[Antennas] Identify this antenna ? (DECIBEL DB201-H) !

[Demetre Koumanakos]

I found the Decibel site, the antenna is the DB201-H, managed
to find a couple of documents, apparently there is no coil in the
base.
The dimensions are a bit confusing on this antenna, the model is a 170 
Mc antenna and should have 44 cm radials, just as the radiator (base to 
bending tip) should be for this frequency. 
The dimensions here are 40 cm radiator (this would make the radiator 
freq. 180-185 Mc) and the radials 71 cm (105 Mc) ???
Any idea why the antenna dimensions are so strange???

73
Demetre - SV1ENS


> Is there a model number anywhere on the antenna?
> Decibel is still in business and has a web-site.
> 
> 73,
> Randy
> WX5L
> 
> 
>> 
>> From: "Demetre Koumanakos" <demetre at fastmail.ca>
>> Date: 2005/01/06 Thu PM 05:13:38 GMT
>> To: Antennas at mailman.qth.net
>> Subject: [Antennas] Identify this antenna ?  "DECIBEL"
>> 
>> Happy New Year to all group members...
>> 
>> While visiting a relative "down south" for Christmas I found a
>> used VHF ground plane.
>> The vertical radiator is a closed monopole 41 cm from the base to
>> the highest position where it begins to bend down to the base again.
>> There are 4 horizontal radials 73 cm each from the tip to the center
>> of the base. The radiator is marked "decibel".
>> I hooked it up to my antenna analizer and got 171 Mc as the best
>> match, if my analizer tuned higher I assume the antenna would match
>> at 200 Mc or so...
>> 
>> I want to tune this antenna for 2m, in theory I know what to do, but
>> a ceramic dome installed between the base and where the upward
>> section of the radiator troubles me, is this a casing of a coil or
>> something similar ??? Before I start dimentioning the new aluminum
>> tubing, I would like to know all I can find out about this antenna.
>> 
>> Can anyone help ??
>> 
>> 73
>> Demetre - SV1ENS
>> 
>> 
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