<html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class="">Also acknowledging Maiko's response saying essentially "no."<div class=""><br class=""></div><div class=""><div>My initial question(s) came from a desire to bridge two 2m packet networks. One is a localized packet frequency also designated for emergency use, and the other is a high-level BBS frequency that lets me reach from San Francisco way down past San Jose in the south Bay Area. </div><div><br class=""></div><div>But I stupidly ignored that the high-level BBS has a UHF frequency as well as a VHF frequency.</div><div><br class=""></div><div>So tha coaching has been useful, even though the problem as posed is insoluble.</div><div><br class=""></div><div>-Sky</div><div><br class=""></div><div><br class=""></div><div><br class=""><blockquote type="cite" class=""><div class="">On Jun 4, 2022, at 12:56 PM, Andrew Pepper <<a href="mailto:anpepper@gmail.com" class="">anpepper@gmail.com</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><div dir="auto" class="">You'd be better off using one port on vhf and the other port on uhf. All you'll need is a dual band antenna and a diplexer... Or just use two antennas. Then you'll avoid the need for expensive VHF duplex filters and worrying about both transmitters TXing at the same time.<div dir="auto" class="">Andrew </div></div><br class=""><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Sat, Jun 4, 2022, 15:19 <<a href="mailto:maiko@pcsinternet.ca" class="">maiko@pcsinternet.ca</a>> wrote:<br class=""></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><br class="">
> Please confirm the following:<br class="">
> <br class="">
> • The second interface would allow JNOS to simultaneously listen to<br class="">
> both frequencies, logging all traffic and serving its BBS on both<br class="">
> frequencies. (This one I am sure of.)<br class="">
<br class="">
Of course.<br class="">
<br class="">
> <br class="">
> • JNOS will not trigger a second radio to transmit at the same time as<br class="">
> the first. (This was one of my earlier questions, and I honestly do<br class="">
> not know the answer.)<br class="">
<br class="">
There is no way for JNOS to know, especially in KISS mode, it sends the<br class="">
data when it wants to send the data, so it has no idea when PTT is going<br class="">
to be active or not. Unless it controls PTT direct for some of the more<br class="">
recent code I wrote, but even then there is no 'check if another radio<br class="">
is active' type of code. I could put in code, but that could possibly<br class="">
introduce longer delays, since you still don't really know when the TNC<br class="">
is going to PTT the radio ? I have no experience with this, but this is<br class="">
what my sense would be.<br class="">
<br class="">
But it gets worse, even if one radio is not transmitting, suppose you<br class="">
are receiving a packet on the one, and you key up the other ? Signal<br class="">
will most likely get WASHED out anyways by your own TX on the other<br class="">
frequency ? Hopefully I am not making a fool of myself, it's been<br class="">
years since we played with stuff like DIODE MATRIX interconnected<br class="">
systems and the sort, that was a LONG time ago, oh my gosh ....<br class="">
<br class="">
Either huge duplexor cans or TNCs that can be GPS sync'd (never heard<br class="">
of that, but it would be cool, similar to motorola canopy systems).<br class="">
<br class="">
Yeah, if anyone wants to better educate us, please do :)<br class="">
<br class="">
> This would allow continued use of JNOS without additional work from <br class="">
> anybody.<br class="">
<br class="">
There would need to be some type of additional work in my opinion, <br class="">
unless<br class="">
you could somehow manage to separate the antennas really really good ...<br class="">
<br class="">
Maiko / VE4KLM<br class="">
<br class="">
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