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

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This topic contains 5 replies, has 4 voices, and was last updated by  Jwahar Bammi 1 year ago.

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  • #14201

    Jwahar Bammi
    Participant

    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

    #14209
    Bill Barber
    Bill Barber
    Participant

    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

    #14250
    Matt Sapienza
    Matt Sapienza
    Participant

    i found a artical from n5lxi on 2 meter simplex (n5lxi.com) he has 12 simplex frequencies programed in his radio as followed (based on 15 khz separation)  #1. 146.430. #2. 146.460. #3 146.490. #4 146.520 national calling frequency. #5 146.550. #6 146.580. #7 147.420.#8. 147.450. #9. 147.480. #10. 147.510. #11. 147.540. #12 147.570. i hope this helps? i do as much 2 simplex as i can you may find me on 146.535 most of the time? or 146.555 . or 146.580 i hear more simplex activity on 580 in Nashua NH. if you like to try 2 simplex? look me up on qrz n1zgn and send me a e mail. [email protected] 73’s matt

    Matt Sapienza, N1ZGN

    #14252
    Matt Sapienza
    Matt Sapienza
    Participant

    hope to hear you jwahar on clubs 10 meter chat net that i n/c 28480 every Sunday evening 830pm – 915pm .

    Matt Sapienza, N1ZGN

    #14422
    Michael Struzik
    Michael Struzik
    Participant

    The Following page might be what you are looking for?

    From the New England Spectrum Management Council.

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

     

     

    AB1YK

    #14456

    Jwahar Bammi
    Participant

    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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