UHF Antenna Gain Comparison Charts

[trombo]

UHF Antenna Gain Comparison Charts


All gain figures are Net Gain in dBi, which is the default standard for computer design and modeling software.
Code:
Gain Figures For Similar Large-Sized UHF Antennas

Channel 4228 4228HD PR-8800 DB-8 DBGH M-8

14 10.00 13.15 12.50 11.00 14.34 14.93
19 12.00 13.75 13.70 12.00 17.17 15.63^
27 14.00 13.85 14.50 13.50 17.83 16.40^
35 15.50 13.05 14.40 14.20 18.26 16.77^
43 15.70 13.25 12.00 15.00 16.53 17.07^
52 15.00 13.85 10.50 16.00 8.92* 17.25
60 14.00 13.85 10.00 16.60 NA 16.07Notes:

CM4228 is the original Channel Master 8-bay bowtie reflector (data from HDTVPrimer site)
CM4228HD is the new Channel Master 8-bay bowtie reflector (data provided by CM to videobruce - a DHC member. Assumed to have been in dBd)
PR-8800 is an 8-bay bowtie reflector made by Winegard (data from HDTVPrimer site)
DB-8 is an 8-bay bowtie reflector made by Antennas Direct (data from HDTVPrimer site)
DBGH is a Double Bay Gray Hoverman (data from 300ohm - a DHC member)
* is the listed gain on Channel 51 (antenna not designed for 52 and higher)
M-8 is a DIY 8-bay 52x40 5 inch space angled Reflector & Elements 17in 450 ohm feed (data from mclapp - a DHC member)
^ is the listed gain on the next highest channel since tables did not match all channels
The new Channel Master 4228HD is outclassed by all the other antennas in the chart in most of the UHF spectrum. It is not a bad antenna; it is just an also-ran. The two Do-It-Yourself antennas (the DBGH and the M-8) are clearly in a league of their own.

[trombo]

Comparing Medium Sized UHF Antennas

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All gain figures are Net Gain in dBi, which is the default standard for computer design and modeling software.

Code:
Gain Figures For Similar Medium-Sized UHF Antennas

Channel 4221 4221HD PR-4400 DB-4 SBGH M-4

14 9.50 13.05 9.00 5.00 14.24 9.87
19 10.50 12.75 10.00 7.50 14.74 13.52^
27 11.50 12.45 11.00 10.25 14.61 14.91^
35 13.00 13.55 12.00 11.40 14.75 15.91^
43 13.50 15.05 12.50 12.10 15.30 16.75^
52 14.20 13.75 13.00 12.85 15.03 16.21
60 15.00 15.15 14.00 13.20 NA* 13.85

Notes:

CM4221 is the original Channel Master 4-bay bowtie reflector (data from HDTVPrimer site)
CM4221HD is the new Channel Master 4-bay bowtie reflector (data provided by CM to videobruce - a DHC member. Assumed to have been in dBd)
PR-4400 is a 4-bay bowtie reflector made by Winegard (data from HDTVPrimer site)
DB-4 is a 4-bay bowtie reflector made by Antennas Direct (data from HDTVPrimer site)
SBGH is a Single Bay Gray Hoverman Gold Standard (GH10 data from j3d - a DHC member)
* antenna not designed for 52 and higher
M-4 is a DIY 4 Bay 40x44 14 inch Reflector spacing fwd ele & refl (data from mclapp - a DHC member)
^ is the listed gain on the next highest channel since tables did not match all channels
As you can see, the SBGH takes the lower range handily, and the DIY 4-bay by mclapp easily pulls away in the mid to high range.