Thank you Danny! It would be great to see a photo of your Tesla with the COMPACtenna on it. Very cool!

Check out my upcoming follow up video they are both swept on an anritsu

Hi Scott, Some have found adequate capacitive coupling to vehicle metal counterpoise with such type of clamp-on mounts. Mounting near a top corner of the vehicle is generally best. Other types of mounts that work well include: Magnet mounts that are low profile typically do best; the LAIRD GB8PI is a good option. L-Bracket (NMO) mounts with screws; a variety of types are available including adjustable style. Thru-hole NMO mounts. [For mounts where holes are involved, it is often helpful to start with a magnet mount to get a general idea of SWR at approximate location before proceeding; magnet mounts provide capacitive coupling even to aluminum roofs.]

Good question, Lance. The answer is: YES, this COMPACtenna model SCAN-III covers the 2 meter & 440 Ham Bands, AND does an Exceptional job on GMRS: (from the specification sheet) - - - Also superb for Transmit/Receive on MURS (151-155 MHz) and GMRS (462-467 MHz) as well as Ham Radio 2 Meter/440 MHz Bands (V)SWR: nominal

Hello Adam, and thank you for your interest. There are a variety of types of mounts that the COMPACtenna SCAN-III has been used on with success. Please see the INSTALLS page of COMPACtenna.com : compactenna.com/installations/ Have a Great Summer! Dr. Jack, N8NDL

Through-Hole mounts have been found to work optimally more consistently than many other types. This style of mount commonly provides good juxtaposition between center and shield lead connections to antenna and ground plane counterpoise, which is particularly important with VHF/UHF, and they don't have the challenge of adequate capacitive coupling to ground plane counterpoise that some other style mounts can have, particularly at HF frequencies. L-Bracket & Adjustable attached-to-vehicle-metal with screws type mounts are also favorites by many for similar reasons. As can be seen by the formulas, etc. on my website, magnet mount capacitive coupling is often quite good at VHF/UHF and some HF frequencies. For VHF/UHF, 'flatter style' magnet mounts may work best, especially at UHF frequencies. Some report that lip-style mounts that are made with increased surface area metal (plate structure) work better; this is understandable in that such can provide increased capacitive coupling to vehicle sheet metal.

Hi Knut. Model 2M/440+ reviewed in QST August, 2022 (page 49-50) as seen on COMPACtenna website home page: Maximum Power Rating: 100 Watts 2 Meter Band; 75 Watts 440 Band [Maximum Duty Cycle at max. power rating: Maximum total transmit time of 1 minute in any 2 minute period. Maximum Ambient temperature rating 130 degrees Fahrenheit. Hotter conditions such as higher ambient temperature, sun exposure, lesser air flow, etc. decrease duty cycle.]