......and most importantly Zero stinky Bears snorting around the rig. While I
try to sleep.
Over the moon.
73
John
KM4KMU
Sent from AOL Mobile Mail
On Thursday, August 9, 2018 John Young via VHFcontesting <nosigma@aol.com>
wrote:
Hooyah Cleared hot for Reddish Knob in the NRQZ. Four Thousand Four Hundred
Feet of FM Nirvana where the squelch is zero, the noise is zero, the take off
angle is zero, the blockage is zero for 360 degrees and the EM & EN grids are
line of sight. September is going to be KATG, Kick Azz Take Grids. More to
follow. 73 John KM4KMU Sent from AOL Mobile Mail From: Paulette Woody
<pwoody@nrao.edu> Date: Thursday, August 9, 2018 Subject: RE: Requested
Information from John Young KM4KMU for September VHF UHF Contest. - NRQZ ID
11549 To: nosigma <nosigma@aol.com> John, The following have been approved.
11549 Reddish Knob 52 11549 Reddish Knob 146 11549 Reddish Knob 223 11549
Reddish Knob 446 11549 Flagpole Knob 52 11549 Flagpole Knob 146 11549 Flagpole
Knob 223 11549 Flagpole Knob 446 Paulette From: Paulette Woody Sent:
Tuesday, July 31, 2018 11:33 AM To: 'nosigma@aol.com' <nosigma@aol.com>
Subject: RE: Requested Information from John Young KM4KMU for September VHF UHF
Contest. - NRQZ ID 11549 John, Thanks for the additional information. I
will be back in touch soon. Paulette From: nosigma@aol.com
<nosigma@aol.com> Sent: Sunday, July 29, 2018 8:52 AM To: Paulette Woody
<pwoody@nrao.edu> Subject: Requested Information from John Young KM4KMU for
September VHF UHF Contest. Paulette, I hope the attached power point slides
(beam widths and operating bearings) along with the frequency and band width
information below is what you were looking for. Let me know if I missed
something. Antenna Height & Beam Tilt Angle The booms of the Yagi
antenna's are 23 feet above ground level. The booms are angled upwards
approximately 3 degrees. I find that I get flatter take off angle by getting
as close to a sharp drop off as possible to avoid knife edge diffraction
(scatters energy downwards) from local terrain. A slight upward angle also
seems to help with propagation over near by ridge lines. The last picture in
the attachment shows the system set up on Reddish Knob from last year when
Sugar Grove didnt respond before the contest. Frequencies & Band Width
Amateur Radio FM band width is 16KHz. Frequency ranges (in MHz) to be used 6M:
52.525 center frequency. Covering 52.517 to 52.533 2M Primary: 146.520 center
frequency. Covering 146.512 to 146.528 2M Secondary: 146.535 center frequency.
Covering 146.527 to 146.543 1.25M: 223.500 center frequency. Covering 223.492
to 223.508 70cm: 446.000 center frequency. Covering 445.992 to 446.008 Beam
Patterns The attached power point shows the beam patterns for 3 of the 4
antenna's. Source of beam pattern plot is provided. M2 did not have a pattern
for the 440-18 70cm antenna and I could not find one modeled on the web. I
could spend a day modeling it up on ENZEC4 but its the same exact design as the
M2 222-10EZ and should have close to the same side and back lobe patterns as
teh 10-EZ just lower levels as is the main beam gain. Maps of Beam
Pointing During Contest Two maps are provided. The first is a detail showing
Reddish Knob. It has an overlay of the 30 and 60 degree beam widths centered
on Sugar Grove. The second map shows Reddish Knob, Flagpole Knob, Sugar Grove
and Green Bank Observatory along with the beam pattern overlays AND all
contacts made from either Reddish Knob or Flagpole Knob. Note that only 5 of
the 200+ contacts are inside the 60 degree beam width overlay centered on Sugar
Grove. The same 60 degree overlay centered on Green Bank has only 3 contacts
in it. I spend very little time with the antenna's pointed towards either
Green Bank or Sugar Grove. The 8 stations that lie inside a 60 degree cone
over both sites are all scheduled contacts. They are so hard to reach due to
terrain that we arrange a time in advance to make a contest exchange (Grid
Squares and Call Signs, not a rag chew). In other words I dont sit on those
bearings calling CQ. Its not productive when I could be working up and down
the Shenandoah Valley along I-81 where there is a much bigger population or up
into eastern PA, DC and Philly. If there is any additional information I can
provide I will be happy to do so. 73 John Young KM4KMU
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