Prepare the key
Select CW and leave break-in OFF and TRANSMIT disengaged. Set Key Type to match the hardware; an external electronic keyer needs Straight.
Radio guides / Icom / IC-7300MK2
CW599 ORIGINAL OPERATING WORKFLOWNEW
IC-7300MK2CW Operating Guide
Get from a newly connected key to a deliberate first contact. This guide explains the MK2 controls, how to listen before transmitting, and how to use its decoder without letting an uncertain decode become a logged callsign. It is a separate guide from the original IC-7300.
IC-7300MK2CW operating workflow
Checked 2026-09-06: English Basic 2ato2b (84 PDF pages), Advanced 0 (90 PDF pages). References below use printed page numbers. Listed factory defaults follow the USA scope stated in the Basic manual; regional settings and later firmware may differ. Guide v1.1; this is document verification, not a hardware test.
START HERE
A five-step CW setup routine
Use this order as an operating checklist, not as a replacement for the radio manual. Controls and available options can vary by firmware and region.
Set the sound and speed
Use MULTI for KEY SPEED and CW PITCH. Listen to separate dots and dashes with no RF output before choosing a comfortable sending speed.
Tune before narrowing
Find the station by ear, then adjust the IF filter and APF. If auto tune chooses a neighbour, tune manually and compare the tone again.
Check one short transmission
Listen for a clear frequency, select BKIN and use appropriate low power. Check that key-up returns to receive before trying memories or full break-in.
Add memories and decode
Review M1–M8 text and the serial counter. Open CW DECODE only after the signal is tuned; check uncertain letters by ear.
MODEL SETTINGS INDEX
CW settings, paths, and starting points
Search the model-specific CW controls below. Menu labels and ranges are drawn from official documentation; the notes are original CW599 operating guidance.
Keyer
Key Type
- Access path
MENU > SET > CW-KEY Set > Key Type- Options or range
- Straight / Bug / Paddle
- Factory value / operating start
- Factory: Paddle
CW599 note: Choose by the device, not your preferred speed. Paddle uses the internal keyer; an external keyer supplies its own timing and uses Straight. With break-in off, confirm a single press produces the expected element.
Keyer
KEY SPEED
- Access path
CW: press MULTI > KEY SPEED; rotate MULTI- Options or range
- 6–48 WPM
- Factory value / operating start
- CW599: choose a comfortable speed
CW599 note: This changes the internal keyer timing, not the other station’s speed. Send a short familiar word in sidetone and lower the setting if elements or spaces become uneven.
Receive
CW PITCH and sidetone
- Access path
CW: MULTI > CW PITCH; SET > CW-KEY Set > Side Tone Level- Options or range
- 300–900 Hz (5 Hz); level 0–100%
- Factory value / operating start
- Factory level: 50%; pitch: operator choice
CW599 note: Pitch changes the heard tone without moving the operating frequency. Adjust the level separately at modest headphone volume; verify both the received note and your own keying remain comfortable.
Keyer
Paddle Polarity
- Access path
MENU > SET > CW-KEY Set > Paddle Polarity- Options or range
- Normal / Reverse
- Factory value / operating start
- Factory: Normal
CW599 note: Use Reverse if the expected dot and dash sides are exchanged. Test each side separately with break-in off before squeezing both paddles.
Keyer
Dot/Dash Ratio
- Access path
MENU > SET > CW-KEY Set > Dot/Dash Ratio- Options or range
- 1:1:2.8–1:1:4.5 (0.1)
- Factory value / operating start
- Factory: 1:1:3.0
CW599 note: Keep the neutral ratio while learning the key. Lengthening dashes cannot repair rushed character spacing; compare a recording before changing the ratio.
Break-in
Break-in and delay
- Access path
CW: VOX/BK-IN; hold 1 s for delay, rotate MULTI- Options or range
- OFF / BKIN / F-BKIN
- Factory value / operating start
- CW599: OFF for practice, then BKIN
CW599 note: OFF permits sidetone practice while the radio is in standby. BKIN holds transmit briefly after key-up; F-BKIN listens between elements. Verify amplifier and relay timing before using full break-in.
Break-in
Rise Time
- Access path
MENU > SET > CW-KEY Set > Rise Time- Options or range
- 2 / 4 / 6 / 8 ms
- Factory value / operating start
- Factory: 4 ms
CW599 note: This shapes the RF envelope; it is not the receive-return delay. Keep the default unless an actual signal check shows a need to change it.
Receive
IF filter width
- Access path
CW: hold IF filter indicator 1 s > select FIL 1/2/3 > BW; rotate MAIN DIAL- Options or range
- 50–500 Hz (50 Hz); 600–3600 Hz (100 Hz)
- Factory value / operating start
- Factory CW: FIL 1 1200 Hz; FIL 2 500 Hz; FIL 3 250 Hz
CW599 note: Centre the wanted signal before narrowing. IF bandwidth separates nearby signals before audio processing; APF is a separate control. If copy becomes worse, widen BW and retune. Changing BW resets Twin PBT to centre.
Receive
Audio Peak Filter
- Access path
CW: FUNCTION > 2 > APF; hold APF 1 s- Options or range
- SOFT: WIDE / MID / NAR; SHARP: 320 / 160 / 80 Hz; 0–6 dB
- Factory value / operating start
- Factory: SOFT, WIDE, 0 dB
CW599 note: Tune first, then narrow only until the wanted note separates from interference. Compare APF on and off at similar loudness; a louder tone alone is not better copy.
Receive
CW DECODE adjustment
- Access path
MENU > KEYER/DECODE > CW DECODE > function menu 2 > ADJ- Options or range
- THRESH / FILTER / SPEED
- Factory value / operating start
- CW599: tune first; adjust one item at a time
CW599 note: THRESH separates keying from noise; FILTER selects what the decoder follows; SPEED controls timing recognition. The reviewed manual calls its manual speed option MANUAL, while current product copy uses KEYSPEED linked. Follow the labels on your firmware and verify uncertain characters by ear.
Memory / PC
Memory keyer
- Access path
MENU > KEYER/DECODE > KEYER > EDIT/SET > EDIT- Options or range
- M1–M8; 70 characters each
- Factory value / operating start
- CW599: replace sample callsigns before use
CW599 note: Write a short CQ with your own callsign, then audition in standby with break-in off. A one-second hold on a memory key starts repeat; touch it again to stop. Listen between calls.
Memory / PC
Contest serial
- Access path
MENU > KEYER/DECODE > KEYER > EDIT/SET > 001 SET- Options or range
- Present Number: 001–9999; Number Style; Count Up Trigger
- Factory value / operating start
- Factory: Normal; M2/M5; 001
CW599 note: Check which memory advances the counter and replace inherited contest text. Compare the displayed number to your log before an exchange; the minus-one control corrects an accidental increment.
Memory / PC
USB CW keying
- Access path
MENU > SET > Connectors > USB SEND/Keying > USB Keying (CW)- Options or range
- Match the software COM port and DTR/RTS assignment
- Factory value / operating start
- Factory: OFF
CW599 note: Configure CI-V control and CW keying separately. A terminal already used for SEND or RTTY cannot also be assigned here. Test with RF transmission inhibited before opening your contest software on an antenna.
No matching settings. Try a shorter search or clear the search and category.
CW599 RECOMMENDATIONS
Three operating starting points
These are original operator-oriented starting points. They are not factory presets and intentionally avoid claiming model-specific default values.
First CW contact
A calm setup for learning the radio.
- Keying: Use the hardware mode that matches your key
- Break-in: Start conservatively with semi break-in
- Receive: Prioritize comfortable pitch and level
Weak signal listening
A patient workflow for signals close to noise.
- Filter: Tighten gradually, while preserving your preferred tone
- AGC / audio: Avoid changing several receive controls at once
- Tuning: Use the radio display only as an aid; copy by ear
Faster exchanges
For operators who need quicker station turnaround.
- Break-in: Only increase switching speed after a full station check
- Keyer: Confirm paddle direction and weighting before calling
- Station: Verify amplifier, relay and interface behavior first
Questions and troubleshooting
Why is KEYER/DECODE missing?
Select CW first. This control is mode dependent. Its short-press behaviour can also be changed in MENU SET; a different initial screen does not mean the keyer has disappeared.
Why does the decoder copy another station?
Its automatic filter can follow the strongest signal. Tune the wanted signal to the centre and try FIX; then compare THRESH and SPEED settings. Noise, fading and irregular timing still cause errors.
Can I send decoded text to my logging program by USB?
The official product documentation says CW decode output over USB is not supported. USB audio and computer keying are separate functions. Confirm the callsign yourself before entering a log.
Official model resource
Use the manufacturer-controlled product and support pages to verify your region, firmware, menus, connector wiring, operating limits, and safety information. CW599 does not host, mirror, or reproduce the manual.
Independent CW599 operating guide. Product names and trademarks belong to their respective owners. This page contains original workflow advice, not manufacturer instructions or an official endorsement.
Setting search and filters run in your browser and do not connect to or control your radio. Version 1.1 (2026-09-07) adds official transparent product images and language-specific resource labels; 1.0 introduced the bilingual guide. revisions are retained in site Git and deployment backups, with no separate archived guide page yet.