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February 2016

82

Propagation

NOTICES TO READERS.

© Radio

Society of Great Britain, 2016. All rights

reserved. No part of this publication

may be reproduced, stored in a retrieval

system, or transmitted in any form or

by any means, electronic, mechanical,

photocopying, recording or otherwise,

without the prior written permission of

the Radio Society of Great Britain.

ERRORS AND OMISSIONS.

Whilst

the Radio Society of Great Britain (the

publisher) takes all reasonable care

in the production of

RadCom

, we can

accept no responsibility for errors,

inaccuracies or omissions contained

within the magazine or any subsequent

loss arising from any use thereof.

Reliance placed on the contents of

RadCom

is at the reader’s own risk. We

urge any reader to take all precautions

appropriate to avoid any loss or damage

to equipment and ensure the personal

safety of themselves and others when

using material contained in

RadCom

.

It should be also noted that patent or

copyright protection may exist in relation

to any items within this magazine. The

RSGB does not accept any responsibility

for failing to identify any such patents,

copyright or any other protection. Readers

are also reminded that the use of radio

transmission and reception equipment

(including scanning) is subject to

licensing and the erection of external

aerials may be subject to local authority

planning regulations.

ADVERTISEMENTS.

Although RSGB

staff and the staff of Danby Advertising

(its Advertising Agent) take reasonable

precautions to protect the interests of

readers by ensuring as far as practicable

that advertisements in the pages of

RadCom

are bona fide, the magazine

and its publisher, the RSGB, cannot

accept any undertaking in respect of

claims made by advertisers, whether

these advertisements are printed as part

of the magazine, or are in the form of

inserts. Under no circumstances will the

magazine accept liability for non-receipt

of goods ordered, late delivery, or faults

in manufacture. Legal remedies are

available in respect of some of these

circumstances, and readers who have

complaints should address them to

the advertiser or should consult a local

Trading Standards Office, or a Citizens’

Advice Bureau, or their own solicitors.

The publishers make no representation,

express or implied, that equipment

advertised conforms with any legal

requirements of the Electro

Magnetic Compatibility

Regulations 1992. Readers

should note that prices

advertised may not be

accurate due to currency

exchange rate fluctuations,

or tax changes.

R S G B

Key:

The figures represent approximate S-meter readings, whilst the colours represent expected circuit reliability.

Black

equals low to very low probability,

Blue

equals good

probability and

Red

equals a strong probability. No signal is expected when a ‘.’ is shown. The RSGB Propagation Studies Committee provides propagation predictions on the internet at

www.rsgb.org.uk/propagation/index.php

. An input power of 100W and a dipole aerial has been used in the preparation of these predictions; therefore a better equipped station should

expect better results. The predicted smoothed sunspot numbers for February, March & April are respectively (SIDC classical method – Waldmeier’s standard) 54, 51 & 48 and (combined

method) 66, 66 & 65. The provisional mean sunspot number for December was 53.3. The daily maximum / minimum numbers were 86 on 14 December and 18 on 21 December.

HF F-Layer Propagation Predictions for February 2016

Compiled by Gwyn Williams, G4FKH

3.5MHz

7.0MHz

10.1MHz

14.0MHz

18.1MHz

21.0MHz

24.9MHz

28.0MHz

Time

000011111220 000011111220 000011111220 000011111220 000011111220 000011111220 000011111220 000011111220

(UTC)

246802468020 246802468020 246802468020 246802468020 246802468020 246802468020 246802468020 246802468020

*** Europe

Moscow

67

.......

677 6

.

6

.....

6666

..

6

....

66

... ..3

66666

31.. ..1

6

6

666

1... ...

66664

1... ...3

564

2.... ...2

34

31....

*** Asia

Yakutsk

2......13443 3.2...134

4

44 ...22..13... ...33....... ............ ............ ............ ............

Tokyo

.........3.. ......24433. ....2.23.21. ....2..1.... ....1....... ............ ............ ............

Singapore

........3.32 .......55433 ......3

5

42.2 ......4

4

2... .....233.... ....1222.... .....11..... ............

Hyderabad

........3.33 41.....35444 1.....2452.. ......3

4

2... ....224

4

.... ...22332.... ...1233..... ....111.....

Tel Aviv

66

........

66 666

.....

6666

..

6

.....

6

.

6

. ..

655455

4.2. ..2

55555

.... ...

5555

3.... ...3322..... ...1211.....

*** Oceania

Wellington .......2.... ....334

5

.... ...44

5

5

5

4... ...3

55

5

4

2... ...2

44

.2.... ....332..... ....12...... ............

Well (ZL) (LP) ............ ............ ..1......... 11.......... ...2.....1.. ...1.....1.. ............ ............

Perth

.........2.. .......454.. ......3

5

.3.1 ......3

4

.... .....133.... .....122.... .....11..... ............

Sydney

.........2.. ......4543.. ......5

5

.1.. .....34

4

.... ....2333.... ....1221.... ....1.1..... ............

Melbourne (LP) ............ ...3........ ...33....... ...23....... ....3....... ....2....... ............ ............

Honolulu

..13........ ..142..1.... ...32111.... ........1... ............ ............ ............ ............

Honolulu (LP) ............ ............ ............ ............ ........1... ........1... ........1... ............

W. Samoa

............ ...43123.... ...343432... ....3

44

12... ....233..... .....22..... .....1...... ............

*** Africa

Mauritius

.........3.. 4......14544 2......34322 .......431.. ......131... ...11112.... ....1111.... ............

Johanesburg 33........33 54.......455 33......4444 .......24321 ...1..1331.. ...111232... ...11122.... ....1111....

Ibadan

555......555

656

3....3

666 5555

2..24

655

2.1

5

33235

5

21 ...

54

444

5

2.. ...

554

4

5

4... ...3

5555

1... ...13322....

Nairobi

44......244. 553.....4555 414.....5544 ..12...352.. ...3223

4

2... ...

3

133

4

.... ...1..11.... ............

Canary Isles

666

.......

66 7776

.....

777 66

.

7

.....

766

332

7

65

5

5664

3 11.

6

6

66665

21 ...

5

6

6666

31. ...3

66664

2.. ...2

5655

31..

*** S. America

Buenos Aires 3333........

44

3

5

......34 331

5

......33 ...4.....11. ...21....1.. ....11..1... .....1.1.... ............

Rio de Janeiro 333........3

55

44......4

5

442

4

.....344 11.3.....321 ...121.122.. ....211121.. ....21111... ....11.1....

Lima

3323........ 442

5

.......3 22.4.......2 ...2........ .....1...... .....11..... .....1...... ............

Caracas

4433.......3

4

42

4

2.....34 21.43.....32 ....22...2.. .....3222... .....3322... .....332.... .....11.....

*** N. America

Guatemala

3333........ 432

5

2......3 21.42.....12 ...1.1...... ......111... ......211... ......11.... ............

New Orleans 3333.......2 44.42.....13 ...4.1...... ......211... ......322... ......32.... ......11.... ............

Washington 44442.....24

5

51532...235 1..113212342 .....33233.. .....2

4

431.. ......

444

... ......

44

1... ......22....

Quebec

.5542.....34 45.431..1245 ....1222232. .....33332.. .....1

444

... ......

44

2... ......22.... ......11....

Anchorage

.2.......... ........111. ........21.. ............ ............ ............ ............ ............

Vancouver

.3.......... .1.3.......2 ........11.. ........2... ........1... ............ ............ ............

San Francisco .3.3........ .2142......2 ...21....... .......1.... .......11... ............ ............ ............

San Fran (LP) ............ ............ ............ .......2.... .......2.... .......2.... .......1.... ............

Rad

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