Author Topic: Telescoping Antenna  (Read 2683 times)

lakeholme

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Telescoping Antenna
« on: June 11, 2013, 03:44:15 PM »
http://www.camaros.org/forum/index.php?topic=10918.0;all

So, did the telescoping antenna fully extend to a height of 30 inches?
Did it have the same ball tip/
Does anyone have a picture?
Phillip
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paceme

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Re: Telescoping Antenna
« Reply #1 on: June 11, 2013, 05:34:49 PM »
On AM you adjust the antenna height so that you tune the RF circuit. This helps optimize reception for the mixer-oscillator stage. Since the FM antenna is fixed height, you optimize/tune the am signal with a trimming pot on the radio itself. Usually there is a label noting "trimming pot" with an access hole located on the radio case.
Steve Shauger
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JohnZ

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Re: Telescoping Antenna
« Reply #2 on: June 11, 2013, 05:46:15 PM »
The AM telescoping antenna isn't round - it's an aerodynamic shape, like a wing, including the tip; fully extended it's 46" long, and collapsed it's 18" long. Photo below.
'69 Z/28
Fathom Green
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lakeholme

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Re: Telescoping Antenna
« Reply #3 on: June 11, 2013, 08:29:11 PM »
Thanks, John! That's exactly what I was trying to confirm.
Phillip
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paceme

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Re: Telescoping Antenna
« Reply #4 on: June 12, 2013, 12:20:44 AM »
Yes the AM antenna mast is elliptical. Just a note, I've seen original cars come with the tip lined and without a line. There was discussion that the replacement antennas did not have the line on the tip, but believe they came both ways.  The attached pic shows 3 old antennas I collected over the years with plenty of patina. The middle one has the lined tip.
Steve Shauger
Vintage Certification™ Program, Providing Recognition And Status To Unrestored Vehicles. Website www.vintagecertification.com

lakeholme

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Re: Telescoping Antenna
« Reply #5 on: June 12, 2013, 12:32:39 AM »
Paceme, thanks for the pic.

So was the base the same for both fixed and telescoping?
Phillip
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paceme

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Re: Telescoping Antenna
« Reply #6 on: June 12, 2013, 01:58:35 AM »
Yes
Steve Shauger
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Rick68

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Re: Telescoping Antenna
« Reply #7 on: June 12, 2013, 12:10:48 PM »
I have an antenna I bought years ago that is oval/elliptical shaped except for the very last section that extends.That part is round with a ball tip.Someone told me that it is off a Pontiac Firebird or is it a service replacement or an aftermarket antenna?

JohnZ

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Re: Telescoping Antenna
« Reply #8 on: June 12, 2013, 01:42:06 PM »
Yes the AM antenna mast is elliptical. Just a note, I've seen original cars come with the tip lined and without a line. There was discussion that the replacement antennas did not have the line on the tip, but believe they came both ways. 

I tend to agree with that - the AM antenna that came with my car appears to be the original (like virtually everything else is), and it doesn't have the little line in the tip.
'69 Z/28
Fathom Green
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z28z11

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Re: Telescoping Antenna
« Reply #9 on: June 13, 2013, 01:42:48 AM »
My original is lined, as are the 4 examples of NOS adjustable masts in the pics that follow. 3 are '69's, 1 is a '68, and the 5th mast (at the top, barely visible) is an NOS AM/FM. The '68 mast is exactly .375" shorter in overall length, plus the mount is threaded rather than a splined fit.

These are/were in original GM packaging purchased from GM dealers - 100% positive they are NOS GM.

'69's are 19.375 OAL, '68 is 19.00" OAL. AM/FM fixed mast is 31.500 OAL.

Regards,
Steve
1968 Z28 M21/U17 BRG/W
1969 Z28 X77/M20/VE3 LeMans/W
1969 L78 X66/N66 Cortez/BVT
1969 Z11 L48/M35/C60/C06

1967RS/SS

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Re: Telescoping Antenna
« Reply #10 on: June 13, 2013, 02:08:38 AM »
Don't know if my antenna is original to my 67 but here are a couple pics of my AM rear antenna tip and base






1967 RS/SS L-48
Van Nuys 01C
Joe

lakeholme

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Re: Telescoping Antenna
« Reply #11 on: June 13, 2013, 01:28:18 PM »
I'd be interested in knowing if 1967RS/SS's tip is a replacement or original? I've seen several of those "screw tips" on a variety of cars.
Phillip
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Ed_B

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Re: Telescoping Antenna
« Reply #12 on: June 13, 2013, 02:22:49 PM »
Quote
I'd be interested in knowing if 1967RS/SS's tip is a replacement or original? I've seen several of those "screw tips" on a variety of cars.

That's an aftermarket antenna.

Ed

lakeholme

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Re: Telescoping Antenna
« Reply #13 on: June 13, 2013, 03:55:41 PM »
Thanks, Ed. Do you know any details?
Phillip
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Ed_B

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Re: Telescoping Antenna
« Reply #14 on: June 13, 2013, 04:23:16 PM »
I'm not sure what you mean by details Phil.

Ed