Thanks for the response Robert. On the PK232, I currently have it setup as Simply(KISS), though I once all the kinks are worked out I would like to set it up as KISS with appropriate start/stop commands. The Mobilinkd was Simply(KISS), too.
The port settings on the PK232 are as follows:
Quiet time: 0
RFBaud is 1200
RF to IS is checked
IS to RF is checked
Enabled is checked
Xmit Enabled is checked
Beacon is checked
Under device, I have it on the correct com port, set for 9600 baud (which is what I have the PK-232 set for). No parity, one stop bit. I initially set it up with 7 data bits (which worked fine), then I set 8bit conversion to "on" on the PK-232 based on some of the recommendations on the web, and made the corresponding change in APRSIS32 to 8 data bits, and that worked just fine as well. Same issue with stopping RF receive after a period of time either way.
Thanks for your thoughts on this. I'm also happy to set and paste any logs that would be helpful in diagnosing the problem.
I know this isn't a commercial tech support line, so thank you to you and everyone responding to help me troubleshoot this. I appreciate it.