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.
