Malo ja o tehnici... (nista ozbiljno)

[9a4db]

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Evo ga, stari dobri CD4066 plus LED je rješenje za sve... u svakom je po 4 sklopke
a meni treba 7 + 7 segemenata plus TX i low power indikator, tj. decimalne točke.
dakle 16 sklopki u 4 chipa. Plus 2 kom LED po 7 segmenata sa dec. točkom.
Sve stane unutra na mjesto starog LCDa...

Razmišljao sam i o LCD 3 1/2 znamenke to je ovaj lijevo na slici ali njega bih
morao stavljati na kutiju izvana.

[9a4db]

Moderna tehnologija je tema za danas
Dva DSP RXa koji bi vas mogli zanimati.

Prvi jeftin a efikasan te drugi ne tako jeftin ali pokriva zanimljive bandove....

$75
http://www.countycomm.com/gp5ssb.html
https://www.youtube.com/watch?v=0hopz-5cEsU

$599
http://www.commradio.com/cr-1-cr-1a-reference/
https://www.youtube.com/watch?v=ZYKYNCLIbqU

[9a4db]

A sada nešto digitalno a nije DSP....
https://www.kickstarter.com/projects/74 ... ransceiver

Specifications

Form Factor: Arduino-compatible stackable shield

Arduino Pins: I2C; GPIO, PWM and ADC

Frequency RX/TX: 134-174MHz, 200-260MHz, 400-520MHz

Amateur Radio Bands: 2 Meter, 1.25 Meter, 70 Centimeter

Power Output: 250 milliwatts (preliminary)

Radio SoC: Auctus A1846S

Channel Bandwidth: Selectable between 12.5KHz and 25KHz

Subaudio Modes: CTCSS, CDCSS (transmit/receive independent)

Advanced Features: Volume, Squelch, VOX, DTMF encode, DTMF decode, tail noise elimination, tone generator, tone detector, RSSI

Pre-Emphasis: Can be disabled to assist with digital modes

Antenna Connector: SMA, 50 Ohm (optional "rubber duck")

Audio Connection: Hardware selectable between TRRS (mobile phone style headset) and Arduino PWM/ADC inputs and outputs, PWM/ADC smoothing filters built in

Input Voltage Range: 5-20VDC, 4xAA, 7.4 volt lithium battery pack, power adapter capable

[9a4db]

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Prošlo ljeto nabavio sam polovni FT817... par sitnica je trebalo popraviti
a najveći problem je bio ovaj encoder, koji jednostavno ima rok trajanja.
(Bez seta mini torx-a se ne upuštajte u to - ovo plavo)

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Najvrijedniji dio na uređaju je ustvari ovaj DSP filter...
Uz prisutni nivo šuma na bandovima danas, bez njega - tko se jednom na dobro nauči, ne može.

Na linku imate, što ljudi kažu o tom DSP-u
http://www.eham.net/reviews/detail/3626

[9a6r]

Đani,daj molim te javi mi se na moj mob... DONE / edit 9A4DB
73,9A6R

[9a6r]

Đani hvala na ugodnom razgovoru i savjetima.GL 73 DE 9A6R

[9a4db]

Eto mene malo opet....
Misli moja malecka iz bijeloga svijeta na svog taticu
Na "ebaj" ovakva stvar vrijedi 100-150 USD plus prijevoz 50-80 USD,
meni došlo na kućna vrata uz veliku pusu...

RLC Electronics A-4020A DC-3Ghz, 200W, 40db Attenuator za onaj moj Agilent E7495B
To bi kao bilo kada narinem 200 W na izlazu se vidi 0.02 W ili 20 mW / 13.01 dBm, meni dosta...
Jer ->

The maximum power for the RF In (Port 1) and RF Out/SWR (Port 2) ports is
+20 dBm (100 mW)

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kalibracija ->

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Ovo je bazni Agilent E7495B instrument , na slici u remote modu na PC preko Ethernet IP servisa...

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[9a4db]

Ne palim lemilicu, prevruće je za to, ali zato se proučava literatura

https://archive.org/details/vacuumtubemanuals

[9a4db]

Jedan zgodan SDR....
100 kHz to 2 GHz with an 8MHz bandwidth
http://sdrplay.com/docs/SDRplay_Technic ... n_r1p4.pdf
http://sdrplay.com/index.html
http://hackaday.com/2015/09/25/mid-pric ... /#comments

[9a4db]

Puno, puno linkova na pdf knjige o radio tehnici....
http://www.qsl.net/va3iul/Files/Old_Rad ... _Books.htm