Annapolis REMOTE CONTROL LF!
Sun, 21 Feb 1999 17:00:23 +0000 (GMT)
Bob, I like the idea of a Low Frequency AMRAD repeater. First, we need to
leagalize it. Under lowfer part 15 rules we can't use large antennas.
Second, we need permission for at least some sort of mid-term use of an
antenna for several years. Do you sense we might get permission for this? I
don't know how this would fit into AMRAD's request for operating authority
and when we might get that.
For longer term use we need an operating concept and a utilization concept
that might convince Navy people it is worth letting us use the facility and
it is worth Navy (or some other entity like FEMA) maintaining the towers.
Not easy to come up with right now, We need to think creatively about this.
On Sun, 21 Feb 1999, Bob Bruninga wrote:
> Here is an idea to make this much easier for you guys in NOrthern VA!
> Just put together a legal-limit XMTR for LF and hook it up to the BIG
> antenna! Hook its KEY line to the PTT of a TNC with an HT listening on
> the worldwide APRS 144.39 network (only 500 feet away)
> WIth NO special programming, anyone in the WORLD can trigger it just by
> transmitting a single packet in ANY APRS network with the digipeater
> UNPROTO path of VIA WIDE,W4XXX, Where W4XXX is the MYcall of the TNC.
> >From Northern VA, you would need to transmit via WIDE,WIDE,W4XXX since
> there is so little APRS activity in northern VA and there are no IGates
> there. Each such packet will cause the LF TNC to digipeat the packet.
> But for your purposes, the PTT line is all you are interested in so the
> result is a one second KEYED burst on LF for every such packet.
> To send more complex keying modes, use a KPC-3-plus for the TNC, and then
> you can actually establish a noremal packet connecton and use the remote
> sysop commands to key a data line at any desired on/off method. Including
> setting it for a variety of preprogrammed on/off processes.
> If you have the LF transmitter, the packet set up would only take 5
> minutes to hook to it. This would sure extend your test times by several
> orders of magnitude!
> Bob, WB4APR.