Question about Cobra Mr Hh325 Vp Handheld Vhf Radio
I have a Cobra HH325 on which we have managed to snap off the antenna. The antenna is fine but half the threads of the mount are sheared off. Has anyone obtained and/or fitted a new mount?
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Posted on Jan 02, 2017
ant. light should only come on if you have a high vswr a bad thing did you check that cb/pa switch is set to cb check your swr this is not a good place to mount ant. as it is close to metal of back of cab
Posted on Dec 24, 2008
As I understand from a tech friend of mine, most truck beds are not grounded well enough. Perhaps you could borrow/purchase a magnet mount antenna and locate it on the roof, for testing. Then you would have it narrowed down to the location.
Posted on Jan 07, 2009
SOURCE: high SWR
the problem is in the antenna cable. the lenth of a antenna cable must be divisable by 3. try replaceing cable with a 18 foot cable that should fix the problem.
Posted on Apr 22, 2009
1) if you are talking, your SWR will most likely move. You must take the reading while not modulating, (talking into the mic)
2) Window mount antenna's are GARBAGE. they are worthless. BAD BAD BAD. You wasted your money. Get a mag mount.
3) if you are not in an open lot, your SWR's will be different due to structures reflecting signal back. Always take your SWR reading in an open lot.
4) You could be experiencing Common mode currents. Normally the signal travels on the inside of the coax ground. Common mode current is when the signal is traveling back down the coax on the outside of the ground in the coax. (The biggest cause of this would be the window mount antenna). If you want to keep that garbage antenna, then you can make an RF choke in the coax. The best solution is get a better antenna. Here is how to make the choke. As close to the antenna as you can, take 6 ft of coax and loop it uniformly laying each coil next to the other. use electrical tape to hold it in place. You want 6-8 wraps. You want a nice uniform coil.
Just get a better antenna. Window mounts are the worst. You get horrible receive and horrible transmit. Get a wilson 500 mag mount. It will work so much better for you.
Posted on Apr 24, 2009
Hi and welcome to FixYa,
Which output is muffled, transmit (modulation audio) or receive audio?
If you are referring to the receive audio, initially, have you tried an external speaker? If it works good, then it would be an internal speaker problem; if not then others to check would be:
Please postback updates.
Good luck and thank you for asking FixYa.
Posted on Aug 01, 2009
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