1151 - Dru VFH

Timeframes are in UTC
Owner Andrew Ackerman
QTH Locator DM79mm
Coordinates(lat, lon) 39.542°, -104.985°
Altitude 1767 m
Min Horizon 14°
Target Utilization 100 %
Antennas Quadrafilar (VHF)
Success Rate
86% Complete (success)
14% Complete (danger)
Observations 1940
Creation Date 4 years, 4 months ago
Client version 1.0
Offline Last seen 3 years, 11 months ago
Uptime 4 years, 1 month
Dru VFH

3 Dec 19 changed from HF Dipole to homemade quadrifilar helix antenna. Wood, 12 gauge copper wire with insulation on and hot glue. Many tries, even having a NanoVNA; tuned for 146 Mhz; symmetrical lengths; 0.41 w/h ratio; quarter wave RHCP insert. Antenna, RTL-SDR, Pi4. Improved with obs 1315448 after adding 3 loops in ferrite core choke and turning left 90 deg; slightly lowered freq. Now better at times than my other ground plane. On table next to house under large cottonwood (no leaves).
Future Passes
Name ⤉ ⇴ ⤈ Polar plot
Calculating Future Passes
passes found. Open all for scheduling.
Status Datetime Time since Change
Online 2020-04-23 07:07:07 3 years, 11 months ago
Online 2020-04-11 18:08:07 3 years, 11 months ago
Online 2020-04-11 04:23:59 3 years, 11 months ago
Online 2020-04-06 12:24:43 3 years, 11 months ago
Online 2020-04-04 02:04:06 3 years, 12 months ago
Online 2020-03-23 19:49:37 4 years ago
Online 2020-03-10 16:16:37 4 years ago
Online 2020-02-04 01:46:37 4 years, 1 month ago
Offline 2020-02-04 01:46:11 4 years, 1 month ago
Online 2020-01-13 03:40:37 4 years, 2 months ago
Online 2019-12-19 09:52:23 4 years, 3 months ago
Online 2019-12-05 02:25:37 4 years, 3 months ago
Offline 2019-12-05 02:20:03 4 years, 3 months ago
Online 2019-12-04 04:00:00 4 years, 3 months ago
Online 2019-12-03 10:20:12 4 years, 3 months ago
Online 2019-12-03 07:03:04 4 years, 3 months ago
Testing 2019-12-03 06:20:56 4 years, 3 months ago
Testing 2019-11-29 03:43:52 4 years, 4 months ago
Online 2019-11-25 18:53:32 4 years, 4 months ago
Testing 2019-11-25 16:35:08 4 years, 4 months ago
Testing 2019-11-25 04:26:13 4 years, 4 months ago
Online 2019-11-25 01:10:37 4 years, 4 months ago
Testing 2019-11-25 00:20:12 4 years, 4 months ago
Testing 2019-11-24 23:18:43 4 years, 4 months ago
Online 2019-11-24 17:07:04 4 years, 4 months ago
Testing 2019-11-24 16:31:46 4 years, 4 months ago
Online 2019-11-16 19:20:55 4 years, 4 months ago
Testing 2019-11-16 17:28:55 4 years, 4 months ago
Testing 2019-11-15 18:59:05 4 years, 4 months ago
Offline 2019-11-15 18:46:20 4 years, 4 months ago