I've always thought a low-cost single band Software Defined Radio (SDR) might be used to convert a VHF or UHF FM Radio into an "All Mode" Receiver. Recently I came a across a low cost PLL VHF 174Mhz FM 0.2uV telemetry receiver card on ebay. So I have removed a few component to disconnect the 455khz down converter and FM limiter and then wired in the software defined radio tuned 10.7Mhz into the IF. I'm pleased to report this actually works.
Using a 48Khz USB Sound card wired in directly and the WRplus SDR Software and a Signal Generator tuned to 173.308Mhz
Signal Generator tuned to 173.328Mhz giving this reciver a bandwidth or tuning range of 24khz
10.7Mhz Local Oscillator on the SDR PCB