If a VHF/UHF Combo antenna manufacturer "forgets" to provide an FM Gain spec
number, it is very likely the antenna is NOT designed for the FM Band, such as
is shown in the "Raw gain for some common VHF antennas" chart for the
W-G YA-1026 ("C" line) and R-S VU-90 (brown "L" line) antennas:
Note that CM-3671 had highest FM Gain (not quite 5 dBd) among the modeled
VHF/UHF Combo antennas....which MIGHT be very close to W-G HD8200
(which was NOT modeled here and does NOT specify Gain in the FM Band).
Unfortunately, some Combo manu's, such as Antennacraft, only indicate
a Gain spec for the VHF Band (Ch2-6+FM)...which MIGHT be average,
minimum or (more likely) maximum (for the "best" freq. in the band),
making it impossible to determine Gain in the FM Band.
For a Multi-Band Combo antenna, the number of VHF-ONLY
might be a good indicator of relative VHF performance....but may or
may NOT indicate relative FM performance, depending on whether the
manufacturer intended to provide good FM performance....or whether
the engineers were trying for the best Ch2-6 TV performance and were
satisfied to accept whatever Gain remained in the 20 MHz wide FM Band.
And, of course, in an FM-ONLY antenna, ALL of the elements are dedicated
to enhancing Gain in that band, rather than being spread thin trying to
provide Gain over all BOTH Ch2-6 and FM Band.
K6STI (Brian Beezley) modeled performance for many FM antennas, with
dimensions available in the EZNEC file if you want to build your own:
The fol. website summarizes manu. specs for many FM Antennas:
And here is an even better website, which was recently updated:
You will find that most of these FM antennas are no longer in production.
Also be careful whether specs are in dBd or dBi, where dBi = dBd + 2.15 dB.
W-G HD6065P may be highest (7-8.6 dBd) Gain for readily available FM Antennas.
BTW: Weak Ch7-13 TV reception can be blocked when strong FM signals are
passed through a common Preamp due to Second Order Harmonic of FM signals.
Third Order Intermod products between FM signals can also degrade Ch5 & Ch6.
Hence it is best to use a separate coax downlead (and optional Preamp) for FM,
esp. since they tend to be scattered around the countryside, vice on mountain tops.
This might also reduce loss by about 1 dB due to elimination of band separators.