Copper Talk » Open Forum » Archived Messages » 2002 » Archived Messages 05/01/2002 to 06/30/2002 » Measurements For An Oldie But Goodie Base Antenna!! « Previous Next »

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Boxcar
Posted on Friday, April 26, 2002 - 4:30 pm:   Edit Post Delete Post    Move Post (Moderator/Admin Only)
Still trying to find those measurements for the Penetrator 500 base antenna!! I had the spec's at one time but then moved and it's gone forever. Wondering what the total height of it is supposed to be from tip to the base so I can get the lowest swr's. Any help would be highly appreciated!!!!
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707
Posted on Saturday, April 27, 2002 - 5:30 pm:   Edit Post Delete Post    Move Post (Moderator/Admin Only)
well, it's supposed to be a .64 wave antenna (64/100) so doing the math, it appears it should be 7.04m long, which is about 23.3 ft.
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Boxcar
Posted on Saturday, April 27, 2002 - 6:50 pm:   Edit Post Delete Post    Move Post (Moderator/Admin Only)
Thanks 707!! I just got some more info on this also and you are correct!! Thanks again!!
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B T
Posted on Sunday, April 28, 2002 - 12:22 am:   Edit Post Delete Post    Move Post (Moderator/Admin Only)
I have a few original manuals if you want one email me. Height should be 22' 9 1/2" and radials should be 8'9". Accepts mast of 1 5/8" OD. It will take 1500 watts and handles a 75 mph wind load. Is 5 dB gain. One just sold on Ebay for $297 this week!! (http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=1347549709)

Ben
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Boxcar
Posted on Sunday, April 28, 2002 - 9:46 am:   Edit Post Delete Post    Move Post (Moderator/Admin Only)
Hey "BT", I had seen that antenna on ebay and my mouth about dropped to the floor on the final price too. Can't believe these antenna's are going for that much but again, they are hard to find. I did have someone email me copies of the manual for that antenna so I did get the measurements on that but thanks for the offer. Appreciate the help guys!!
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Scrapiron63
Posted on Sunday, April 28, 2002 - 3:38 pm:   Edit Post Delete Post    Move Post (Moderator/Admin Only)
BT, your right my man, I just found my old paper work. When I ran one of the penetrators in the 1970s, I had the top element shorten a little, since I talked above 27.500 most of the time back then. They are great old GPs.
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RCI2990
Posted on Monday, April 29, 2002 - 2:26 pm:   Edit Post Delete Post    Move Post (Moderator/Admin Only)
WOW!!!!! thats a lot of moola for an antenna!! I paid 15.00 for my P 500 and it looks and works like new!!! Guess i saved myself some $$$. So what if mine doesnt have the stinking old moldy box it still works good.. LOL
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Funtimebob
Posted on Tuesday, May 14, 2002 - 11:51 pm:   Edit Post Delete Post    Move Post (Moderator/Admin Only)
Hmmm the only .64 wave I ever knew of was the Radio Shack one I've mentioned before on other areas. you learn something new every day. Penetrator 500....theres another one to add to my info....
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Hook948
Posted on Wednesday, May 15, 2002 - 2:01 am:   Edit Post Delete Post    Move Post (Moderator/Admin Only)
Add another to your list...I-Max2000:)
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Flash463
Posted on Wednesday, May 15, 2002 - 6:36 am:   Edit Post Delete Post    Move Post (Moderator/Admin Only)
Can anybody tell me how to set the swrs on a astroplane antenna? One of the old ones.
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409
Posted on Friday, May 17, 2002 - 4:38 am:   Edit Post Delete Post    Move Post (Moderator/Admin Only)
If the Astroplane is anything like the Astrobeam,then you can change the length of the top of the driven element to change SWR's . If possible,shorten of lengthen it as needed .