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Hi Steve; I'm a Zero Retries subscriber... keep up the good work! I apparently overlooked the "Mercury software-defined modem" item. I checked out the git-hub site, and looked for other references on

Jim W8SNSI said: Jim; I’m not sure why you responded specifically to me. I haven’t posted anything on this topic that would indicate you’d have any issues with a TS-480SAT and SignaLink. Are you

Mark - AD7EF, I have used a Kenwood TS-480SAT with a Signalink and it has never given me any trouble. My computer is a Dell Latitude. There are two usb cords needed. One goes to the signalink (for

Mark: I wouldn’t abandon hope on such a system just yet. Check this sub-article in my newsletter Zero Retries -

Dick, If the VARA modem app is showing in the task bar, that implies that the session window started the VARA modem. Is the session window also showing in the task bar? If so, maybe it is off-screen.

In the open session window you need to select settings/radio to select the radio type.

Packet is using Carrier Sense Multiple Access, CSMA. (CDMA is Code Division Multiple Access, a form of spread spectrum) VARA HF or VARA FM is not CSMA system since the channel is reserved for one QSO

Tadd; As I pointed out recently on the VARA-MODEM groups.io "VARA on M1 Mac" topic: "The VARA HF and VARA FM radio-modem software is proprietary. It is entirely up to the developer, Jose Alberto Nieto

VARA HF sessions are the same. if there’s traffic on the channel, the operator trying to connect must click the “Connect Anyway” button. Additionally, if listening to radio speaker, you can

Dan; "listen for a clear frequency" isn't the same as "collision detect", in the context of CDMA. As I pointed out earlier on this topic; ... VARA FM supports the busy-channel detection that is

Not true. Packet incorporates CDMA, carrier detect multiple access.? It deals with collisions quite well. VARA FM, so far I know, does not listen for a clear frequency therefor does not detect

Correct. The two VARA endpoints use nearly 100% of the airtime, when in a connected state, exclusive of:* Key-up time on each transmission* Minor quiet times between keep alive transmissions during

I want to clarify my comment about the Yaesu FT-991A being "a special case", in regards to full-throughput VARA FM WIDE operation, when the transceiver is set up with an external rig-interface device,

Wow, that's pretty ugly, Tadd. I plan on using our high-level VARA-FM digipeater as a "Gateway drug" to lure local Winlink users onto our AREDN mesh network :-D.? It's pretty-well developed in our

Using G8BPQ software, not uncommon, at 1200 baud AX.25 with NETROM over top of it, the typical 1200 baud throughput is 15 to 25 bytes of payload per second, plus callsigns and flags and whatnot, and

Great info, Mark - thanks! Orv W6BI

Orb; The simple answer is that VARA FM doesn’t do any collision avoidance. However, when there is an active VARA FM session between two station, any additional stations attempting to connect on the

Exactly Mark. An IC-7000 and a DigiRig can do all of that. (or something like that). 73 Danny, K5CG HH 550-000-0609 SKCC 14257 To: "VARA-MODEM" <[email protected]> Sent: Thursday, July 27, 2023

While this topic started with a discussion of good radios for VARA HF, several posters commented on the advantages of “all band” (HF + 6M + VHF/UHF) rigs, being able to do VARA FM on VHF/UHF

It does not. AX.25 allows for multiple users, Vara is one at a time as far as I know. KE8GRY