Kermit Your proposed answer is a good simple one. There are plenty of places in the simplex portion of the bands that can accommodate the DMR and Fusion conversations. Here in TN we don’t have an issue with differing modes conflicting. On both 2M and 70cm, frequencies about 15kc off the FM calling frequency are used for other modes. We don’t need to get into this supposed fight over setting up a separate calling freq for each mode. Ed B. Hudgens, P. E., Ret. Emergency Coordinator – Williamson County – WCARES WCEMA Reserve Member Vice Director, Delta Division ARRL Net Manager - ARRL Delta Div. Emergency Net 1441 Wexford Downs Lane Nashville, TN, 37211 C – 615-630-2753 From: arrl-odv <arrl-odv-bounces@reflector.arrl.org> On Behalf Of Kermit Carlson via arrl-odv Sent: Thursday, May 13, 2021 8:11 AM To: Arrl-odv <arrl-odv@arrl.org> Subject: [arrl-odv:32357] Digital Voice Calling Frequencies ? Hello All - I have two questions - 1. Are there any VHF Calling frequencies in common use for Digital Voice (DV) on VHF/UHF?
From what I have observed this is local option.
2. With the proliferation of varied DV modes - it is hard to imagine a frequency for >each< mode, and with the AM users (about 8 in Chicago asking the same question) it seems ridiculous to carve out spectral playgrounds for a few dozen ops on each “non-FM mode”. My answer will be; find a frequency in the “simplex” FM portion of the bands that is little used in your area and avoid the satellite and weak signal portions of the bands. IMHO, we do not want to be involved with the selection of a National recommendation. Also, with the lack of activity on the bands this is definitely a solution looking for a problem. Another point is that hearing other Activity on “your” frequency does not constitute interference if the frequency is not in use... Any thoughts from the Board before I respond ? 73, Kermit W9XA ps - The Chicago AM ops used to gather on 144.35 MHz based on the history from the days of the “Club Saver” transceiver built by the hundreds by the WCRA (Wheaton Community Radio Amateurs). I have seen AM “nets” on 144.144 - luckily too high in the band for QRM with 2M EME. From: Ronald F. Henry <n9kww@msn.com <mailto:n9kww@msn.com> > Sent: Wednesday, May 12, 2021 2:20 PM Subject: Digital voice simplex frequency recommendations Dear sir: with the increased use of DMR,P-25 and DSTAR digital voice modes, a question has come up regarding the national simplex frequency. Historically that was considered the national simplex frequency for analog voice, with the new digital modes using that frequency will over time cause jamming and interference, since analog users cannot decode digital mode. In addition even the various digital mode cannot detect other digital modes as well. DSTAR and DMR user groups have unofficially designated VHF and UHF (primarily in the 2 meter and 70 CM bands) frequencies for simplex use on those modes. Most coordination councils have taken a hands off approach , this leads to repeater and simplex interference and conflicts. It is apparent that the one frequency concept is no longer a viable option. Granted simplex use overall is low, however with the proliferation of cheap easy to use digital handheld radios, simplex use with digital voice will become widely available and in use, this will lead to more interference reports and frustration from older hams still using wideband fm analog. The question we have is what is the ARRL’s recommendation the use of the national simplex frequencies with digital voice modes? What are the thoughts of the ARRL regarding the use of other frequencies for mode specific DV use? Has there been any thought into separating DV from analog voice in simplex operation? Thank you for you diligence inti this mater Ron Henry KB9ZB President Pewaukee Amateur Radio Club (PARC) Sent from Yahoo Mail for iPhone <https://overview.mail.yahoo.com/?.src=iOS>