move CWONDR project from scratch to dedicated repository, add link
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<h2>2018</h2>
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<h3>2018-06-23</h3>
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<ul>
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<li>z1710 f145975 mFM cDC6DD r24 # only heard vy weak with QRN, via satellite? on handheld</li>
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</ul>
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<h3>2018-05-11 ik2/hb9kns/p</h3>
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<ul>
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<em>NB: remains under copyright, i.e CC license does not apply here!</em></li>
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<li>favorite repeaters list in <a href="relais.md">Markdown</a>/<a href="relais.html">HTML</a> format</li>
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<li>my <a href="manifest.html">interests and beliefs</a> concerning amateur radio</li>
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<li><a href="https://github.com/hb9kns/cwondr">CWONDR</a>: dreaming of a pocket-size 70 cm CW transceiver for short range chatting</li>
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</ul>
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<hr />
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1
index.md
1
index.md
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*NB: remains under copyright, i.e CC license does not apply here!*
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- favorite repeaters list in [Markdown]( relais.md )/[HTML]( relais.html ) format
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- my [interests and beliefs]( manifest.html ) concerning amateur radio
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- [CWONDR]( https://github.com/hb9kns/cwondr ): dreaming of a pocket-size 70 cm CW transceiver for short range chatting
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---
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scratch.md
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scratch.md
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# scratchpad: ideas, notes etc
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## Pjt CWTRX
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low-power portable (70cm) CW transceiver, for short range contacts
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### general features
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- supply 5..12 V, optimized for 5 V (USB)
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- power save mode with electronic squelch
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- beacon mode: call sign transmission unless squelch open, pause
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- 1 direct memory DM, 2 working memories A and Z, 2 shadow memories + and - (each containing freq, power and squelch levels)
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- callsign memory for beacon operation
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- system status and memories retained during power off: 6 times (1 byte power level + 1 byte squelch level + 3 byte freq offset in Hz + 1 byte status) = 36 bytes, plus 25 bytes for call sign
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### RF section
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- TRX freq range at least 432000..432400 kHz, up to 438000 if possible; may be reduced for manual and automatic scans
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- antenna: dedicated socket / headphone cable / key cable
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- TX: 0.05, 0.5, 5 W; 0.5 default
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- RX: direct conversion with electronic 0.1 kHz steps or less
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### user interface
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- mechanical off/volume knob
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- 8 buttons: MENU, ESC, ENTER, +, -, A, Z, (RESET)
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- output by side tone in Morse code, default speed 20 WpM
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- LED optional (blinking with side tone)
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- 2 headphone jacks, optionally one with deactivated loudspeaker (low sound quality ok)
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- direct keying, elbug optional (selected by plug type?)
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#### button functions during normal operation (not settings menu)
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button press generates side tone, higher pitch when long press detected
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- MENU: settings (short) / direct (DM) store (long)
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- ESC: status report (short) / direct (DM) recall (long)
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- ENTER: transmit (short or long)
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- +, -: freq change (increasing step size when long press, indicated by increasing side tone pitch) with reporting of changed digits in case of increased step size
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- A, Z: working memory recall (short) / store (long)
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- (RESET): hidden button for factory defaults (long)
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status report: RX/TX freq (abbreviated inside range limits), battery level
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#### settings menu
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- while idle in settings, short beep every 2 sec
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##### button functions in settings menu
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- MENU: tell current item (short) / save and exit (long)
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- ESC: leave current menu (short) / abandon and exit (long)
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- +, -: change
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- ENTER: select current item
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- A: yes/set/all/max.value
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- Z: no/clear/zero/min.value
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##### settings menu items
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1. power level
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2. squelch level
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3. complete status and memory report
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4. semiduplex: TX using A/Z memory, notified by chirping sidetone, reset with ESC from this item or long ESC (DM recall) during normal operation
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5. switch direct memory (DM) and memory A/Z/+/- (shadow memories + and - only accessible this way), new DM freq reported with side tone
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6. receive offset (active after transmission and memory recalls, zero during scanning): reported by side tone beep, change by +/-, A/Z=1/0 kHz
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7. beacon text, enter as Morse code with up to 7 dots or dashes per character: A/Z=dash/dot, +/-=enter/delete character, MENU/ESC=save/abandon
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8. beacon and side tone speed in WpM (PARIS norm)
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---
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