[MRCA] Gilbert Broadband VHF Antenna Purchase - Slightly OT

Alex J Rokowetz belarok at yahoo.com
Tue Sep 20 22:35:52 EDT 2016


When I was 12 years old, I got my first fishing rod.  It was a Shakespeare and I promptly took it down to Captree and caught myself a fish. I still have it and it still catches fish.  Who knew that all these years later I would have matching antennas. 
Now if I could only figure out to to fish and do radio at the same time...
AlexK2AJR

      From: KA1LHZ <sboard.ka1lhz at gmail.com>
 To: comcast <kg2bz at comcast.net>; B. Smith <smithab11 at comcast.net> 
Cc: mrca at mailman.qth.net
 Sent: Tuesday, September 20, 2016 2:51 PM
 Subject: Re: [MRCA] Gilbert Broadband VHF Antenna Purchase
   
 Shekespeare used to make cheap chicken band and marine antennas. DE KA1LHZ
  
 On 09/20/2016 01:15 PM, comcast wrote:
  
 
  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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