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3W6C bandplan: operating frequencies

This list of operating frequencies is, of course, provided only as a reference. Our goal is to operate as listed in the table below, but doing so will depend on antenna logistics and propagation conditions. We will make our very best efforts to operate according to this bandplan.

  List of typical operating frequencies (kHz)  [updated: April 11, 2010]

Please let us know which bands and modes you need. We will try to give you more than one band and mode. Send your comments to the 3W6C Communications Team.

See you during the DXpedition!

  • Change of frequency 20m SSB: new Tx 14205, Rx 14215-14225 from 11 april.
  • Read about 6 m and Sat at the end of this page.


Our bandplan is based upon the following considerations:


•  CW only on 160m

Transmit on 1831 and listen down 1820-1825 kHz

Our primary goal is to make contacts with USA and EU stations; Asia will not be very difficult.

For approximately the last two years there has been a navigational system operating in the Baltic Sea area (Russia / Estonia) that covers a frequency spectrum of approx. 1804-1825 kHz.

Note: The Japanese band is from 1810-1825 kHz, and the European band from 1810 kHz up. USA is from 1800 up.


•  80m CW

Transmit 3502 and listen up 3510-3515 kHz (outside the international DX window)

For USA: also listen up 3525-3530 when the band is open.
(US General Class licensees can transmit CW from 3525 kHz and Extra Class licensees from 3500 kHz)

•  80m SSB

Our license permits TX from 3795-3810 only

For Japan: Transmit 3810 kHz and listen down from 3795-3805 kHz

In the beginning of the evening we can use this frequency band, and it also allows some other areas such as Asia/Pacific to call in between 3795-3800, including the USA from 3800-3805 and Extra Class US stations from 3795-3805.

When the band is open to Europe, we have a small Japanese section included from 3765-3770 so we don’t have to listen up between 3795-3805.

For the USA: Transmit 3795 kHz and listen up 3800-3810 kHz (only about 2 hours in the early evening, the rest of the time we use 3810 kHz)
(US General Class licensees can transmit SSB from 3800 kHz)

This band also allows for JA and some other Asia/Pacific stations to call in from 3800-3805

For Europe: Transmit 3810 kHz and listen down 3765-3780 kHz (outside the DX window)

This band can also be used for other areas such as the Pacific, the rest of Asia, etc.

This band has been extended to 3765 because the Japanese can use 3765-3770 kHz.


•  40m CW

For Europe: Transmit 7002 and listen up 7005-7010 kHz

For USA: Transmit 7002 kHz and listen up 7025-7030 kHz
(US General Class licensees can transmit CW from 7025 kHz, Extra Class licensees from 7000 kHz)

•  40m SSB

Transmit 7070 kHz: listen 7080-7090 kHz; for USA listen 7180-7190 (depending on whether or not there is broadcast station interference we may have to change this)
(US General Class licensees can transmit SSB from 7175 kHz)

•  40m RTTY

Transmit 7035, listen 7037-7042 (digimode is from 7035-7045)


•  30m CW

Transmit 10115 kHz, listen 10120-10125

•  30m RTTY

Transmit 10118 kHz, listen 10140-10150


•  20m CW

Transmit 14002 kHz, listen up 14005-14010 and for the USA listen up 14025-14030
(US General Class licensees can transmit CW from 14025 kHz, Extra Class licensees from 14000 kHz)

•  20m SSB

Transmit 14205, listen up 14215-14225
(changed from 14220 resp. 14230-14240 due to SSTV bandplan and -QRM)

•  20m RTTY

14080 kHz, listen up 14085-14090 kHz
(digiband for RTTY: 14080-14099)


•  17m CW

Transmit 18072 kHz, listen up 18075-18080

•  17m SSB

Transmit 18140, listen up 18150-18160

•  17m RTTY

18100 kHz, listen up 18105-18109 kHz
(digiband: 18100-18109) – 18110 is the international beacon frequency


•  15m CW

Transmit 21002 kHz, listen up 21005-21010 and for the USA 21025-21030
(US General Class licensees can transmit CW from 21025 kHz and Extra Class licensees from 21000 kHz)

•  15m SSB

Transmit 21220, listen up 21230-21240
(US General Class licensees can transmit SSB from 21225 kHz)

•  15m RTTY

21080 kHz, listen up 21085-21090 kHz
(digiband for RTTY: 21080-21100)


•  12m CW

Transmit 24902 kHz, listen up 24905-24910

•  12m SSB

Transmit 24940, listen up 24950-24960

•  12m RTTY

24920 kHz, listen up 24925-24929 kHz
(digiband: 24920-24929) – 24930 is the beacon frequency


•  10m CW

Transmit 28002 kHz, listen up 28005-28010
(US General Class licensees can transmit CW from 28000 kHz, but probably very poor conditions to the USA)

•  10m SSB

Transmit 28420, listen up 28430-28440
(US General Class licensees can transmit SSB from 28300 kHz)

•  10m RTTY

28080 kHz, listen up 28085-28090 kHz
(digiband for RTTY: 28080-28120)


•  6m CW

Transmit 50102 kHz, listen up 50105-50109 kHz

•  6m SSB

Transmit 50120 kHz, listen up 50125-50135 kHz

•  6m beacon: 50038 kHz

At this time we are not planning any specific radio operation on the 50-MHz band. Instead, we will set up a beacon on 50.038 MHz. Transmission sequence: VVV 3W6C 3W6C 3W6C Beacon Loc OK37QD . . . This frequency is used only by the 50038 kHz beacon LU5EGY in Buenos Aires, which will result in virtually no interference.

If and when our beacon is heard in any part of the world, we ask that you inform us of this fact on the active HF bands. In addition, our pilots will be glad to accept this information. As soon as we have received such feedback, those DXpedition team members who are not busy at the moment can operate the 6m station. Should there be regular 6m band openings, we will start to plan 6m operation into our daily schedule.

I look forward to possible 6m contacts, de HB9BXE

Satellite operation

[UPDATE April 14]
Due to the new operating conditions, HB9BXE had to cancel the previous sat listing in this section, but he will try to work a few satellite passes at short notice. Please check Twitter for latest sat news! Please observe the following satellite pass(es):

  • April 15, AO-51, 10.21 UTC, 14 minutes
  • April 16, AO-51, 22.02 UTC, 15 minutes

In order to make it possible for the maximum number of stations to have a contact with 3W6C, I will not give out the locator OK37QD.

I request that the satellite community call me via AOS using 3W6C so that I can set up the antenna correctly from the start.

If time permits, I will active additional satellite flyovers.

At this time, on behalf of all our operators, I would like to extend a special thanks to our support team as well as our pilot team for the fantastic support. I also thank the pilot team in advance for the valuable information they will provide to help us optimize our operating.

I look forward to hearing all of you from Vietnam on the QRG, de HB9BXE


Eddy, XV1X / Hans-Peter, HB9BXE

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3W6C in a nutshell

Detailed itinerary

«3W6C gives Twitter a try.» We can neither feed it nor read it directly on the island, but we keep you up to date with a selection of info. See Twitter for the short message service.
•  Our Twitter channel is closed now.

3W6C Team

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According to the "World Lighthouse On The Air" Program, there is a lighthouse on Côn Có Island that is valid for WLOTA awards. We have been informed that QSOs with 3W6C will be valid for WLOTA #2557 after receipt of validation. Read more on the WLOTA program on their web site.

3W6C Côn Có counts for IOTA  AS-185 . . .

IOTA – The Islands on the Air Program


The IOTA program is an alternative to the DXCC challenge. Who among you has not yet dreamt at least once of a small island with palm lined beaches? The RSGB's IOTA program lets you collect them just from your shack! More . . .

3W6C – Côn Có island

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Thank you very much!
Vielen herzlichen Dank!
Vy 73 de 3W6C

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