[Elecraft] T1 wireless control

[Leigh L Klotz, Jr.]

On the heels of the K2 wireless KIO2 discussion, I thought I would share 
some partly-baked ideas on T1 control.

I noticed that Microchip makes a line of PICs with ISM-band transmitters 
in them.  The T1 uses a 2-channel control with its own modulation, and I 
wondered about making a wireless dongle for the 817, the idea being to 
locate the T1 at the antenna end of the coax, as this seems to be the 
answer so so many problems with deploying multi-band antenna systems.

Along the way I found quite a few encoded and OOK boards and systems for 
remote control.  The simplest were $9 boards with 300MHz transistor 
oscillators, up to more complex oens with multi-channel modulation built 
in.  It seemed like just directly driving the T1 with OOK would be 
problematic due to noise rejection, so my idea of a one-chip solution 
would still require the PIC to do some encoding on the rig side, and a 
bit of work on the T1 side as well.

Here are some URLs for perusal:

418MHz and 434MHz ASK transmitters, 4 pins and tiny.  2" receiver 
module.  Tiny surface-mount transmitter module.  Also 315MHz devices. 
All in the $10 range
http://tinyurl.com/9o8z5

Sample use of Holtek encoder
Http://tinyurl.com/873jr

RFPIC Forum
http://forum.microchip.com/tm.asp?m=82165