Annapolis REMOTE CONTROL LF!

[Bob Bruninga]

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.