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Author Topic: Telescoping Antenna  (Read 1850 times)
lakeholme
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« on: June 11, 2013, 10:44:15 AM »

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?
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Phillip
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paceme
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« Reply #1 on: June 11, 2013, 12:34:49 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.
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Steve Shauger
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JohnZ
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« Reply #2 on: June 11, 2013, 12:46:15 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.
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lakeholme
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« Reply #3 on: June 11, 2013, 03:29:11 PM »

Thanks, John! That's exactly what I was trying to confirm.
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Phillip
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paceme
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« Reply #4 on: June 11, 2013, 07:20:44 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.  The attached pic shows 3 old antennas I collected over the years with plenty of patina. The middle one has the lined tip.
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Steve Shauger
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lakeholme
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« Reply #5 on: June 11, 2013, 07:32:39 PM »

Paceme, thanks for the pic.

So was the base the same for both fixed and telescoping?
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Phillip
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paceme
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« Reply #6 on: June 11, 2013, 08:58:35 PM »

Yes
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Steve Shauger
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Rick68
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« Reply #7 on: June 12, 2013, 07:10:48 AM »

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?
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JohnZ
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« Reply #8 on: June 12, 2013, 08:42:06 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. 

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.
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z28z11
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« Reply #9 on: June 12, 2013, 08:42:48 PM »

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
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1967RS/SS
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« Reply #10 on: June 12, 2013, 09:08:38 PM »

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






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lakeholme
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« Reply #11 on: June 13, 2013, 08:28:18 AM »

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.
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Phillip
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Ed Bertrand
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« Reply #12 on: June 13, 2013, 09:22:49 AM »

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
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lakeholme
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« Reply #13 on: June 13, 2013, 10:55:41 AM »

Thanks, Ed. Do you know any details?
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Phillip
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Planning 2016 Sentimental Tour, AACA (and restoring a 40 Buick Special for it)
AACA Southeastern Division Spring Meet Chair
"Charlotte AutoFair, presented by the Hornets Nest Region, AACA, is the largest and greatest Collector Vehicle Event in the Southeast USA."
Ed Bertrand
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« Reply #14 on: June 13, 2013, 11:23:16 AM »

I'm not sure what you mean by details Phil.

Ed
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