The 1947 - Present Chevrolet & GMC Truck Message Board Network







Register or Log In To remove these advertisements.

Go Back   The 1947 - Present Chevrolet & GMC Truck Message Board Network > 47 - Current classic GM Trucks > The 1967 - 1972 Chevrolet & GMC Pickups Message Board

Web 67-72chevytrucks.com


Reply
 
Thread Tools Display Modes
Old 03-20-2017, 09:00 PM   #1
Chilly178
Registered User
 
Chilly178's Avatar
 
Join Date: May 2016
Location: Green Bay, WI
Posts: 129
Bad reception with new antenna.

Hello, the mast broke off of my antenna base awhile ago. So I go order a new OEM style one from Classic Industries. I get it all in and made sure to plug it all the way in in the back of the radio. Well the same radio station I could listen to fine most of the time on the old antenna now seems like it has worse reception. It is still listenable some of the time. I'm not sure if that is just how it is, or maybe I did something wrong? The only other issue I had with it is where the base goes over the hole in the metal the outside rubber seal on the antenna base was not quite large enough to go around the entire hole. So a little bit on both sides you can see where the rubber seal is wedged into the gap between the metal and the antenna base when the antenna is tightened down on the hole. Not a big deal right? Thoughts? http://i.imgur.com/jlLSkAC.jpg
Chilly178 is offline   Reply With Quote
Old 03-21-2017, 07:55 AM   #2
hamjet
Registered User
 
hamjet's Avatar
 
Join Date: Apr 2013
Location: South Westerlo, New York
Posts: 1,325
Re: Bad reception with new antenna.

I'm pretty sure the base of the antenna has to have a good ground to the cowl where the antenna is secured under the cowl. it might not be making good contact..
__________________
Thanks, Joe..
1969 C/10, 348 C.I., 3X2 bbl. V8, 2004r , LWB.
hamjet is offline   Reply With Quote
Old 03-21-2017, 08:49 AM   #3
dannyboy
Registered User
 
dannyboy's Avatar
 
Join Date: Mar 2003
Location: Michigan
Posts: 46
Re: Bad reception with new antenna.

Had the same issue?
__________________
1972 Chevy K20 4X4
8k Winch
Locker Gears
dannyboy is offline   Reply With Quote
Old 03-22-2017, 06:28 AM   #4
randy.powell
Senior Member
 
Join Date: Jun 2014
Location: Bushwood, MD
Posts: 510
Re: Bad reception with new antenna.

Did you "trim" the antenna to the radio?
Randy
randy.powell is offline   Reply With Quote
Old 03-22-2017, 10:10 AM   #5
Hart_Rod
*************
 
Hart_Rod's Avatar
 
Join Date: Apr 2005
Location: Pensacola, FL
Posts: 17,818
Re: Bad reception with new antenna.

Quote:
Originally Posted by randy.powell View Post
Did you "trim" the antenna to the radio?
Randy
????
Hart_Rod is offline   Reply With Quote
Old 03-22-2017, 10:18 AM   #6
tdangle
Senior Member
 
tdangle's Avatar
 
Join Date: Mar 2005
Location: Jurupa Valley, Ca
Posts: 1,208
Re: Bad reception with new antenna.

On older radios there was a "trimmer capacitor" to match antenna impedance. Mainly affected the AM band. Not sure what radio you have, but look at the sides and back for a hold with trim written next to it. If it is an old cassette radio they put it in the cassette slot. while listening to a weak station, use a small screwdriver and turn it back and forth for best reception. Talk about old school!
__________________
Terry

1970 Custom Camper/C20 , GM Crate 350/7004R, Dana 60, factory AC
tdangle is offline   Reply With Quote
Old 03-22-2017, 11:42 AM   #7
davepl
Registered User
 
davepl's Avatar
 
Join Date: Aug 2006
Location: Redmond, WA
Posts: 6,332
Re: Bad reception with new antenna.

If it's a problem with AM, check the trim as Terry says.

If it's a problem with FM, try changing the height of the antenna until you get a good signal. There's a height for most antennas that works "best" for FM, and in fact, if you had an FM radio from the factory on a Camaro (or maybe a truck) you should have a fixed mast antenna that doesn't telescope because of that.

So if it's FM, try to replicate what the factory did by finding the "right" height and that might solve some of the reception issues.
__________________
1970 GMC Sierra Grande Custom Camper - Built, not Bought
1969 Pontiac 2+2 427/390 4-speed Coupe
1969 Pontiac 2+2 427/390 4-speed Convertible
davepl is offline   Reply With Quote
Old 03-26-2017, 02:47 PM   #8
Chilly178
Registered User
 
Chilly178's Avatar
 
Join Date: May 2016
Location: Green Bay, WI
Posts: 129
Re: Bad reception with new antenna.

There is a aftermarket radio in the truck. I am talking about an FM station as well. The antenna I bought is a single piece mast. I'm starting to think it's just how it is.
Chilly178 is offline   Reply With Quote
Reply

Bookmarks

Tags
antenna, c20, radio, reception

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 06:46 AM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Copyright 1997-2022 67-72chevytrucks.com