[GreenKeys] some rtty demod boards available

[epvgk at limpoc.com]

Hey folks, 

A few people asked about getting more of the RTTY demodulator boards I did a couple
years ago, so I made another small run of 30 in case anyone's been waiting. 

This time I'm going to try with an online storefront via Square, rather than having
people paypal or mail me checks, because that was a bit of a headache last time. 

So if you'd like to get in on the fun, try:

 https://squareup.com/store/epv-greenkeys

NOTE: These are the RTTY demod boards, for keying a TTY loop from an audio source
such as a radio or the ITTY service. They are NOT the USB serial adapters, which 
should be arriving next week some time. Once I've received and tested them, I'll
add them to the storefront and post an announcement. 

Apologies if there are any hitches with the storefront thing - this is the first time
I've tried it. Please email me if there are any problems. 

eric