ... I need a multi-band HT that does cross band repeat and has narrow-band FM capability. Look like the IC-w32a is the only one that meets this spec. Anybody know of another? If not cross-band capable, how about a multi-band that is NBFM capable? 73 Neal N7RX |
Neal,
Does multi-band include dual band, 2 meters+440? What do you mean by narrow? A few dual-banders I know of with crossband repeat: Yaesu FT-51 Kenwood TH-77 I think the Kenwood TH-75 does crossband repeat with a mod. Also check with a TH-78 owner. One warning: Most HT's have minimal heatsinks and heat up very fast. Keep the output power low, don't talk a lot or both. 73, Jim On Mon, 20 Sep 2004 09:48:42 -0700, "N7RX" wrote: I need a multi-band HT that does cross band repeat and has narrow-band FM capability. Look like the IC-w32a is the only one that meets this spec. Anybody know of another? If not cross-band capable, how about a multi-band that is NBFM capable? 73 Neal N7RX |
Neal,
Does multi-band include dual band, 2 meters+440? What do you mean by narrow? A few dual-banders I know of with crossband repeat: Yaesu FT-51 Kenwood TH-77 I think the Kenwood TH-75 does crossband repeat with a mod. Also check with a TH-78 owner. One warning: Most HT's have minimal heatsinks and heat up very fast. Keep the output power low, don't talk a lot or both. 73, Jim On Mon, 20 Sep 2004 09:48:42 -0700, "N7RX" wrote: I need a multi-band HT that does cross band repeat and has narrow-band FM capability. Look like the IC-w32a is the only one that meets this spec. Anybody know of another? If not cross-band capable, how about a multi-band that is NBFM capable? 73 Neal N7RX |
Neal,
Does multi-band include dual band, 2 meters+440? What do you mean by narrow? A few dual-banders I know of with crossband repeat: Yaesu FT-51 Kenwood TH-77 I think the Kenwood TH-75 does crossband repeat with a mod. Also check with a TH-78 owner. One warning: Most HT's have minimal heatsinks and heat up very fast. Keep the output power low, don't talk a lot or both. 73, Jim On Mon, 20 Sep 2004 09:48:42 -0700, "N7RX" wrote: I need a multi-band HT that does cross band repeat and has narrow-band FM capability. Look like the IC-w32a is the only one that meets this spec. Anybody know of another? If not cross-band capable, how about a multi-band that is NBFM capable? 73 Neal N7RX |
I'm not sure why you think the F6 meets my specs - it has neither
cross-band repeat nor NBFM. "Lew" wrote in message t... Go with the Kenwood TH-F6, Its a 5 Watt Tri-Bander with a GREAT wide band receiver "N7RX" wrote in message ... I need a multi-band HT that does cross band repeat and has narrow-band FM capability. Look like the IC-w32a is the only one that meets this spec. Anybody know of another? If not cross-band capable, how about a multi-band that is NBFM capable? 73 Neal N7RX |
I'm not sure why you think the F6 meets my specs - it has neither
cross-band repeat nor NBFM. "Lew" wrote in message t... Go with the Kenwood TH-F6, Its a 5 Watt Tri-Bander with a GREAT wide band receiver "N7RX" wrote in message ... I need a multi-band HT that does cross band repeat and has narrow-band FM capability. Look like the IC-w32a is the only one that meets this spec. Anybody know of another? If not cross-band capable, how about a multi-band that is NBFM capable? 73 Neal N7RX |
I'm not sure why you think the F6 meets my specs - it has neither
cross-band repeat nor NBFM. "Lew" wrote in message t... Go with the Kenwood TH-F6, Its a 5 Watt Tri-Bander with a GREAT wide band receiver "N7RX" wrote in message ... I need a multi-band HT that does cross band repeat and has narrow-band FM capability. Look like the IC-w32a is the only one that meets this spec. Anybody know of another? If not cross-band capable, how about a multi-band that is NBFM capable? 73 Neal N7RX |
On Wed, 22 Sep 2004 14:26:53 -0700, "N7RX" wrote:
I'm not sure why you think the F6 meets my specs - it has neither cross-band repeat nor NBFM. You're right about the cross-band repeat - it doesn't offer that. However it does have a setting for NBFM. "Lew" wrote in message et... Go with the Kenwood TH-F6, Its a 5 Watt Tri-Bander with a GREAT wide band receiver "N7RX" wrote in message ... I need a multi-band HT that does cross band repeat and has narrow-band FM capability. Look like the IC-w32a is the only one that meets this spec. Anybody know of another? If not cross-band capable, how about a multi-band that is NBFM capable? 73 Neal N7RX |
On Wed, 22 Sep 2004 14:26:53 -0700, "N7RX" wrote:
I'm not sure why you think the F6 meets my specs - it has neither cross-band repeat nor NBFM. You're right about the cross-band repeat - it doesn't offer that. However it does have a setting for NBFM. "Lew" wrote in message et... Go with the Kenwood TH-F6, Its a 5 Watt Tri-Bander with a GREAT wide band receiver "N7RX" wrote in message ... I need a multi-band HT that does cross band repeat and has narrow-band FM capability. Look like the IC-w32a is the only one that meets this spec. Anybody know of another? If not cross-band capable, how about a multi-band that is NBFM capable? 73 Neal N7RX |
On Wed, 22 Sep 2004 14:26:53 -0700, "N7RX" wrote:
I'm not sure why you think the F6 meets my specs - it has neither cross-band repeat nor NBFM. You're right about the cross-band repeat - it doesn't offer that. However it does have a setting for NBFM. "Lew" wrote in message et... Go with the Kenwood TH-F6, Its a 5 Watt Tri-Bander with a GREAT wide band receiver "N7RX" wrote in message ... I need a multi-band HT that does cross band repeat and has narrow-band FM capability. Look like the IC-w32a is the only one that meets this spec. Anybody know of another? If not cross-band capable, how about a multi-band that is NBFM capable? 73 Neal N7RX |
What is "narrow-band FM"??? Some could say that *all* FM ham radios use
"narrow-band" ... compared to a FM broadcast station. Richard in Boston, MA, USA N7RX wrote: : I need a multi-band HT that does cross band repeat and has narrow-band FM : capability. Look like the IC-w32a is the only one that meets this spec. : Anybody know of another? : If not cross-band capable, how about a multi-band that is NBFM capable? : 73 Neal N7RX |
What is "narrow-band FM"??? Some could say that *all* FM ham radios use
"narrow-band" ... compared to a FM broadcast station. Richard in Boston, MA, USA N7RX wrote: : I need a multi-band HT that does cross band repeat and has narrow-band FM : capability. Look like the IC-w32a is the only one that meets this spec. : Anybody know of another? : If not cross-band capable, how about a multi-band that is NBFM capable? : 73 Neal N7RX |
What is "narrow-band FM"??? Some could say that *all* FM ham radios use
"narrow-band" ... compared to a FM broadcast station. Richard in Boston, MA, USA N7RX wrote: : I need a multi-band HT that does cross band repeat and has narrow-band FM : capability. Look like the IC-w32a is the only one that meets this spec. : Anybody know of another? : If not cross-band capable, how about a multi-band that is NBFM capable? : 73 Neal N7RX |
In article ,
Richard G Amirault wrote: What is "narrow-band FM"??? Some could say that *all* FM ham radios use "narrow-band" ... compared to a FM broadcast station. True 'nuff. 5 kHz peak deviation seems to be standard here in the U.S. I understand that in many European countries, amateurs have settled on 2.5 kHz peak deviation. This allows a larger number of repeaters to be packed into a given amount of spectrum and geographic space... and as the European 2-meter band is only half as wide as the U.S. band, it seems like a good tradeoff. -- Dave Platt AE6EO Hosting the Jade Warrior home page: http://www.radagast.org/jade-warrior I do _not_ wish to receive unsolicited commercial email, and I will boycott any company which has the gall to send me such ads! |
In article ,
Richard G Amirault wrote: What is "narrow-band FM"??? Some could say that *all* FM ham radios use "narrow-band" ... compared to a FM broadcast station. True 'nuff. 5 kHz peak deviation seems to be standard here in the U.S. I understand that in many European countries, amateurs have settled on 2.5 kHz peak deviation. This allows a larger number of repeaters to be packed into a given amount of spectrum and geographic space... and as the European 2-meter band is only half as wide as the U.S. band, it seems like a good tradeoff. -- Dave Platt AE6EO Hosting the Jade Warrior home page: http://www.radagast.org/jade-warrior I do _not_ wish to receive unsolicited commercial email, and I will boycott any company which has the gall to send me such ads! |
In article ,
Richard G Amirault wrote: What is "narrow-band FM"??? Some could say that *all* FM ham radios use "narrow-band" ... compared to a FM broadcast station. True 'nuff. 5 kHz peak deviation seems to be standard here in the U.S. I understand that in many European countries, amateurs have settled on 2.5 kHz peak deviation. This allows a larger number of repeaters to be packed into a given amount of spectrum and geographic space... and as the European 2-meter band is only half as wide as the U.S. band, it seems like a good tradeoff. -- Dave Platt AE6EO Hosting the Jade Warrior home page: http://www.radagast.org/jade-warrior I do _not_ wish to receive unsolicited commercial email, and I will boycott any company which has the gall to send me such ads! |
The term has changed over the years and has a couple of definitions.
There is a 'mathematical' or technical definition where it depends upon the modulation index. I don't remember the number, but I think it may be where the modulation index produces sidebands such that those past the first (Bessel order 1) have levels that are considered insignificant. [[ Be advised, FM has sidebands to infinity...always]] Then there is the practical or colloquial. Right now, 2.5 KHz peak deviation is called "Narrow FM" because 5KHz is/was the 'norm'. When 30 KHz was the norm, 15 KHz was called narrow or "split channel". After 15 KHz was established, 5KHz was split channel or narrow. And so it goes. Then there was the QST article about "Micro band FM" with extremely little deviation (An April spoof since it is not technically viable). The multi-band Kenwood TH-F6 / F7 (144/222/440) is NFM capable. However, I suspect that they only cut the Tx deviation and leave the RX filtering the same as 5KHz deviation... By the way. The 15 KHz channels currently used by US hams are not what the 5KHz deviation is designed for. 15 KHz. is actually "alternate" channel operation and is only intended for systems with enough physical separation to keep the adjacent channel energy low enough to cause trouble. A 5 KHz system can not 'normally' handle 15 KHz spacing. The sidebands are not, and the required Rx filtering can not be made compatible with 15 KHz spacing. The two are mutually exclusive. 5 KHz deviation has significant sideband energy in the adjacent 15 KHz channel and the RX filtering required for the 5 KHz deviation must be wide enough to accept this energy in order to provide acceptable distortion on channel. -- Steve N, K,9;d, c. i My email has no u's. "Richard G Amirault" wrote in message ... What is "narrow-band FM"??? Some could say that *all* FM ham radios use "narrow-band" ... compared to a FM broadcast station. Richard in Boston, MA, USA N7RX wrote: : I need a multi-band HT that does cross band repeat and has narrow-band FM : capability. Look like the IC-w32a is the only one that meets this spec. : Anybody know of another? : If not cross-band capable, how about a multi-band that is NBFM capable? : 73 Neal N7RX |
The term has changed over the years and has a couple of definitions.
There is a 'mathematical' or technical definition where it depends upon the modulation index. I don't remember the number, but I think it may be where the modulation index produces sidebands such that those past the first (Bessel order 1) have levels that are considered insignificant. [[ Be advised, FM has sidebands to infinity...always]] Then there is the practical or colloquial. Right now, 2.5 KHz peak deviation is called "Narrow FM" because 5KHz is/was the 'norm'. When 30 KHz was the norm, 15 KHz was called narrow or "split channel". After 15 KHz was established, 5KHz was split channel or narrow. And so it goes. Then there was the QST article about "Micro band FM" with extremely little deviation (An April spoof since it is not technically viable). The multi-band Kenwood TH-F6 / F7 (144/222/440) is NFM capable. However, I suspect that they only cut the Tx deviation and leave the RX filtering the same as 5KHz deviation... By the way. The 15 KHz channels currently used by US hams are not what the 5KHz deviation is designed for. 15 KHz. is actually "alternate" channel operation and is only intended for systems with enough physical separation to keep the adjacent channel energy low enough to cause trouble. A 5 KHz system can not 'normally' handle 15 KHz spacing. The sidebands are not, and the required Rx filtering can not be made compatible with 15 KHz spacing. The two are mutually exclusive. 5 KHz deviation has significant sideband energy in the adjacent 15 KHz channel and the RX filtering required for the 5 KHz deviation must be wide enough to accept this energy in order to provide acceptable distortion on channel. -- Steve N, K,9;d, c. i My email has no u's. "Richard G Amirault" wrote in message ... What is "narrow-band FM"??? Some could say that *all* FM ham radios use "narrow-band" ... compared to a FM broadcast station. Richard in Boston, MA, USA N7RX wrote: : I need a multi-band HT that does cross band repeat and has narrow-band FM : capability. Look like the IC-w32a is the only one that meets this spec. : Anybody know of another? : If not cross-band capable, how about a multi-band that is NBFM capable? : 73 Neal N7RX |
The term has changed over the years and has a couple of definitions.
There is a 'mathematical' or technical definition where it depends upon the modulation index. I don't remember the number, but I think it may be where the modulation index produces sidebands such that those past the first (Bessel order 1) have levels that are considered insignificant. [[ Be advised, FM has sidebands to infinity...always]] Then there is the practical or colloquial. Right now, 2.5 KHz peak deviation is called "Narrow FM" because 5KHz is/was the 'norm'. When 30 KHz was the norm, 15 KHz was called narrow or "split channel". After 15 KHz was established, 5KHz was split channel or narrow. And so it goes. Then there was the QST article about "Micro band FM" with extremely little deviation (An April spoof since it is not technically viable). The multi-band Kenwood TH-F6 / F7 (144/222/440) is NFM capable. However, I suspect that they only cut the Tx deviation and leave the RX filtering the same as 5KHz deviation... By the way. The 15 KHz channels currently used by US hams are not what the 5KHz deviation is designed for. 15 KHz. is actually "alternate" channel operation and is only intended for systems with enough physical separation to keep the adjacent channel energy low enough to cause trouble. A 5 KHz system can not 'normally' handle 15 KHz spacing. The sidebands are not, and the required Rx filtering can not be made compatible with 15 KHz spacing. The two are mutually exclusive. 5 KHz deviation has significant sideband energy in the adjacent 15 KHz channel and the RX filtering required for the 5 KHz deviation must be wide enough to accept this energy in order to provide acceptable distortion on channel. -- Steve N, K,9;d, c. i My email has no u's. "Richard G Amirault" wrote in message ... What is "narrow-band FM"??? Some could say that *all* FM ham radios use "narrow-band" ... compared to a FM broadcast station. Richard in Boston, MA, USA N7RX wrote: : I need a multi-band HT that does cross band repeat and has narrow-band FM : capability. Look like the IC-w32a is the only one that meets this spec. : Anybody know of another? : If not cross-band capable, how about a multi-band that is NBFM capable? : 73 Neal N7RX |
That's interesting ...What I'm referring to as "narrowband" is the new NTIA
channeling plan for public service band beginning at 162.0125 and progressing at 12.5 KHz intervals to create 942 channels through 174 Mhz. Everybody calls it narrowband but nobody can explain why its any different than what's in use now except for the channelization. I know that I can set my TH-D7AG to the 4th decimal (e.g., a 6.25 KHz increment), but I don't know if it's really doing what NTIA refers to a "narrowband." "Steve Nosko" wrote in message ... The term has changed over the years and has a couple of definitions. There is a 'mathematical' or technical definition where it depends upon the modulation index. I don't remember the number, but I think it may be where the modulation index produces sidebands such that those past the first (Bessel order 1) have levels that are considered insignificant. [[ Be advised, FM has sidebands to infinity...always]] Then there is the practical or colloquial. Right now, 2.5 KHz peak deviation is called "Narrow FM" because 5KHz is/was the 'norm'. When 30 KHz was the norm, 15 KHz was called narrow or "split channel". After 15 KHz was established, 5KHz was split channel or narrow. And so it goes. Then there was the QST article about "Micro band FM" with extremely little deviation (An April spoof since it is not technically viable). The multi-band Kenwood TH-F6 / F7 (144/222/440) is NFM capable. However, I suspect that they only cut the Tx deviation and leave the RX filtering the same as 5KHz deviation... By the way. The 15 KHz channels currently used by US hams are not what the 5KHz deviation is designed for. 15 KHz. is actually "alternate" channel operation and is only intended for systems with enough physical separation to keep the adjacent channel energy low enough to cause trouble. A 5 KHz system can not 'normally' handle 15 KHz spacing. The sidebands are not, and the required Rx filtering can not be made compatible with 15 KHz spacing. The two are mutually exclusive. 5 KHz deviation has significant sideband energy in the adjacent 15 KHz channel and the RX filtering required for the 5 KHz deviation must be wide enough to accept this energy in order to provide acceptable distortion on channel. -- Steve N, K,9;d, c. i My email has no u's. "Richard G Amirault" wrote in message ... What is "narrow-band FM"??? Some could say that *all* FM ham radios use "narrow-band" ... compared to a FM broadcast station. Richard in Boston, MA, USA N7RX wrote: : I need a multi-band HT that does cross band repeat and has narrow-band FM : capability. Look like the IC-w32a is the only one that meets this spec. : Anybody know of another? : If not cross-band capable, how about a multi-band that is NBFM capable? : 73 Neal N7RX |
That's interesting ...What I'm referring to as "narrowband" is the new NTIA
channeling plan for public service band beginning at 162.0125 and progressing at 12.5 KHz intervals to create 942 channels through 174 Mhz. Everybody calls it narrowband but nobody can explain why its any different than what's in use now except for the channelization. I know that I can set my TH-D7AG to the 4th decimal (e.g., a 6.25 KHz increment), but I don't know if it's really doing what NTIA refers to a "narrowband." "Steve Nosko" wrote in message ... The term has changed over the years and has a couple of definitions. There is a 'mathematical' or technical definition where it depends upon the modulation index. I don't remember the number, but I think it may be where the modulation index produces sidebands such that those past the first (Bessel order 1) have levels that are considered insignificant. [[ Be advised, FM has sidebands to infinity...always]] Then there is the practical or colloquial. Right now, 2.5 KHz peak deviation is called "Narrow FM" because 5KHz is/was the 'norm'. When 30 KHz was the norm, 15 KHz was called narrow or "split channel". After 15 KHz was established, 5KHz was split channel or narrow. And so it goes. Then there was the QST article about "Micro band FM" with extremely little deviation (An April spoof since it is not technically viable). The multi-band Kenwood TH-F6 / F7 (144/222/440) is NFM capable. However, I suspect that they only cut the Tx deviation and leave the RX filtering the same as 5KHz deviation... By the way. The 15 KHz channels currently used by US hams are not what the 5KHz deviation is designed for. 15 KHz. is actually "alternate" channel operation and is only intended for systems with enough physical separation to keep the adjacent channel energy low enough to cause trouble. A 5 KHz system can not 'normally' handle 15 KHz spacing. The sidebands are not, and the required Rx filtering can not be made compatible with 15 KHz spacing. The two are mutually exclusive. 5 KHz deviation has significant sideband energy in the adjacent 15 KHz channel and the RX filtering required for the 5 KHz deviation must be wide enough to accept this energy in order to provide acceptable distortion on channel. -- Steve N, K,9;d, c. i My email has no u's. "Richard G Amirault" wrote in message ... What is "narrow-band FM"??? Some could say that *all* FM ham radios use "narrow-band" ... compared to a FM broadcast station. Richard in Boston, MA, USA N7RX wrote: : I need a multi-band HT that does cross band repeat and has narrow-band FM : capability. Look like the IC-w32a is the only one that meets this spec. : Anybody know of another? : If not cross-band capable, how about a multi-band that is NBFM capable? : 73 Neal N7RX |
That's interesting ...What I'm referring to as "narrowband" is the new NTIA
channeling plan for public service band beginning at 162.0125 and progressing at 12.5 KHz intervals to create 942 channels through 174 Mhz. Everybody calls it narrowband but nobody can explain why its any different than what's in use now except for the channelization. I know that I can set my TH-D7AG to the 4th decimal (e.g., a 6.25 KHz increment), but I don't know if it's really doing what NTIA refers to a "narrowband." "Steve Nosko" wrote in message ... The term has changed over the years and has a couple of definitions. There is a 'mathematical' or technical definition where it depends upon the modulation index. I don't remember the number, but I think it may be where the modulation index produces sidebands such that those past the first (Bessel order 1) have levels that are considered insignificant. [[ Be advised, FM has sidebands to infinity...always]] Then there is the practical or colloquial. Right now, 2.5 KHz peak deviation is called "Narrow FM" because 5KHz is/was the 'norm'. When 30 KHz was the norm, 15 KHz was called narrow or "split channel". After 15 KHz was established, 5KHz was split channel or narrow. And so it goes. Then there was the QST article about "Micro band FM" with extremely little deviation (An April spoof since it is not technically viable). The multi-band Kenwood TH-F6 / F7 (144/222/440) is NFM capable. However, I suspect that they only cut the Tx deviation and leave the RX filtering the same as 5KHz deviation... By the way. The 15 KHz channels currently used by US hams are not what the 5KHz deviation is designed for. 15 KHz. is actually "alternate" channel operation and is only intended for systems with enough physical separation to keep the adjacent channel energy low enough to cause trouble. A 5 KHz system can not 'normally' handle 15 KHz spacing. The sidebands are not, and the required Rx filtering can not be made compatible with 15 KHz spacing. The two are mutually exclusive. 5 KHz deviation has significant sideband energy in the adjacent 15 KHz channel and the RX filtering required for the 5 KHz deviation must be wide enough to accept this energy in order to provide acceptable distortion on channel. -- Steve N, K,9;d, c. i My email has no u's. "Richard G Amirault" wrote in message ... What is "narrow-band FM"??? Some could say that *all* FM ham radios use "narrow-band" ... compared to a FM broadcast station. Richard in Boston, MA, USA N7RX wrote: : I need a multi-band HT that does cross band repeat and has narrow-band FM : capability. Look like the IC-w32a is the only one that meets this spec. : Anybody know of another? : If not cross-band capable, how about a multi-band that is NBFM capable? : 73 Neal N7RX |
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"N7RX" wrote in message ... That's interesting ...What I'm referring to as "narrowband" is the new NTIA channeling plan for public service band beginning at 162.0125 and progressing at 12.5 KHz intervals to create 942 channels through 174 Mhz. Everybody calls it narrowband but nobody can explain why its any different than what's in use now except for the channelization. That's it. More channels for those in need. A big deal if you need channels. -- Steve N, K,9;d, c. i My email has no u's. |
"N7RX" wrote in message ... That's interesting ...What I'm referring to as "narrowband" is the new NTIA channeling plan for public service band beginning at 162.0125 and progressing at 12.5 KHz intervals to create 942 channels through 174 Mhz. Everybody calls it narrowband but nobody can explain why its any different than what's in use now except for the channelization. That's it. More channels for those in need. A big deal if you need channels. -- Steve N, K,9;d, c. i My email has no u's. |
"N7RX" wrote in message ... That's interesting ...What I'm referring to as "narrowband" is the new NTIA channeling plan for public service band beginning at 162.0125 and progressing at 12.5 KHz intervals to create 942 channels through 174 Mhz. Everybody calls it narrowband but nobody can explain why its any different than what's in use now except for the channelization. That's it. More channels for those in need. A big deal if you need channels. -- Steve N, K,9;d, c. i My email has no u's. |
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