DG7YBN - Low Noise Yagis
 

My Publications  
(x)
 

My Publications

  Last Update May 7th 2017



     

DG7YBN's Articles
About DG7YBN in Media
Known Bugs in Publications





TANT Manual
Pictured step-by-step official manual (with YU7EF and YT1NT, who programmed TANT) on how to derive a NEC model for TANT and run it.
For download as PDF at EA6VQ's www.DXMAPS.com and www.YU7EF.com
Issued 7/2009

Applied Conversion of Segmented Wires from NEC2 to 144 MHz Yagi Elements - Part 1
On Boom BC for Standard Insulators on 144 MHz in interaction with models segmentation density
Dubus 2/2010 & Dubus Technik X

Applied Conversion of Segmented Wires from NEC2 to 432 MHz Yagi Elements - Part 2
On Boom BC for Standard Insulators on 432 MHz in interaction with models segmentation density
Dubus 1/2011 & Dubus Technik X

Applied Conversion of Segmented Wires from NEC2 to 144/432 MHz Yagi Elements - Part 3
Background and additional info to part 1 & 2
Dubus 2/2011 & Dubus Technik XI

TANT Appendix
How to build a 4 Yagi array in NEC in compliance with the VE7BQH G/T Table (with VE7BQH) plus a detailed view on all parameters in the G/T Table
For download as PDF at EA6VQ's www.DXMAPS.com
Issued 9/2011

Applied Conversion of Segmented Wires from NEC to 144/432 MHz Yagi Elements
Part 4 - Simulating the Folded Dipole
Dubus 1/2012 & Dubus Technik XI

Notes on VHF/UHF Antenna G/T
Antenna G/T vs. System G/T, Proposal on corrected Sky and Earth Temperatures
Dubus 2/2012 & Dubus Technik XII

4nec2 goes TANT
How to derive Far field Tables for TANT with 4nec2
Dubus 3/2012 & Dubus Technik XII

5-8 ... an extendable 144 MHz Yagi
Explicite plan for building a convertible 5 to 8 element Yagi plus hints for stacking
Dubus 4/2012 & Dubus Technik XII

O pojmu G/T za VHF/UHF antene - Part 1
Article - Notes on VHF/UHF Antenna G/T - in Serbian, tnx Slobodan Bukvic, YU7XL,
on courtesy of Dubus-Magazine
Serbian SRS, Radio Amater 6/2012 - click to view as PDF on YU1SRS web

144/432 MHz Long Yagis with a bent Driven Element
GTV Yagi Series using a V-shape DE to transform to 50 ohms,
designed for best G/T ratio and high F/B
Dubus 1/2013 & Dubus Technik XII

O pojmu G/T za VHF/UHF antene - Part 2
Article - Notes on VHF/UHF Antenna G/T - in Serbian, tnx Slobodan Bukvic, YU7XL,
on courtesy of Dubus-Magazine
Serbian SRS, Radio Amater 1/2013 - click to view as PDF on YU1SRS web

Yagi Design: Aspects according Copyright and „Good Manners“
How to act inside the expected code of conduct when showing others Yagi designs on the internet and why Radio Amateurs should not copy designs or parts of them without seeking permission.
Dubus 1/2014

Stacking beyond DL6WU - Part 1
Basics like phase shift in the Yagi-Uda Antenna, pattern qualification for various stacking goals, background on DL6WU formula and analogy to Wave Optics. Pictured explainations on Effective Apertur Area in context to stacking and more
Dubus 4/2013 & Dubus Technik XIII

Stacking beyond DL6WU - Part 2
Diamond Stacking compared to DL6WU by normalised effective aperture areas (with Slobodan Bukvic, YU7XL), an introduction to phase shifted stacking schemes, Phased Arrays, Stagger Stacking in pairs and larger groups with explicite notes on how to feed such systems
Dubus 1/2014 & Dubus Technik XIII

Stacking beyond DL6WU - Part 3
Antenna G/T wise advantages of vertical 4 or 6 Yagi stacks on UHF against common H-frame arrangements for extraterrestrial communication
Dubus 3/2014

SM5BSZ’s BC.exe modified for frequency scaling and tested on 432 MHz
Details on the BC.exe in its freq. scaling version, portation to VBA and integration in the DG7YBN Yagi Elements Configuration Tool . Plots and details of test-Yagis with a 'semi DJ9BV' style element mounting through boom for 432 MHz with BC.exe numbers applied.
Dubus 4/2014

Construction of a 432 MHz GTV 70-19m Blade Yagi
A lightweight, yet effective Low Noise Yagi thanks to 4 mm elements mounted through boom with SM5BSZ's BC.exe applied. Building plan for a design with easy tuning and uncritical behaviour due to the broad sheet metal 'blade' dipole element .
Dubus 4/2014

2 m & 70 cm High Performance Power Splitters
Adjustable Power Splitters that provide a very good Return Loss without the need to work out a closest match between diameters of inner and outer tubes used or getting the core length 100 percent .
Dubus 2/2016

You can! Low Budget 70cm EME
'Hartmut DG7YBN and Thomas M0ABA report on their successes with low power EME operation on the 70cm band'. How to build and operate a QRPP 70 cm EME station based on a pair of GTV 70-7n Yagis .
Practical Wireless 9/2016

Influence of Plastic covering a UHF Yagi Element
How much do element holders, insulators and end caps work in the frequency response of a 70 cm Yagi-Uda? A set of measurments and their evaluation gives basic hints for better corrections on real builds .
Dubus 4/2016

Antenna G/T Calculators with Open Source Code, Part 1, F5FOD with DG7YBN
A lite version of a program computing Antenna Temperature and -G/T from the usual Far Field Tables generated by EZNEC and 4nec2 that does without pattern rotation for elevated antennas .
Dubus 1/2017

Calcul de G/T Logiciels de calcul Open Source, F5FOD with DG7YBN
Basics about Antenne-G/T and introduction of the concept of the AGTC antenna temperature and G/T program (in French) .
Radio REF 29145, Mar. 2017

Antenna G/T Calculators with Open Source Code, Part 2, F5FOD with DG7YBN
A program computing Antenna Temperature and -G/T from the usual Far Field Tables generated by EZNEC and 4nec2 with mathematical pattern rotation for elevated antennas .
Dubus 2/2017

70 cm EME-QSOs with low Power and small Antennas
Basics, equipment, hints and the history on the record breaking EME-QRPP QSOs at MX0CNS/M0ABA (in German) .
Funkamateur 6/2017



∗ ∗ ∗   Dubus is a bilingual (English/German) written magazine
for Ham-Radio on VHF/UHF and Microwaves   ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗







About DG7YBN in Media & by other Authors


Rothammels Antennenbuch
by Alois Krischke, DJ0TR, issue No. 13, 2013, pg. 221
DG7YBN-Speisung : Showing my Quarter Wave Line DE feed solution ("Viertelwellensperre")

Japanese "CQ ham radio" magazine
by Michiaki Watanabe, JH1KRC, issue 2014, May No.5, pg. 190ff
EME - Earth-Moon-Earth column: Showing some designs as the GTV 2-12 mk2 and motivating importance of Low Noise Yagis
Link to Japanese CQ ham radio magazine


British Practical Wireless
by Tim Kirby, G4VXE, "World of VHF" column.
Reporting about the Moonbounce record MX0CNS to HB9Q and DL7APV with a GTV 70-2 and 60 W. Issue Febr. 2017, pg. 55








Known Bugs in Publications

Dubus 1/2011, Applied Conversion of Segmented Wires from NEC to 432 MHz Yagi Elements
What? Geometry of the 5 elem. Test Yagi, 20 x 20 mm boom, D1 = 323.8
Right: 20 x 20 mm boom, D1 = 319.0


Dubus 1/2012, Applied Conversion of Segmented Wires from NEC to 144/432 MHz Yagi Elements - Part 4 - Simulating the Folded Dipole
What? Fig. 9: 11 wires
Right: 11 segments on the wire, not 11 wires
What? Last passage, pg. 32 - typo in call "DB7WY"
Right: Dear Wolfgang's call is DB6WY


Dubus 2/2012, Notes on VHF/UHF Antenna G/T and TANT Appendix
What? Chart of Y-Factor for isotropic radiator, y-scales notation is "Temp [K]"
Right: as it is a ratio of Kelvin / Kelvin it is [ / ], no unit, simply the Y-Factor


Serbian SRS, Radio Amater 6/2012, O pojmu G/T za VHF/UHF antene
What? Kelvin as K° ... , translators bug
Right: just K, Kelvin as is a unit on its own

Dubus Technik XII, 144/432 MHz Long Yagis with a bent Driven Element, pg. 112 (fixed in magazine)
What? On 432 MHz the antenna temperature is approximately three times higher than on 144 Mhz ... , mothertounge correctors bug
Right: Because of the much larger Y-Factor on 432 MHz the antenna temperature has a much greater impact on the Signal/Noise Ratio at the antenna terminals than on 144 MHz.









73, Hartmut, DG7YBN


Flag Counter