HAMLOG.online - Global log and hamradio awards

 

HAMLOG service has been operating since 2015. The prototype was the autocount system for the RAEM-110 memorial, which made it possible to download the connections of special stations, as well as issue diplomas in electronic form.

More info: https://y7k5t6wdh4kiq7k4gcdygd2zmy--hamlog-online.translate.goog/

SX300ML (Molon Lave) Special Event Station

  SX300ML (Molon Lave) Special Event Station 5/9/2020 - 19/9/2020

SX300ML is a special callsign commemorating the 2500th anniversary of the epic  Battle of Thermopylae (480 BC), when  King Leonidas of Sparta and a small force of Greek warriors, including 300 Spartans, resisted  the much larger invading  Persian army led by Xerxes the Great.

INFO & LOG:https://www.qrz.com/db/SX300ML

Russian Radio Amateur

 

Everything about amateur radio in Russia, Callbook, Awards, contest etc..

https://www.qrz.ru/

Amateur Atlas

Amateur Atlas

Christian F5LGF produced an exceptional document of more than 300 pages which details, for each DXCC country, the geographical distribution of prefixes, regions etc ... with many illustrations.
Christian died in December 2019.

Reading Here: http://www.lesnouvellesdx.fr/atlas.php

Installation Antennas to rotator (Tower-Mounted Antennas)

In the preferred tower-mounting configuration, the antenna Wind Loading Area must be less than 1 m2 (G-450A) or 2 m2 (G-650A), and the “K” factor (see below) must not exceed 100 (G-450A) or 180 (G-650A), where K = [Antenna Turning Radius (m)] x [Antenna + Mast Weight (kg)]. Refer to the antenna manufacturer’s specification sheet for determining the turning radius and weight of the antenna

  

Example: In this example, a 14 MHz 3-element Yagi of Turning Radius 7.5 m, Weight of 14 kg, and Surface area of 0.7 m2 is proposed for tower mounting below a 3-element 21/28 MHz trapped Yagi of Turning Radius 3.5 m, Weight of 13 kg, and Surface Area of 0.3 m2 . The mast weight is 5 kg.

 The antenna system K factor, then, is the sum of the two antenna K factors:

 K1 = K factor of 14 MHz 3-element Yagi.

K1 = Turning Radius (7.5 m) X Weight (14 kg + 2.5 kg) = 123.75

         |              |

Antenna Weight      Mast Weight (5 kg ÷ 2)

  K2 = K factor of 21/28 MHz 3-element trapped Yagi.

K2 = Turning Radius (3.5 m) X Weight (13 kg + 2.5 kg) = 54.25

         |              |

Antenna Weight      Mast Weight (5 kg ÷ 2)

 KTotal = K1 + K2 = 123.75 + 54.25 = 178

 The antenna system Wind Loading Area is: 0.7 m2 + 0.3 m2 = 1.0 m2|

 Note: In such “Christmas Tree” installations, compute the mast weight separately for each antenna, using the relative heights of the two antennas to apportion the mast weight.
Refer to the antenna manufacturer’s specification sheet for determining the weight and the surface area of the proposed antenna.

More: https://www.yaesu.com/indexVS.cfm?cmd=DisplayProducts&ProdCatID=104&encProdID=9CD2145C24AE53C5A6C62D7D703A9F3C&DivisionID=65&isArchived=0

Installation Antennas to rotator (Pole-Mounted Antennas)

Pole-Mounted Antennas

Mounting of the rotator on a pole or mast results in a significant de-rating of the size of the antenna which can be mounted, due to the tremendous bending forces applied to the rotator’s clamps. For pole mounting, the attached antenna must have a net mounted weight (combined weight of antenna plus mast) of 10 kg or less, and the product of multiplying the [Antenna Wind Load Area (in m2 )] by the [Height of the Antenna Mast (in m)] must be 0.25 or less.

[Antenna Weight] + [Mast Weight] ≤ 10 kg.

[Antenna Wind Load Area] X [Height of Antenna Mast] ≤ 0.25

Refer to the antenna manufacturer’s specification sheet for determining the weight and the surface area of the proposed antenna.
Yeasu Rotators:
The antenna Wind Loading Area must be less than ,=<0,25 (G-450A) & (G-650A), or =<0,45 (G-1000DXC), or =<0,80 (G-28000DXC)

Example:

For a 50 MHz 5-element antenna of surface area of 0.3 m2 , the above specifications for pole mounting will be met if (A) the antenna is mounted on a mast not longer than 0.8 m (0.3 X 0.8 = 0.24 < 0.25), and (B) if the mast weight plus the antenna weight is less than 10 kg. However, if the mast is 1 meter long, the specification will be exceeded (0.3 X 1 = 0.3 > 0.25).

More: https://www.yaesu.com/indexVS.cfm?cmd=DisplayProducts&ProdCatID=104&encProdID=9CD2145C24AE53C5A6C62D7D703A9F3C&DivisionID=65&isArchived=0

Coaxial Cable Data

Type	50MHz loss/max pwr	144MHz loss/max pwr	432MHz loss/max pwr	1296MHz loss/max pwr	diameter	velocity factor
Aircom+		4.5 / 1000	8.2 / 530	14.5 / 300	10.8	0.85
Aircell 7	4.8 / 1000	7.9 / 800	14.1 / -	26.1 / 190	7.3	0.83
Ecoflex 10	- / -	4.8 / 950	8.9 / -	16.5 / -	10.2	0.86
Ecoflex 15	1.96 / -	3.4 / 1800	6.1 / -	11.4 / -	14.6	0.86
H 100	2.8 / -	4.9 / 1000	8.8 / 530	16.0 / 130	9.8	0.84
H 155	6.5 / -	11.2 / 240	19.8 / 90	34.9 / 49	5.4	0.79
H 500	2.9 / -	- / 1000	- / 530	17.4 / 130	9.8	0.81
H 2000 flex	2.7 / -	4.8 / 1600	8.5 / -	15.7 / -	10.3	0.83
RG 55		18.5 / 300	34.0 / 200	60.0 / 100	5.4	0.66
RG 58 CU	11.0 / -	20.0 / 240	40.0 / 90	90.0 / 49	5.0	0.66
RG 174 U		34.0 / 95	60.0 / -	110.0 / 30	2.8	0.66
RG 213 U	4.3 / -	8.2 / 800	15.0 / 290	26.0 / -	10.3	0.66
RG 223 U		18.5 / 300	34.0 / 200	60.0 / 100	5.4	0.66
Cellflex 1/4"		5.5 / 1200	9.0 / 750	18.0 / 400	8.0	0.85
Cellflex 3/8"		3.8 / 2800	6.5 / 1200	13.0 / 680	15.0	0.85
Cellflex 1/2"		3.0 / 2800	5.6 / 1600	10.0 / 850	16.0	0.88
Cellflex 5/8"		2.5 / 4000	4.0 / 2300	7.2 / 1350	23.0	0.85

loss : dB per 100meters   -   max pwr : Watts   -   diameter : millimeters