Local ham repeaters: Difference between revisions

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This is really for my own sake and probably not useful to others. Some geekery around local ham repeaters.
This is really for my own sake and probably not useful to others. Some geekery around local ham repeaters.


Signal reports are from a discone in my attic.
Signal reports are from a discone in my attic. Coverage predictions are from [https://www.ve2dbe.com/rmonline_s.asp Radio Mobile Online], and bake in a whole lot of assumptions for something I generally don't have many details for, so don't take them with any seriousness.


== Boston 145.23 ==
== Boston, 145.23 ==
-105 or so?
-105 dBm or so. A close-in hill leaves the signal a lot weaker here than it would otherwise be.


== Danvers 145.47 ==
http://web.archive.org/web/20010124070500/http://www.barc.org/barc/repeater.html had a lot more information than the current site.
-97 dBm
 
[[File:145.23-25w-unity.png|thumb|center|145.23 Coverage Prediction]]
 
== Harvard, 145.41 ==
-102 dBm here
 
[[File:Harvard 145.41.png|thumb|center]]
 
https://harvardrepeater.org/
 
== Belmont, 145.43 ==
 
-90 dBm
 
https://mmra.org/repeaters/BEL/
 
[[File:Belmont.png|thumb|center]]
 
== Danvers, 145.47 ==
-92 dBm on new feedline (was -97 dBm)
 
http://www.nsradio.org/
 
[[File:Danvers.png|thumb|center]]
 
== Waltham, 146.64 ==
-94 dBm


== Waltham 146.64 ==
Received at -92 dBm. Pretty close to what models indicate.
https://walthamara.org/about/repeaters/
https://walthamara.org/about/repeaters/


== Derry 146.85 ==
[[File:146.64 coverage prediction.png|thumb|center|146.64 coverage prediction]]
 
== Quincy, 146.67 ==
-99 dBm
 
https://mmra.org/repeaters/QCY/
 
[[File:146.67 Quincy.png|thumb|center]]
 
== North Reading, 146.715 ==
-90 dBm
 
[[File:North Reading.png|thumb|center]]
 
https://www.mmra.org/repeaters/NRD/
 
== Hollis, 146.73 ==
-93 dBm with more noise than I'd expect
 
[[File:Hollis.png|thumb|center]]
 
https://n1imo-n1imn.us/n1imo-n1imn-1/
 
== Weston, 146.79 ==
 
TBD
 
[[File:Weston.png|thumb|center]]
 
== Boston, 146.82 ==
-109 dBm, much weaker than I'd expect -- prediction is -94 dBm assuming 30W out.
 
[[File:Boston 146.82.png|thumb|center]]
 
https://mmra.org/repeaters/BBY/
 
== Derry, 146.85 ==
-91 dBm
-91 dBm


== Westford 146.955 ==
[[File:146.85 Derry.png|thumb|center]]
-80 dBm. Receiver jumped between -80 and "> -80 dBm"


== Paxton 146.97 ==
https://85webpage.org/
-108 dBm. Fairly weak.


IIRC the receive antenna is much higher up the tower so it might hear me better than I hear it.
== Pembroke, NH, 146.94 ==
-108 dBm. Honestly surprised it makes it down here.
 
http://www.cars-nh.org/
 
[[File:Pembroke.png|thumb|center]]
 
 
== Westford, 146.955 ==
-80 dBm.
 
http://wb1gof.org/F_repeater/index.html
 
[[File:Westford.png|thumb|center]]
 
== Paxton, 146.97 ==
-100 dBm. Fairly weak here due to local topography.
 
https://www.cmara.org/meetings/presentations/Paxton_Repeater_Presentation.pdf -- says about 30W out. TX at 100', RX at 250'.
 
[[File:Paxton.png|thumb|center]]


== Blue Hill, 146.985 ==
== Blue Hill, 146.985 ==
-105 dBm
-105 dBm


== Billerica 147.12 ==
== Nashua, 147.045 ==
-87 dBm
 
== Billerica, 147.12 ==
>-80 dBm
>-80 dBm


== Quincy ==
[[File:Billerica.png|thumb|center]]
-105 dBm
 
https://www.mmra.org/repeaters/BCA/
 
== Marlboro, 147.27 ==
-87 dBm received


== Marlboro 147.27 ==
-93 dBm received
https://mmra.org/repeaters/MRW/#14727
https://mmra.org/repeaters/MRW/#14727


== Boston 146.82 ==
[[File:Marlboro VHF coverage.png|thumb|center]]
-109 (weirdly weak)
 
== 70 cm ==
* -101 dBm 444.1 Andover (close-in hill adds a lot of attenuation for me)
* -84 dBm Woburn
* -102 dBm Pack Monadnock
* -105 dBm Marlboro Hub
 
== NOAA Weather Radio ==
* 162.400 Concord: -96 dBm
* 162.425 Gloucester: -99 dBm
* 162.450 Saddleback: -85 dBm
* 162.475 Boston: -87 dBm
* 162.500 Mt. Washington: no signal
* 162.525 Pack: >-80 dBm
* 162.550 Paxton: -83 dBm

Latest revision as of 16:31, 18 July 2022

This is really for my own sake and probably not useful to others. Some geekery around local ham repeaters.

Signal reports are from a discone in my attic. Coverage predictions are from Radio Mobile Online, and bake in a whole lot of assumptions for something I generally don't have many details for, so don't take them with any seriousness.

Boston, 145.23

-105 dBm or so. A close-in hill leaves the signal a lot weaker here than it would otherwise be.

http://web.archive.org/web/20010124070500/http://www.barc.org/barc/repeater.html had a lot more information than the current site.

145.23 Coverage Prediction

Harvard, 145.41

-102 dBm here

https://harvardrepeater.org/

Belmont, 145.43

-90 dBm

https://mmra.org/repeaters/BEL/

Danvers, 145.47

-92 dBm on new feedline (was -97 dBm)

http://www.nsradio.org/

Waltham, 146.64

-94 dBm

https://walthamara.org/about/repeaters/

146.64 coverage prediction

Quincy, 146.67

-99 dBm

https://mmra.org/repeaters/QCY/

North Reading, 146.715

-90 dBm

https://www.mmra.org/repeaters/NRD/

Hollis, 146.73

-93 dBm with more noise than I'd expect

https://n1imo-n1imn.us/n1imo-n1imn-1/

Weston, 146.79

TBD

Boston, 146.82

-109 dBm, much weaker than I'd expect -- prediction is -94 dBm assuming 30W out.

https://mmra.org/repeaters/BBY/

Derry, 146.85

-91 dBm

https://85webpage.org/

Pembroke, NH, 146.94

-108 dBm. Honestly surprised it makes it down here.

http://www.cars-nh.org/


Westford, 146.955

-80 dBm.

http://wb1gof.org/F_repeater/index.html

Paxton, 146.97

-100 dBm. Fairly weak here due to local topography.

https://www.cmara.org/meetings/presentations/Paxton_Repeater_Presentation.pdf -- says about 30W out. TX at 100', RX at 250'.

Blue Hill, 146.985

-105 dBm

Nashua, 147.045

-87 dBm

Billerica, 147.12

>-80 dBm

https://www.mmra.org/repeaters/BCA/

Marlboro, 147.27

-87 dBm received

https://mmra.org/repeaters/MRW/#14727

70 cm

  • -101 dBm 444.1 Andover (close-in hill adds a lot of attenuation for me)
  • -84 dBm Woburn
  • -102 dBm Pack Monadnock
  • -105 dBm Marlboro Hub

NOAA Weather Radio

  • 162.400 Concord: -96 dBm
  • 162.425 Gloucester: -99 dBm
  • 162.450 Saddleback: -85 dBm
  • 162.475 Boston: -87 dBm
  • 162.500 Mt. Washington: no signal
  • 162.525 Pack: >-80 dBm
  • 162.550 Paxton: -83 dBm
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