Where can I get Frequency counter for the Stryker SR-497HPC? Shawn February 07, 2017 17:17 Search the internet for a FC390 or FC30 frequency counter. Related articles SR-447HPC / SR-497HPC Setup Guide What are the dimensions of the 655 & 955? SR-447HPC2 Setup Guide My radios is off frequency on transmit and receive Fuse size (amps) for SR-497HPC? Comments 0 comments Article is closed for comments.