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
_______________________________________________
Elecraft mailing list
Post to: [email protected]
You must be a subscriber to post to the list.
Subscriber Info (Addr. Change, sub, unsub etc.):
http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/subscribers.htm
Elecraft web page: http://www.elecraft.com
