The PVARC’s November 5 monthly meeting via Webex double-features two 35-minute video presentations. First up, a fascinating tour of RTTY (radio teletype) that’s been a staple on HF bands for decades and now even easier with built-in RTTY decoders on newer HF transceivers or free/low-cost software using computing devices.  Second, we’ll have an interesting ARRL video on hidden transmitter hunting.  Although there ’s a recreational aspect to the latter a more serious benefit is having skills to locate stations causing interference (whether intentional or not.)