[MRCA] Gilbert Broadband VHF Antenna Purchase
comcast
kg2bz at comcast.net
Tue Sep 20 13:15:04 EDT 2016
manufacturer is shakespeare. looks like the 4265. 118 to 174 gain antenna 60 W power
Jeff KG2bz
Sent from my iPhone
> On Sep 20, 2016, at 10:35 AM, B. Smith <smithab11 at comcast.net> wrote:
>
> Several of us purchased the VHF "broadband" antennas at Gilbert. I got mine for $15 bucks because the data plate was scratched and the plastic tip was missing. ;-)
> I am not a big fan of SWR but a quick check across two meters (144-148) resulted in a low 1.4-1.7 SWR with 10 feet of RG-58 feed line and then tuning my analyzer lower in frequency the antenna is usable for my purposes on UNICOM. Tuning higher in frequency to 225 Mcs still got a fairly low SWR. I guess I will have to do one of those graphs and also see the effect of feedline length.
> On the two meter frequency of 145 Mcs even a 1.7 SWR would not result in that much of a feed line loss and my Older GE MVP APRS transmitter probably would not care.
> My antenna data plate was scratched and the lower frequency I assume is 116 or 126 or 136?? Measuring a total length of around 36 inches it looks like a end fed half wave which would not require a large ground area. But I do smell a internal "voltage" balun of which I am not very fond of. But there is "no free lunch" :-\
>
> See attach photos (2) of antenna and data plate.
> Anyone else have any info? Any research?
>
> Z
> <mdbflhbgacpnpgbg.jpg>
>
> <lefobpdpcojalcac.jpg>
>
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