UHF AERIAL HELP REQUIRED

I woulnt advise such a thing - if the aerial IS failing and the SWR is incorrect and he tries to transmit he will blow the transmit finals

KiwiAngler
Geez I didn't know you were a radio expert, I can assure you it won't do any harm with a couple of tests , over a prolonged period yes, I have helped people out in the past with problems and when I find what they have done and how long it has been like it and the radio is OK then the radio should should have exploded many times over going by your beliefs, Trial and error mate , works for me , always has, and always will.

Hi Doug
What Kiwi is saying happened to me. Replaced aux batt and crushed and cut cable
blew the transmit side of a brand new gme 3200 in less than a minute and took it to gme and they confimed this. Had radio fixed and am now very careful with coex cable.
regards ross

Doug

Not sure where I professed to be a 'radio expert' - not looking for your assurances - just saying that ,from my experience, I wouldnt do what you suggested nor would I suggest it to others.

thanks mike that was what i was looking for. when testing the cable i had both ends cut off and made sure there was no inner and outer wire touching to produce a short circuit

Sorry, should have been clearer, was out with a couple of other vehicles who only had hand helds. I could hear them but was crackly even when in sight about 1km behind them. I eventually turned my unit off and tried my hand held unit and presto could hear them clearly. should have said also it is a uniden head unit with a gme aerial (the type with metal base about 300mm long mounted on spring with a fibreglass tip.) have had unit in this vehicle for about 12 months and in previous vehicle for about2 years with no problems.

Sounds like a ground independent type with an elevated feed. Thus you can expect a closed circuit reading on your multimeter.
For what it is worth, the CB transmission is AC (alternating current) at 477 million cycles per second (477 mHz). The multimeter is testing at DC (0 Hz). What appears to be a closed circuit at DC can be a reactive (AC terminology for restive) circuit.
Antenna could still be damaged internally.
Test the coax without the radio or antenna connected first. Check for continuity of braid & inner wire plus resistance between them. Continuity readings should be zero ohms & resistance between should be open circuit.
If that tests out OK, try knocking up a simple 1/4 wave ground plane antenna to try it out. Connect the inner conductor of the coax to a vertical bit of wire about 150mm long and the braid to 3 or 4 similar length horizontal radials.

Hi reddog
1st what brand of radio and brand and type of antenna you have,try gutting the ends off at each end since you have the multimetre out test there is no continueity between the inner and out that will say that they are not touching any where between each end if thats all good then its the connectors you have got ,or in the radio end where the connector plug goes (pl4702 plug) something (pl) plug goes or last is the antenna.
just check these areas and hope you find the hickup
Cheers pat