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  1. 70cm vertical antenna
  2. Duplexer filter for 2m and 70cm dual band antenna
  3. JPOLE for 440 MHz
  4. Super JPOLE antenna
  5. A Feasible Full Sized 40 Meter Beam
  6. A DISCONE antenna project
  7. Logperiodic dipole array
  8. Multi Band Antenna Traps
  9. 6 Element 1255 MHz Yagi for portable ATV use:  pic1, pic2, pic3, pic4, pic5

  10. AM/FM FAX interface :  GIF1  /  GIF2  /  GIF3  /  GIF4  /  GIF5  /  GIF6

  11. Audio aplications:

    1. Speech processor with elektret mike
    2. Simple audio preamplif for electret mike
    3. ECM microphone preamplifier Hi-Fi AF Preamplifier
    4. Microphone preamplifier and filter
    5. SSB and CW filter, AF amplifier
    6. Automatic Gain Controll
    7. Mike compresser

Fox hunting:   Lov na lisicu

  1. Fox hunting trcvr control unit with Microhip PIC microcontrollers

  2. 80m fox hunting receiver
  3. Morse Code Speedometer using the PIC 16F84

Frequency meter, digital scale:

    1. Digital scale with PIC 16F84
    2. Frequency meter with PIC 16F84
    3. Universal frequency counter & voltage meter (link)
    4. 3.5GHz prescaler (divide by 1000)
    5. CMOS frequency meter
    6. PC DTMF decoder with M8870 IC :  GIF1  /  GIF2  /  Decoder program

Packet radio:

"Cheap"  1k2 packet radio modem

TNC2 -  version by my friend HA8FY (Zsolt) 

The most simple radio modem for RTTY, CW, SSTV

1K2 packet radio modem with TCM3105

1k2 packet radio modem with XR2211

1k2 packet radio modem with FX614 (MX614) - schematic

Power amplifier:

      1. 2m power amplifier by LA0BY/DF9PY
      2. 50MHz power amplifier by JH0WJF
      3. 80m hexfet power amplifier by W7ZOI
      4. High dynamic range RF amplifier
      5. 1296MHz high gain amplifier
      6. 432 MHz kilowatt amplifier by W1QWS
      7. 60W solid-state UHF linear power amplifier (for 432 MHz) by K2OVS
      8. 350W QRO with GK71 for 160-15m
      9. 100W HF linear amplifier with MRF454
      10. 100W HF linear amplifier with GU50
      11. 10w HF amplifier with KT907
      12. 1w HF QRP
      13. 25w QRO with PL504
      14. 5w QRP with KT907
      15. 13cm power amplifier
      16. Converting a PCS Power Amplifier to 13cm Ham Radio Band
      17. 23cm 40W PA with M57762
      18. 23cm 20W PA with M57762

    1. RF Preampliers:

2 Meter GaAs FET Preamp by KD9JQ

  1. U310 FET preamplifier

  2. 23 cm GaAs FET Preamplifier

  3. Generic High Gain 3 Stage IF amplifier
  4. Front end
  5. TS711A 1st IF amplifier ~ 16dB gain
  6. Wide Band High OIP, low noise amplifier
  7. 6m preamplifier by W1FB
  8. RF preamplifier by VE7GC
  9. 1296MHz GaAs FET Premplifiers
  10. 70cm Preamplifier
  11. Fet preamplifiers for 2m and 70cm
  12. Low noise preamplifier for 23cm
  13. Low noise preamplifier for 50 and 144 MHz
  14. Bandpass Filters

RX:  Šeme radio prijemnika

  1. ZN414 Portable AM Receiver
    ZN414 SW Receiver
  2. VHF FM receiver with TDA7000
  3. 80m direct conversion receiver by VK1PK
  4. Superhet receiver for 80m band by VK3YE
  5. 3-30 MHz AM receiver
  6. Ramsey 40m receiver
  7. 80m one chip receiver with NE602
  8. Simple 80 or 40m receiver 40-Metre Direct Conversion Receiver - can be used for receiving amateur radio QSO signals in CW as well as in SSB mode in the 40-metre band
  9. 4 Band Double-Tuned Preselector - covers MW and Sw to 30MHz
  10. Aircraft Receiver - A passive receiver for listening to the pilot, pdf file
  11. Build your own superheterodyne receiver - simple three-IC superheterodyne radio to receive stations in the 4.5- to 10-MHz range
  12. Classic detector enables low-cost receiver - super-regenerative receiver's sensitivity is better than 1 mV, and it operates over a wide range of VHF
  13. Electronic Eaverhopping Device Detector - detects transmitters in 1-1000 Mhz range
  14. Single chip builds tiny aircraft receiver - simpel AM receiver for 108 to 135 MHz using single-chip NE605
  15. Spectrum analyser kid - simple spectrum analyzer for frequencies between 0 and 33 MHz

Synthesizers/VFOs:

  1. CMOS RF synthesizer
  2. DDS VFO
  3. 10.1MHz VFO
  4. DDS / PLL based universal synthesizer by S56AL (link)
  5. 144 MHz DDS
  6. HT220 frequency synthesizer by WA4DSY
  7. 3 band VFO (160-80-40m)
  8. RF oscillator for 1000-1500 MHz
  9. RF oscillator for 350 - 1000 MHz
  10. RF oscillator for 1.2 GHz - 2.4 GHz
  11. RF oscillator for 450 - 1000 MHz
  12. RF oscillator for 1420 - 2250 MHz

Transceivers:

  1. 2m FM transceiver  in PDF - 2m.rar (880kb)

  2. 70cm WBFM transceiver for packet radio by YO5CRI in PDF - 70cm.rar (510kb)

  3. (SUPER!) T7F - 70cm FM/FSK transceiver by Holger Eckardt, DF2FQ
  4. Voice Operation with the T7F
  5. User interface for T7F
  6. 19200Bps with the T7F
  7. Schematics and PCB's for T7F
  8. Terminal for programming the T7F
  9. RF amplifier for CCIR band (88 - 108 MHz)
  10. Simple FM transmitter for 88 - 108 MHz
  11. 20m 10W SSB transceiver by JF1OZL
  12. 160m 6W CW transceiver by JF1OZL
  13. 80m 5W CW transceiver by JF1OZL
  14. 80m 10W SSB transceiver by JF1OZL
  15. 70cm QRP SSB transceiver by JF1OZL
  16. Simple 70cm QRP FM transceiver by JF1OZL
  17. Simple 6m CW transceiver by VE7GC
  18. 40m transceiver by K8IQY: GIF1 , GIF2 , GIF3
  19. Pocket sized 20m (or 30m) single band 4W CW transceiver by S56AL (link)
  20. 80m 5W SSB/CW transceiver by S56AL (link)
  21. 6m SSB/CW transceiver by S56AL (link)
  22. 3W FM transmitter
  23. 14 MHz SSB 10mW transceiver by JF1OZL
  24. 3.5MHz SSB 10w transceiver by JF1OZL
  25. 50MHz 10mW handy transceiver by JF1OZL
  26. 430MHz SSB transceiver by JF1OZL
  27. 7MHz CW transceiver with MC3362 by JG1EAD
  28. HF all band SSB-CW transceiver by JG1EAD
  29. HF 5 bands SSB-CW transceiver by EI9GQ
  30. 13cm 50mW ATV TRCVR
  31. 23cm 1.5W ATV TRCVR
  32. Low-cost ATV 23cm preamp with CF300
  33. Wideband FM 10GHz transceiver with 30MHz IF
  34. 2.3GHz ATV transceiver
  35. 23cm FM ATV transceiver by S51KQ: pic1, pic2, pic3, pic4
  36. 13cm FM ATV transceiver by ON7IZ: pic1, pic2, pic3, pic4

RF   Dividers

RF divider by 64 with SAB6456 (SDA2101)

RF divider by 64/128/256 with MB506
RF divider by 64/128/256 with NEC506
RF Divider by 10 with K193IE2
RF Divider by 4 with K193IE7

RF divider by 10/11 with SP8695

ATV-Projekte 

    1. ATV- SWISS ATV: http://www.swissatv.ch/Zone_labs.htm

      ATV  1.2-2.3-10-47GHz: http://f5ad.free.fr/ATV-QSP_menu.htm

      ATV Projekte von dh2bam: http://www.rheinecke.de

      ATV : http://server.darc.de/distrikte/g/T_ATV/atv.htm

      ATV: http://members.tripod.lycos.nl/PI6ATV/software.htm

      ATV-Projekte F1LXL: http://perso.club-internet.fr/houssinj/rx3cm/index.html

      ATV-Projekte F5AYE: http://perso.wanadoo.fr/f5aye

      ATV-Projekte DL1IE: http://home.t-online.de/home/w.otterbach/projekte.htm

      ATV-Projekte  I3QNS: http://www.qsl.net/i3qns

      ATV-Projekte  OE3AJC: http://www.qsl.net/oe3ajc

      ATV-Projekte  OH1AA: http://www.wakkanet.fi/oh1aa/oh1aa-atv.html

      ATV-Projekte  ON9CJX: http://users.pandora.be/on9cjx

      ATV-Projekte  PE1BVJ: http://www.qsl.net/pe1bvj

      ATV-Projekte  PI6DIG: http://home.wanadoo.nl/pi6dig/

      ATV-Relais DB0KAN  Michael DL1GNM: http://www.qsl.net/db0kan

    2. Radio Related
      Harry's Homebrew One of the best
      Beacons and Utilities A site full of useful information
      Brian Smith's site A nice site with a couple of schematics
      Official Pirate Radio Transmitter Kits Interesting site featuring Transmitters
      Signal Surfer DX Club
      LW, MW, SW, and VHF.Worldwide.
      Millennia II  best tunable amplified preselector for 150KHz to 30 MHz
      RF Circuit Analysis Program -  Bob Stanton
      Jordan's RF & Microwave site

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