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Post by MonkeyMan on Oct 9, 2015 11:59:34 GMT -5
These are on the roof of the former Harp Taxi Company in Pottstown. It's the antenna on the right that is quite interesting to me. It's hard to see in this pic, but there is a lower portion that is the exact opposite shape of the upper, and from close up you can see that it's center fed. It's seems obvious that it was used for the taxi radio service, but I searched the internets high and low and couldn't come up with a match. Antenna experts, what say you?  |
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Post by MonkeyMan on Oct 9, 2015 13:22:19 GMT -5
Another angle courtesy Google street view...  |
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Post by spitfire441 on Oct 9, 2015 19:15:03 GMT -5
That is an interesting antenna. It is a caged dipole, that gives it more bandwidth. Question is what band and why broadband it? It also appears to be another wire dipole on the same mast separate from what I can see of the other dipole up top. Wire dipole below or part of the top as a whole?
Is this currently on a building in PP town? If so post an address so I can see it in person.
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Post by MonkeyMan on Oct 9, 2015 22:04:00 GMT -5
Currently Meyers Automotive, 18 S. Hanover St between the railroad tracks and High St. Look up, you can't miss it. This was a former cab company so I assumed taxi radio service. I'm no antenna expert, but I've never seen another like it.
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Post by MonkeyMan on Oct 9, 2015 22:12:14 GMT -5
Note, the lower wire portion is the exact opposite shape of the upper portion. Coax appears to be fed in just above the lower wire portion. I assumed it was all one antenna. Been looking at it for years.
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Sandbagger
Administrator/The Boss 
Posts: 6,247 
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Post by Sandbagger on Oct 10, 2015 17:06:26 GMT -5
Another angle courtesy Google street view... This looks like a bi-conical design. Extremely wide banded, but not a heck of a lot of gain. They're used a lot for measuring radiated emissions, across a wide band of frequencies. |
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Post by doctor on Oct 10, 2015 19:58:36 GMT -5
By the look of the buildings, and I bet the taxi service was in the 1960", it was on taxi frequency maybe near 145 fm , fixed channel, the FCC moved the service but not sure what year. We had a taxi service who had maybe 25 units and got rid of all of them $10 bucks each, and a twist of peaking, and a set of crystals everybody in town was on 146.52 fm, a lot of fun in those days, yes I owned one for that price, I was on 2 meters... DOCTOR/795  |
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Sandbagger
Administrator/The Boss
Posts: 6,247
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Post by Sandbagger on Oct 10, 2015 20:40:38 GMT -5
By the look of the buildings, and I bet the taxi service was in the 1960", it was on taxi frequency maybe near 145 fm , fixed channel, the FCC moved the service but not sure what year. We had a taxi service who had maybe 25 units and got rid of all of them $10 bucks each, and a twist of peaking, and a set of crystals everybody in town was on 146.52 fm, a lot of fun in those days, yes I owned one for that price, I was on 2 meters... DOCTOR/795 The problem with that theory is that that antenna looks to be too big for VHF-Hi frequencies. Perhaps low-band VHF? |
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