2M Simplex Spacing and 70cm simplex in the NH/MA/RI local area

[Jwahar Bammi]

Can’t seem to find a definitive answer via google, so I thought I would consult the gurus here: For 2M Simplex operation what is the channel spacing in the NH/MA/RI local area, 15kHz or 20kHz channel spacing. So around the 146.520 calling frequency, are the up/down channels at 146.535/146.05 (15 kHz) or 146.540/146.500 (20kHz). The ARRL seems to suggest that the choice of 15 or 20kHz channel separation is dictated by the local area frequency coordinators.

For 70cm the best I could dig up was 446.000 is the simplex calling frequency, with 25kHz separation, and that no one really uses 70cm simplex. But i could be way off the mark, and stand to be corrected.

Your answers much appreciated in advance,

73 de kc1ccr

bammi

[Bill Barber]

Hello Bammi,

You are correct.  On 2 meters, the spacing between repeaters or simplex channels is 15 KHz above 146.500.  Normally starting at 146.520, then 146.535 and 146.550, etc.  Below 146.500, there are digital repeater outputs down to 146.400.  Below that frequency are inputs to analog repeaters with outputs +600 KHz.  There are also digital simplex channels around 145.790 for narrow band digital modes like DMR, D-STAR, Fusion.  Those narrowband modes have channel spacings of 10 KHz below 146.000 MHz.

On 70 cm. you won’t hear much activity on simplex, unless there is a contest or SOTA activation, but 446.000 is the popular frequency for analog.  Analog repeater or simplex spacings are 25 KHz, but there is movement to narrowband digital spacings of 12.5 KHz on 70 cm. to accommodate more digital repeaters.

73,

Bill, NE1B

[Nashua Area Radio Society]

The Following page might be what you are looking for?

From the New England Spectrum Management Council.

http://www.nesmc.org/docs/bandplans.pdf

 

 

[Jwahar Bammi]

Thank you very much Bill, Matt and Michael. Exactly the information I was looking for.

Matt thanks for your kind offer to sched a simplex chat, I will take you up on it. Also, will try the 10m club net. I travel a fair bit for work, so the next chance I get i will try.

Thanks again all, much appreciate the info

73 de kc1ccr
bammi

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