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stampeder · 2009-01-16, 12:42 PM

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.

2009-01-16, 12:42 PM	#2
stampeder OTA Forum Moderator Join Date: Jan 2005 Location: North Delta, BC Posts: 18,944	Comparing Medium Sized UHF Antennas 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. Last edited by stampeder; 2009-01-16 at 02:55 PM.