As part of the learning process of getting CW going, was the question of “HOW?” to hold a qso, the below information was posted on the sota group, the below is aimed at sota, and how to have a quick sota cw contact, but is also generic for those learning morse. It was created by Ron VK3AFW thats for the useful article. If you have anything to add, please leave a comment.
- Send at the speed you can receive at.
- If you send at 25 wpm the other guy is likely to send to you at 25 wpm. Send at 10 wpm and he will send at 10 wpm.
- Starting a transmission
- The accepted practice if you want to send a start signal is to send CT, that is -*-*-
- For a basic bare bones SOTA QSO it isn’t necessary because you won’t start until the other station has gone into receiving mode.
- Ending a transmission.
- The minimum you must send is a “K’ that is -*-
- More experienced CW ops will often send “BK” which can be thought of a “Back to you” The handbooks recommend sending AR K, *-*-* -*-
Essential Extra Morse characters
- The underlining signifies no letter spacing between characters. * is a dit and – is a dah.
- / The oblique slash: DN -**-*- Or = A dash or double dash: BT -***- frequently used instead of the oblique slash and often used as the CW equivalent of “um” or “er” a pause and space filler while thinking what to say next
- ? Question mark: UD **–**
- Error: EEEEEEE ******* Doesn’t really matter if you send only 6 dots or more than 7 dots as the other op will understand
- A useful extra character. – . Full stop AAA *-*-*-
- Note that often a question mark **–** is also used instead of a QRZ (Who is calling or who is there?)
Some useful Hints from CW activators
Sending things twice or even three times is important as it allows the activator or chaser to be confident they got it right. From past experience asking a nervous CW station to send their call or report again usually ends in silence. Possibly they did not understand the request. On a similar note if a station sends an R of less than 5 then definitely send the report and call sign more than once. QSB and interference happens at the most inconvenient times.
Write a “cheat sheet”, which has the SOTA summit reference, summit name, and any other relevant info such as National park name, WWFF reference etc, to avoid the mental blank or help answer a non SOTA station who calls expecting a chat.
If people want to make CW contacts during an activation and if time and timing permits why not do CW before UTC midnight and voice after. That way the CW chasers are rewarded for their efforts.
- Example SOTA CW QSO Template *fake callings and summit!!
- NOTE: each operator will have a slightly different approach but this is a good way to start.
- Activator calls
- CQ SOTA CQ SOTA DE VK3XAS/P VK3XAS/P on VK3/VC 123 VK3/VC 123 BK
- Or optionally
- CQ SOTA CQ SOTA DE VK3XAS/P VK3XAS/P K
- The summit will have been announced on SOTAwatch but it is useful for the activator to send it at least occasionally when calling CQ. Although strictly speaking the summit should be sent as VK3 DN VC BT 123 it will usually be sent as VK3 BT VC 123. As long as the letters and numbers are sent and received that’s what matters. The punctuation is nice but it’s not a hanging offence to just use spaces and omit it when starting out.
- Chaser calls activator
- VK3XAS/P de VK3BQ VK3BQ VK3BQ K
- Activator replies with a report for the chaser
- VK3BQ ur rst 579 579 579 DE VK3XAS/P K
- Note in this example the report is sent three times as the signal is not really really strong and the chaser will have more local noise and get a weaker signal from the activator.
- Chaser confirms receipt of his report and gives one to activator
- R R UR RST 559 559 de VK3BQ K
- Activator acknowledges report and signs off
- RR TU 73 de VK3XAS/P EE
- This is preferred for simplicity although sometimes you may hear RR TU 73 de VK3XAS/P AR K
- RR TU 73 de VK3XAS/P SK
- Chaser may then send 73
- TU 73 de VK3BQ K or simply
- The E E is preferable for brevity .
- TU 73 EE or just TU are alternatives you may hear.
- If the chaser sends TU 73 etc the activator may send a final final, pause and then call briefly in anticipation of a pile up
- CQ SOTA de VK3XAS/P K
- The shorter versions will be applicable as UTC roll-over approaches or if there is a pile-up.
Some Common CW Abbreviations – a subset for SOTA
- CQ – General Call
- DE – This is
- R – Roger, Romeo, OK, received. Usually sent as R R
- U – You
- UR – Your ALSO You are
- RST – Readability, signal strength, tone
- TU, TNX – Thank you, thanks.
- K – Invitation to transmit
- BK – Break or in this context back to you
- 73 – Good Bye, best regards.
- EE – Sent at the end of a contact as a shorthand final final acknowledgement.
- N – A substitute for 9 (Nine)
￼￼Abbreviations you will hear and should become familiar with:
- QRS – Send slower
- FB – Fine Business – often used as a bit of padding whilst preparing something further to send.
- AGN – meaning call me again or repeat the last transmission information
- AGN RST PSE or AGN CALL PSE PSE please
- QSL – copied
- QSL? – Did you copy?
- SRI – sorry, such as SRI NIL COPY HERE
- Abbreviations more common with an actual QSO and not a “contest” exchange.
- QRX – used during a two (or more) station pile up. Means that the will be called
- ￼￼AR – end of message GA good afternoon GM good morning ES And shortly. Not really a problem with VK SOTA CW at this time
- FER – For
- WID – With
- BT – Used as a pause, often a number of times.
- HPE – Hope
- CUAGN – See You Again. Often used towards the end of a CW contact (HPE to CIAGN) SK End of QSO
- QTH – Location
- WX – Weather
- There are countless others!
More Hints. Not necessarily in any particular order.
- Use a paddle rather than a straight key. Less tiring & lighter, better formed dots and dashes.
- Always use head phones.
- Use your radios memories (if available) to store pre-recorded messages such as CQ.
- Learn how your radio switches between SSB and CW (CW tone offset) so you will be on about the right frequency.
- Sending signal reports: Ever wondered why practically all DX-Peditions and contest stations give 599 reports? It is easier! If someone is really solid, send 599. If they are good copy but not solid send 559. Only use other figures if things are really difficult. Unless the station worked is using home brew equipment or you are on VHF and there is an aurora, the tone will be 9 (If aurora propagation the tone is sent with an “A” as a suffix). More often than not, the same report will be used by both stations in the qso.
- When practicing, try to take in the CW sent without writing it all down. Just take a few notes. Journalising will occur in live transmissions. Certain combinations of letters often follow each other. This is actually the beginning of learning CW by whole words (by sound) rather than each individual character.
- Practice tuning into CW transmissions. Look for signals on DX clusters then try tuning them.
- Get as much listening practice as possible. Some sources are:
- VK2WI 80 metre CW beacon 3.6990.
- VK CW nets 40 metres on Sunday morning are good.
- Any other live to air CW that you can here. Contests are good.
- ARRL practice files http://www.arrl.org/code-practice-files
- ARRL Bulletin & Code transmissions http://www.arrl.org/w1aw-operating-schedule
- Live to air is good as there will be interference, fading and other normal stuff.
- Experiment with filter settings when monitoring live CW.
- Don’t be afraid to answer a CW CQ call.
- Knowing the call sign of a station is worth 3 to 6db. There are a limited number of active SOTA CW operators. However you will from time to time come across a regular CW operator that may want to chat. What to do? You are the activator. Take control, send TU 73 CQ.
- A Chaser will probably have information on the Activator prior to the QSO. The Activator will have little information on the chaser. Chasers, send your call sign 3 times initially.
- Know your name in CW. Abbreviate it if too long. Not sure what to do with Marshall?
- As an activator, qualify the summit first on CW. You will find chasers being prepared to work you on CW in order to avoid the SSB dog pile & fear that there may not be an SSB operation. The exception to this maybe when first coming up on air; some operators start by looking for S2S contacts, any mode and usually this is on 40 metres.
- Technically, if a VK3 operator is portable in VK2 they should sign as /2
- Have a scribble pad as well as your log book.
- Have fun!
You can download this article as a PDF from Ron.