Image

Cobra 29Ltd classic

This is the place to post your general tips, or need to have a question on your install here.

Moderator: JR Moderator

User avatar
Iceman88
NEW DUCK
NEW DUCK
Posts: 1
Joined: Saturday, 03 March 2018, 21:05 PM
Name: Vlad Visan
Cell Phone: 6478597751

Cobra 29Ltd classic

Post by Iceman88 » Sunday, 04 March 2018, 8:43 AM

N00b here. Got a Cobra 29Ltd classic radio coupled with K30 antenna (3ft high i think). I tuned according to radio specs. However, at channel 27 the antenna light comes on. By the time I get to ch30, it's full solid red.

I can't seem to receive anything, and didn't try to send until i can receive.

Any help will be greatly appreciated.

PS: antenna is installed next to my Durango radio one about 3-5inch distance.

[ Post made via Android ] Image


User avatar
295 antenna
Mod Duck
Mod Duck
Posts: 582
Joined: Sunday, 23 October 2016, 21:45 PM
Radio: optima ,cobra 148ex
Antenna: patriot,brownig
Name: Charles Reney
Cell Phone: 760-672-1257

Re: Cobra 29Ltd classic

Post by 295 antenna » Sunday, 04 March 2018, 18:58 PM

Hello Iceman: in order to answer your question what is the antenna mounted on? Is it a magnet mount ?

Please stop by the forum here and introduce your self im sure somebody here can help.

another thing is this:If the SWR on channel 40 is higher than that on channel 1, your antenna is too long.
If the SWR on channel 1 is higher than that on channel 40, your antenna is too short. Are you using a meter using a meter ?
Keep smiling ...It makes people wonder what your up too !

American eagle member : AE1577
TWRC Member : WR2950



User avatar
sonoma
Donor
Donor
Posts: 1352
Joined: Sunday, 02 April 2006, 14:10 PM
Location: Oklahoma

Re: Cobra 29Ltd classic

Post by sonoma » Sunday, 04 March 2018, 19:31 PM

what is the swr on 40 and 1? having it so close to the other antenna can cause a problem with swr. on transmit but not receive. you will also find that a 3 foot antenna does not receive or transmit as good as a 4 foot antenna. but 1st let us know what the swr reading is. do not just say you tuned it to spec. what meter are you using to check the swr with or are you just relying on the one built into the radio.

User avatar
MDYoungblood
Moderator
Moderator
Posts: 7402
Joined: Saturday, 12 June 2010, 19:05 PM
Logged in via: iPad
Radio: Uniden Washington
Antenna: Avanti Sigma II
Name: Greg
Location: Baltimore, MD
Contact:

Re: Cobra 29Ltd classic

Post by MDYoungblood » Sunday, 04 March 2018, 19:55 PM

Hello Iceman88,
Welcome to the forum. The K30 is a short antenna, not quite 3 feet so adjusting it does create a problem. The best way is to get channel 19 or 20 to the lowest SWR possible then balance out channels 1 and 40 to be the same. Like 295 said the antenna is probably long, most antennas are made that way on purpose, so trimming might need to be done. When trimming cut the whip in 1/4" segments so as to not cut off too much. After you have it adjusted the ends of the band are still going to be higher than the middle because of the antennas design, no getting around it.

3's

Greg
"321, the Middle of Maryland"

23 AM "WORLD WIDE" 38 LSB

Strong Supporter of America's Original Homeland Security Act
The Second Amendment



Official Moderator - CBRT Complaint Department




Post Reply Previous topicNext topic

Who is online

Users browsing this forum: No registered users and 2 guests