Reviews For: OptiBeam OBLY 14-4 (14 el LogYagi 17-15-12-10m)
Category: Antennas: HF: Yagi, Quad, Rotary dipole, LPDA
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Registered users are allowed to subscribe to specific review topics and receive eMail notifications when new reviews are posted.| Review Summary For : OptiBeam OBLY 14-4 (14 el LogYagi 17-15-12-10m) | |||
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 | Reviews: 1 | MSRP: 1390 | |
| Description: The OBLY14-4 is a Log Yagi, not a logarithmic periodic antenna. This antenna is the bigger one of two different models für the bands 17, 15, 12 and 10m, designed to serve hams who prefer to have a separate 20m monoband Yagi. It consists of 13 driven elements, which are 180 degrees out of phase between each other, and a parasitic director which mainly acts on the 24 up to 28 MHZ range. In contrary to a logP the 13 driven elements do not follow a mathematical logarithm, this counts for their percentage difference in length as well as for their distance between each other, i.e. every single element is tuned for maximum performance, based on an iterative process. Due to the big active region of the antenna per band (capture area) the practical performance can be compared to at least four individual optimized three element monoband Yagis. But while monoband Yagis are somewhat peaky (not stable) regarding gain and pattern accross the desired frequency range and do not show a really flat SWR the OBLY14-4 shows absolutely solid gain and a very high f/b ratio across all four bands with a very low SWR. | |||
| Product is in production | |||
| More Info: http://www.optibeam.de | |||
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OptiBeam OBLY 14-4 (14 el LogYagi 17-15-12-10m)
The OBLY14-4 is a Log Yagi, not a logarithmic periodic antenna.
This antenna is the bigger one of two different models für the bands 17, 15, 12 and 10m, designed to serve hams who prefer to have a separate 20m monoband Yagi.
It consists of 13 driven elements, which are 180 degrees out of phase between each other, and a parasitic director which mainly acts on the 24 up to 28 MHZ range.
In contrary to a logP the 13 driven elements do not follow a mathematical logarithm, this counts for their percentage difference in length as well as for their distance between each other, i.e. every single element is tuned for maximum performance, based on an iterative process.
Due to the big active region of the antenna per band (capture area) the practical performance can be compared to at least four individual optimized three element monoband Yagis.
But while monoband Yagis are somewhat peaky (not stable) regarding gain and pattern accross the desired frequency range and do not show a really flat SWR the OBLY14-4 shows absolutely solid gain and a very high f/b ratio across all four bands with a very low SWR.
This antenna is the bigger one of two different models für the bands 17, 15, 12 and 10m, designed to serve hams who prefer to have a separate 20m monoband Yagi.
It consists of 13 driven elements, which are 180 degrees out of phase between each other, and a parasitic director which mainly acts on the 24 up to 28 MHZ range.
In contrary to a logP the 13 driven elements do not follow a mathematical logarithm, this counts for their percentage difference in length as well as for their distance between each other, i.e. every single element is tuned for maximum performance, based on an iterative process.
Due to the big active region of the antenna per band (capture area) the practical performance can be compared to at least four individual optimized three element monoband Yagis.
But while monoband Yagis are somewhat peaky (not stable) regarding gain and pattern accross the desired frequency range and do not show a really flat SWR the OBLY14-4 shows absolutely solid gain and a very high f/b ratio across all four bands with a very low SWR.
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