[TowerTalk] SP7GXP antennas?

[David Gilbert]

If that's the case, they were clumsy on their website because it clearly 
states dBd.

Dave   AB7E



On 10/21/2021 11:30 AM, Randy Farmer wrote:
> Sounds like they're specifying gain relative to isotropic, hence an 
> extra 2.1 dB.
>
> 73...
> Randy, W8FN
>
> On 10/21/2021 10:38 AM, john at kk9a.com wrote:
>> I have modeled some OptiBeam antennas and the published specs seem 
>> accurate.
>> Of course getting 2db more gain from the same boom length would 
>> circumvent
>> the laws of physics. I recently installed a 4el 40m OptiBeam on my 
>> tower,
>> the SP6GXP version is 37% lighter.
>>
>> John KK9A
>>
>>
>> David Gilbert AB7E wrote:
>>
>> His 16 element 20/15/10 tribander looks like an almost complete copy of
>> my Optibeam OB16-3, except that SP6GXP claims about 2 db more gain on
>> each band and uses lighter weight materials.
>>
>> Dave   AB7E
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