ARRL

xof7fox

Joined: Sat, Jul 7th 2012, 16:27 Roles: N/A Moderates: N/A

Latest Topics

Topic Created Posts Views Last Activity
'Random Wire Receiving Antennas' - Gen'l Question... Aug 14th, 17:08 3 93 2 weeks, 5 days ago
Q on dBi, dBd & dB(nothing) vendor data? Nov 20th 2014, 20:31 2 871 on 21/11/14
Drone aka UAV to put up stationary antenna? Aug 12th 2014, 21:57 2 617 on 5/9/14
If I am Tx'ing a VHF GrndWave of how much value is a Beam Antenna? Jan 6th 2014, 16:54 4 703 on 14/1/14
Impedance per current General Manual p.6-6/fig.6-5 ? Nov 13th 2013, 16:48 1 637 on 13/11/13
Why is 72 Ohm Impedance center feed point desireable? Oct 2nd 2013, 21:10 3 902 on 3/10/13
Impedance Matching HF Aug 1st 2013, 22:18 3 1,218 on 3/8/13
Folded Dipole 40M Aug 1st 2013, 22:04 3 1,062 on 17/9/13

Latest Posts

Topic Author Posted On
'Random Wire Receiving Antennas' - Gen'l Question... xof7fox 2 weeks, 5 days ago
Thank you Zack. - Fred.
'Random Wire Receiving Antennas' - Gen'l Question... xof7fox 3 weeks, 1 day ago
Is it correct to 'generally' expect that for purely receiving voice (this question is not about transmitting) via a random wire for HF (AM or SSB) &/or VHF (FM) &/or UHF (FM) that I will receive more and clearer if I ALWAYS connect the antenna wire to a ground rod? Thx. - Fred.
Q on dBi, dBd & dB(nothing) vendor data? xof7fox on 20/11/14
When vendors (or even authors of some technical papers) report Antenna Gain with no relative reference to "i"-isotropic (dBi) or "d"-dipole (dBd), and therefore report the gain as simply a certain amount of dB, e.g., 3dB, should one assume that it means the same as dBi? I know that Antenna Gain is always a number that is relative to "something," and yet, as I have said, I see Antenna Gain from time to time reported with no reference to "i" or "d." Many thanks - Fred K4XXK.
Drone aka UAV to put up stationary antenna? xof7fox on 12/8/14
I have done a little time on the internet and found no experimentation, let alone commercial applications, of using drones (aka, Unmanned Aerial Vehicles aka UAVs) to position an antenna and 'sort of' hold it 'in place.' While realizing that this could take more drone heft to lift and hold any antenna that is technologically practical/feasible, I am still brazen enough to risk the embarrassment of posting herein / asking the question. Thanks (I am thinking I just might be hearing laughter in the background? :- ).
If I am Tx'ing a VHF GrndWave of how much value is a Beam Antenna? xof7fox on 14/1/14
Thank you Zack.
Thank you Martin.
- Fred K4XXK.

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