Pump up the AM/FM RF-PWR on CYBERNET PTBM121D4X radios - YouTube
MAJOR M688 (PTBM121D4X) pump up the SSB-modulation - YouTube
PTBM121D4X Page
Sean | Flickr
Cybernet "Export" Service Manual
Cybernet Cb Radio FOR SALE! - PicClick UK
RigPix Database - CB, "Freeband" and more - Tristar 747 (Mk1)
Cybernet PTBM121D4X Part2 | Manualzz
Razor Radios - RR CYB2 VCO V1.0 $40 AUD (stock or wide band available, same price). Two of these (stock) babies heading out to Colin in WA to revive some beautiful old
Cybernet PTBM121D4X modification ? - UK Vintage Radio Repair and Restoration Discussion Forum
Razor Radios - * 3 x RR CYB1 V1.2 + 2 x RR CYB2 V1.1 VCO's heading out to Graeme in Victoria! Glad to see more of these legendary Cybernet CB radios
DréCB's CB/HAM RADIO Information Site - CYBERNET MAINPRINT PTBN121A4X -
Cybernet PTBM121D4X Improvements | Cubwolf.com
PTBM121D4X Page
Cybernet PTBM121D4X problems - Page 11 - UK Vintage Radio Repair and Restoration Discussion Forum