antennas, manufacturer and size/length/hole cutout |
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antennas, manufacturer and size/length/hole cutout |
porbmw |
Apr 1 2011, 11:57 AM
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#1
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Senior Member Group: Members Posts: 814 Joined: 10-September 08 From: Vancouver, B.C. Member No.: 9,534 Region Association: None |
Somebody (won't mention names) was sufficiently astute to notice that my freshly painted, just out of the shop, blazing signal orange 914-6 had the antenna mounted on the "wrong side" (passenger side) (IMG:style_emoticons/default/dry.gif)
Sleepless nights...how could I let that one pass...and can I live with myself if I don't remedy this. Probably will bite the bullet, patch it up, and drill hole in nice, fresh paint...WTF But before I venture down that road....better see if I get things right this time around. Any advice re: a) most likely correct manufacturer(s) of antennas for 1970 model....I ask, cuz I'm betting on Hirshmann and Bosch...(blue tip???) If so, does anyone out there have nice ones... AND/OR A vendor has some nice looking NOS Poddigs...were they used... It may be a bit important at this stage, cuz I gather the Poddigs have a slightly smaller cutout/hole for mounting..... b)length of antenna....Hirshmann seems to be a tad over 90cm....Poddig has at least 2 lengths....100cm....and 150cmmmmmmmm Hmmmm Thanks for input Paul |
euro911 |
Apr 1 2011, 12:51 PM
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#2
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Retired & living the dream. God help me if I wake up! Group: Members Posts: 8,860 Joined: 2-December 06 From: So.Cal. & No.AZ (USA) Member No.: 7,300 Region Association: Southern California |
On an automobile, +/- 30 inches is typically a sufficient wave-length for the standard FM broadcast band. The AM broadcast band would benefit from a somewhat longer antenna.
Use the following equation to find the quarter-wave length for any antenna: 234 divided by f (frequency in mHz) = 1/4 wave length antenna dimension. So, 234/100 mHz (approx. center freq of FM band) = 2.34 ft (x 12) = 28.08 inches The radio in my old 64 euro 911 is a Blaupunkt AM/FM/SW (short wave) receiver ... it has a little bit longer antenna than normal and was installed by the factory, not a US dealership. I thought I read somewhere that radios in the 914s were dealer installed options (but don't hold me to it), so the location of antennas varied. The CW guys would know better than me. |
porbmw |
Apr 1 2011, 01:01 PM
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#3
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Senior Member Group: Members Posts: 814 Joined: 10-September 08 From: Vancouver, B.C. Member No.: 9,534 Region Association: None |
On an automobile, +/- 30 inches is typically a sufficient wave-length for the standard FM broadcast band. The AM broadcast band would benefit from a somewhat longer antenna. Use the following equation to find the quarter-wave length for any antenna: 234 divided by f (frequency in mHz) = 1/4 wave length antenna dimension. So, 234/100 mHz (approx. center freq of FM band) = 2.34 ft (x 12) = 28.08 inches The radio in my old 64 euro 911 is a Blaupunkt AM/FM/SW (short wave) receiver ... it has a little bit longer antenna than normal and was installed by the factory, not a US dealership. I thought I read somewhere that radios in the 914s were dealer installed options (but don't hold me to it), so the location of antennas varied. The CW guys would know better than me. I think BOTH replies have been correct re dealer installed option....which is one reason I have been waffling about covering up the passenger side hole....and drilling a new one. I think the consensus amongst those who know a whole lot more about this than I (that means just about everyone...) is that on those cars (911 or otherwise) have left the factory with an antenna, it has been on the drivers side....so tradition points to drivers side. SO that has left me on the fence, since tradition is something, but ..... And as far as that goes, I don't really expect to "show" the car....hopefully it will be nice...but it will be a driver.... BTW Nice re a SIXTY FOUR! |
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