Hy-Gain VB-25FM
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| Frequency | 144-148 MHz; 4 MHz bandwidth at 2:1 per the manual |
| TX power | 500 W (250 W continuous / 500 W peak) |
| Modes | FM, SSB, CW, digital |
| Connector | coaxial balun matches the 200-ohm hairpin-fed driven element to 50-ohm coax |
| feedpoint | beta (hairpin) match at 200 ohms via supplied coaxial balun to 50 ohms |
Estimated (unverified): production status (storefront and dealers actively list it despite the brand's 2024 manufacturing halt - stock vs new production unknowable from outside)
The cheap decisive upgrade for FM range problems: five vertically-polarized elements pointed at the distant repeater do what no power increase can, from three pounds of antenna a TV rotator spins. The hairpin-plus-balun feed arrives sorted, the whole band fits under 2:1, and assembly is an hour including coffee.
Vertical polarization makes it an FM specialist - point it at weak-signal SSB/CW work and the cross-polarization loss erases the gain. The factory's 11.3 dBi is the top of what modeling supports - believable, if cheerful - and a beam plus rotator solves a problem many FM users could solve by just picking a closer repeater.
For the operator at the fringe of their favorite repeater's coverage, this is the correct hundred-and-change purchase: aim it once and the S-meter argument is over. Weak-signal enthusiasts want its horizontal SSB siblings instead.
The VB-25FM solves the most common VHF problem - 'the repeater I want is just out of reach' - with the bluntest tool: five elements of vertically polarized Yagi pointed at it. The vertical mounting is the design statement; FM operation lives on vertical polarization, so the antenna gives up nothing to cross-polarization where repeaters and mobiles are concerned, and the factory table claims 11.3 dBi (their own parenthetical: 9 dBd) with 20 dB of front-to-back from the 75-inch optimum-spaced boom - and for once an audited spec sheet survives contact with the modeling literature: independent boom-length analyses put optimized five-element designs on this boom at 10 to 11.5 dBi, so the factory figure sits at the believable top of the range rather than beyond it.
The construction is classic Hy-Gain small-beam: solid 3/16-inch rod parasitic elements through the boom, a hairpin beta match presenting 200 ohms to the supplied coaxial balun, 2.9 pounds total on a 73-inch turning radius. Any television rotator spins it; determined operators just clamp it pointed at the one repeater that matters. The whole band sits inside the 4 MHz 2:1 bandwidth, and 250 watts continuous covers every FM rig and brick amplifier in plausible use.
The specialist framing cuts both ways: for weak-signal 2 m work - SSB, CW, contesting - horizontal polarization rules, and that market belongs to its horizontally-mounted relatives like the long-boom weak-signal Yagis and the Boomer class. The VB-25FM is the FM utility beam: hospital nets, EOC links, the cabin at the edge of coverage. Brand-wise it shares the Hy-Gain ITU-transition limbo, but unusually for the catalog it remains actively listed at $129.95 with dealer stock - whether that is deep inventory or quiet production, the antenna is, practically speaking, buyable today, priced like the commodity it proudly is.