HAM RADIO: High VSWR on Car antenna FIND & FIX. 2/70M 

My Tarheel was completely frozen to the quick release HI-Q (very good by the way) base today - had to unscrew the whole mount! Good effort on the detective work Mike. Nice kerchunk at the end. Now we want to se the autopsy of the old antenna.

Good and useful video. Looking forward to the fault finding of the antenna in part 2!

Now for the blood n guts of the post-mortem 🪛🔍 👀

👋🏻 enjoyed watching. NEW antenna ✅

I have virtually the same setup on my Mini Cooper, my mount is on the top of the back hatch on the center line of the vehicle. However I use the Diamond brand 2 meter / 440 band antenna, I believe the model number is SG 7900 ( high gain model ). Been using the Diamond band antennas for several decades. When tested for swr across the U.S. 2 meter band (144-148 mghz) the swr are petty much flat across the band and 70 centimeter is relatively low as well. Many years ago I was at an amateur radio club meeting where there was a radio demonstration inside the building. One of the club members was have trouble with swr’s, I said I will be right. I went out to my 4 x 4 pickup and pulled off my diamond antenna mounted to a large 4 magnet mount on top of the cab of the truck. Took the antenna and mount inside and attached it to the radio, the swr’s were flat when checked. I have also used the Diamond antennas on bicycles as well with very low if no swr’s. If you can get them, I would try the diamond antennas, I personally have had great success with this brand of antennas!

Nice video Mike great work nice antenna too. 👍🏻 Motters 73 👍🏻

It'll be interesting to see the reason for the failure Mike. 73 de GØUSL

Good video! You might want to look at the NanoVNA. Only about $70 and is a great tool to have! It would have been great for this.

Hi Mike that rg176 looks to be the right size to tie something or someone up great choice for the car cheers deW9US 😎😎😎

Next video, repair the antenna !!

Either broken center conductor in the coax on either end or a possible short circuit in the coax next the antenna may have a small disc capacitor in it thats blown

Fixing the sleep mode is simple on the 102 meter. Push and hold the blue button until your in the menu, select item #2 and then adjust the timeout from 1-9 minutes.

FIRST!

Thanks Mike!

Hi Mike... Great vid... I'm about to fit a boot mount on my car but standard coax is to large..Where did you get your mount from with the thinner coax on it.. Appreciate any info please...M1bsz. Graham...

thanks for the video

i think you need someone to help you , However don't worry i am here for 100 Pound Per Video 😎

To hell with continuity. Take the antenna off and put a dummy load on the mount. Good SWR=good cable and mount. Next suspect...

I had a problem at the back of my radio once with high SWR. Right where the coax makes a hard turn out the back of the radio, It became barely shorted but eventually shorted completely 100% from the outside shield to center conductor. SWR went off the scale. To solve the issue I put in a new coax and installed an PL259 Elbow on my Stryker 955. Mike is 2/70 bands what most Ham operators run in their cars?

great video... the only thing that bugged the heck out of me was that you kept referring to "swr'ing the antenna".... now i *DO* know what you meant, but swring the antenna is not what you're doing (it doesnt exist) - you're tuning it :D but i digress ... i guess we should all be lucking you wasn't SWARING the antenna lmao

Don't bother to clean yourself up a bit for the videos.