CC FT8 — Digital Mode Plugin for HamSphere 5.0
The HamSphere FT8 & FT4 Plug-in
CC FT8 brings full FT8 and FT4 weak-signal digital mode capability to your HamSphere station. Decode and transmit the world's most popular digital modes directly inside HamSphere — no external software, no WSJT-X, no sound card routing. Click a station on the band activity list and the plugin builds your entire reply sequence, tracks the timing slots, and works the QSO automatically.
Key features:
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Full WSJT-X-compatible decoder — complete LDPC + CRC error correction with frequency and time oversampling, exactly as in the reference implementation. Decodes standard messages, CQ calls, grid locators, signal reports and free text.
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Click-to-work QSO automation — click any decoded station in the band activity list and the plugin extracts their callsign, sets your transmit offset, converts the measured signal report into a sendable token, builds the full six-message reply sequence and arms transmit in the correct time slot.
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Unique per-callsign tone frequency — when you call CQ, your signal is automatically placed at a tone frequency derived from your callsign, so you never clash with other operators transmitting on the system at the same time.
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AUTO / MANUAL sequencing — in AUTO, the plugin steps through the standard QSO sequence and disarms cleanly after the final 73. In MANUAL, your selected message repeats each cycle for full hands-on control.
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Six-message TX sequence — the standard CQ, grid exchange, report, R-report, RR73 and 73 messages are built for you the moment you pick a station.
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Color-coded band activity — CQ calls in green, CQ DX in red, messages to you in orange, everything else in grey. Filter to CQ-only with one click, scroll back through history with the mouse wheel.
How to operate:
These are the FT6/4 operating frequencies on HamSphere:
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| Band |
FT8 (kHz) |
FT4 (kHz) |
| 160M |
1817 |
1819 |
| 80M |
3717 |
3719 |
| 60M |
5317 |
5319 |
| 40M |
7017 |
7019 |
| 30M |
10117 |
10119 (edge of beacon) |
| 20M |
14207 |
14209 |
| 17M |
18107 |
18109 |
| 15M |
21307 |
21309 |
| 12M |
24907 |
24909 |
| 10M |
28407 |
28409 |
Select your band — the correct FT8/FT4 frequency is set for you automatically. Watch the band activity list fill with decoded stations. To answer someone, click their row: the plugin builds your reply, picks the right time slot and arms TX. To call CQ instead, set the sequencer to AUTO, click row 1 (the CQ row), and press TX ON — your transceiver goes to ARM and your CQ transmits in the next available slot. When a station replies, click their row and the plugin works the rest of the QSO for you. Just keep an accurate clock — FT8 and FT4 depend on UTC-aligned timing.
Technical:
FT8 at 15-second slots, FT4 at 7.5-second slots. Full GFSK modulation with Gaussian pulse shaping. Complete WSJT-X-compatible receive chain: LDPC (174,91) belief-propagation decoder with 14-bit CRC, Costas sync detection, and frequency/time oversampling. Standard message, free-text and non-standard callsign unpacking with hashed-callsign lookup. 2048-point FFT waterfall with adaptive AGC. Automatic UTC slot-parity tracking with live QSO partner re-synchronization.
CC FT8 is a serious digital mode implementation built on proven, reference-grade DSP algorithms, wrapped in the clean and intuitive CC-Line interface you already know.
Compatible with all HamSphere skins. Requires HamSphere 5.0 or later.