Thanks for letting me know about that.
The gps.htm page was a very old page that didn't have a link from the index page as far as I know.
I've replaced it with a copy of the APRS TNC page to remove the PayPal button.
We don't have any stock of them or any PCBs left.
I keep the pages on the web site so that existing users have access to information and operating manuals.
Regards,
Chris
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