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© Copyright 2001 - 2011. All rights reserved  by Dragoslav Dobricic, YU1AW.

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If you built any amplifier according to published projects, please send me pictures for web publishing!

My e-mail adress: ddobricic <at> gmail.com

 

NEWS:

04. Aug. 2013.     New 20 kW 2m power amplifier with GU36B-1.

27. Mar. 2012.    Published new and improved version 1.7 of Excel  spread sheet for Q factor and overall antenna quality (Figure Of Merit) calculation.

28. Jan. 2012.    Published Excel  spread sheet for Q factor and overall antenna quality (Figure Of Merit) calculation.

16. Mar. 2011.    EU mirror site:  www.yu1aw.ba-karlsruhe.de  is not available any more, due to server problem.

14. Feb. 2011.     EME history: YU1AW-JA6CZD SSB EME QSO live recorded in spring 1982.  Link on You Tube: http://www.youtube.com/watch?v=SjHHSM1d4zY

30. Nov. 2010.    Results of independent laboratory measurements of GS35B 2m "Lazy Bilders" PA, conducted by Tomáš, OK1GTH.

10. Sep. 2010.     PANICK V - New 5kW Power Amplifier for 2 m band with 2 x 3CPX1500A7.

01. Jun. 2010.     My new article "Printed Omni Directional Wi-Fi Antenna for 5.6 GHz" published in USA magazine "antenneX", June 2010, Issue No.158.

01. May. 2010.     My new article "Coaxial Cable Influence on Yagi Antenna Array Noise Temperature" published in USA magazine "antenneX", May 2010, Issue No.157.

01. Apr. 2010.     My new article "Pillbox Antenna for 5.6 GHz" published in USA magazine "antenneX", April 2010, Issue No.156.

01. Mar. 2010.     My new article "Yagi Antenna Boom Influence on UHF " published in USA magazine "antenneX", March 2010, Issue No.155.

01. Feb. 2010.     My new article "Yagi Antenna Insulated Elements Boom Correction " published in USA magazine "antenneX", February 2010, Issue No.154.

26Jan. 2010.     New  1 x MRF151 MOS Power Amplifier for 2 m Band.

01Jan. 2010.     My new article "Yagi Antenna Elements Square Boom Correction " published in USA magazine "antenneX", January 2010, Issue No.153.

01Dec. 2009    My new article "Yagi Antenna Elements Boom Correction " published in USA magazine "antenneX", December 2009, Issue No.152.

01Nov. 2009    My new article "Coax Cable Feeder Influence on Four Stacked Yagi Antennas Array" published in USA magazine "antenneX", November 2009, Issue No.151.

01. Oct. 2009.     My new article about Coax Cable Feeder Influence on Yagi Antenna - Part 2 published in USA magazine "antenneX", October 2009, Issue No.150.

01. Sep. 2009.     My new article about Coax Cable Feeder Influence on Yagi Antenna published in USA magazine "antenneX", September 2009, Issue No.149.

01. Aug. 2009.     My new article about Boom distance influence on Yagi Antenna published in USA magazine "antenneX", August 2009, Issue No.148.

15. Jul. 2009.      Atmospheric static discharge protection for Amos and Quados antennas.

01. July 2009.     My new article about Triple Folded Dipole Feed for Yagi Antennas published in USA magazine "antenneX", July 2009, Issue No.147.

02. Jun. 2009.     My new article about Yagi and other antennas published in USA magazine "antenneX" ,June 2009, Issue No.146.

01. May 2009.     My new article about Yagi and other antennas published in USA magazine "antenneX"

02. Feb. 2009.      Results of independent measurements of BGF135a preamplifier  for  50 MHz band.

31. Jul. 2008.      New Duobander  GI7B or GI46B 6m+4m Lazy Builder's Power Amplifier

24Jan. 2008.      New 2xGU81M power amplifier  for all HF bands 1.8- 28 MHz.

23Jan. 2008.      New extremely hi-dynamic BGF135a preamplifier  for all HF bands 1- 30 MHz.

20. Mar. 2007.      New horizontal polarization Quados 4, 6 & 8 Sector Antennas for 2.4 GHz WLAN Access Points, covering 70 deg (-3dB), and 90 deg (-6dB).

04. Mar. 2007.      TXT in English for Shortened 3D Corner Reflector Antenna

04. Feb. 2007.      TXT in English for Amos Antenna

20. Jan. 2007.      New OBELISK Sector Antenna for 5.8 GHz WLAN Access Points, covering 40 deg (-3dB), and 55 deg (-6dB). (Corrected)

20. Jan. 2007.      New OBELISK Sector Antenna for 2.4 GHz WLAN Access Points, covering 40 deg (-3dB), and 55 deg (-6dB). (Corrected)

30. Nov. 2006.      New Duobander  GS35B 6m+4m Lazy Builder's Power Amplifier

16. Oct. 2006.      New improved GS35B 2m Lazy Builder's Power Amplifiers

07. Jun. 2006.      New Inverted AMOS 3 Sector Antenna for 2.4 GHz WLAN Access Points, with broader vertical angle, covering 85 deg (-3dB), and 120 deg (-6dB).

23. May. 2006.      New Inverted AMOS 5 Sector Antenna for 2.4 GHz WLAN Access Points, covering 75 deg (-3dB), and 110 deg (-6dB).

17. May. 2006.      New  AMOS 3 Antenna for 2.4 GHz WLAN Access Points, with broader vertical angle, covering 110 deg (-3dB), and 160 deg (-6dB).

03. May. 2006.      New  Inverted AMOS 7 Antenna for 2.4 GHz WLAN Access Points, covering 75 deg (-3dB), and 105 deg (-6dB).

20. Apr. 2006.      New  AMOS 9 Antenna for 2.4 GHz WLAN Access Points, covering 130 deg (-3dB), and 175 deg (-6dB).

19. Apr. 2006.      New  Inverted AMOS 9 Antenna for 2.4 GHz WLAN Access Points, covering 70 deg (-3dB), and 100 deg (-6dB).

18. Apr. 2006.      New 2 x GI46B 2m Lazy Builder's Power Amplifier

21. Mar. 2006.      New 1 x GI46B 2m Lazy Builder's Power Amplifier

06. Feb. 2006.     New  Trimmed 3D Corner Reflector Antenna for 5.6 GHz band and Wireless LAN

12. Dec. 2005.     Simple splitter  design for two antennas at 2.4 GHz band and Wireless LAN

08. Nov. 2005.     New  Truncated 3D Corner Reflector Feed for Offset Dish for 5.8 GHz band and Wireless LAN

01. Nov. 2005.     New  2 el. BiQuad Feed Antenna for Offset Dish for 2.4 GHz band and Wireless LAN

05. Jul. 2005.      New extremely hi-dynamic BGF135a preamplifier for 50 MHz band with improved input selectivity.

19. Jun. 2005.     New  Trimmed 3D Corner Reflector Antenna for 13 cm band and Wireless LAN

08. Jun. 2005.      New 1 x GS31B 4m Lazy Builders Power Amplifier

21May. 2005.     New  1 x BLF147 and 2 x BLF147 P-P MOS Power Amplifier for 4 m Band.

06May. 2005.     New  AMOS Antenna for 13 cm band and Wireless LAN Access Points, covering 180 deg.

25Mar. 2005.     New  Modified 3D Corner Reflector Antenna for 13 cm band and Wireless LAN

21Mar. 2005.     New  PA with 1 x QB5/1750 tube for 6m Band  .

27Feb. 2005.     Articles Solid State 6m and 2m PAs   and Ultra Linear LNAs translated into English with courtesy of Andy, G8ATD.

21Jan. 2005.     New Simple Harmonic Filters for 6m, 4m, 2m, 135cm and 70cm PAs .

17Jan. 2005.     New duobander VHF PA with GU84B tube for 6m and 2m .

14Jan. 2005.     New duobander VHF PA with GU74B tube for 6m and 2m .

18. Dec. 2004.     New 1 x GU84B 2m Lazy Builders Power Amplifier

12. Dec. 2004.     New 1 x GU78B 2m Lazy Builders Power Amplifier

27. Nov. 2004.     New 1 x GU34B 2m Lazy Builders Power Amplifier

17. Nov. 2004.     With courtesy of  Mike, DL6IAK, fast mirror site has been opened at address:  http://yu1aw.ba-karlsruhe.de  or  http://www.yu1aw.ba-karlsruhe.de .

23Oct. 2004.    New 2m strip-line  PA with 1 x GU34B.

23Jun. 2004.    Tuning procedure hints for BFP196 Ultra Linear Low Noise Amplifiers with improved input selectivity.

08Jun. 2004.    New extremely hi-dynamic BGF135a preamplifier for 144 MHz band.

05Jun. 2004.    New VHF/UHF Arials page with Corner Reflector Antenna for 13 cm band and Wireless LAN

25Apr. 2004.    New page opened: Power Amplifier Projects for Experienced VHF/UHF PA Builders. 3-band VHF/UHF PA with GS31B tube.

20Apr. 2004.    New MS Excel worksheet for tube input and output resistances calculation.

10Apr. 2004.    New VMOS Solid State PA with 2xDV28120T P-P.

09Apr. 2004.    Input Parallel Grid Resistance diagram for some tetrodes.

17Mar. 2004.    New improved MS Excel worksheet for coils, helix and resonant RF chokes calculation.

06Jan. 2004.   New power amplifier for HF + WARC bands with GS31B calculated with aid of new developed Dynamic Tube Model .

16Dec. 2003.   New "Lazy Builders" power amplifier for 6m band with 4CX1500B

16. Dec. 2003.    New page opened: 23 cm Power Amplifiers. 23 cm band 2C39BA PA.

27Nov. 2003.   New "Lazy Builders" power amplifier for 2m band with 4CX1500A

22Oct. 2003.    New BFP196 Ultra Linear Low Noise Amplifiers with improved input selectivity for 50, 144 and 432 MHz Bands.

01Avg. 2003.    New MS Excel worksheet for coils, helix and resonant RF chokes calculation.

04Apr. 2003.    New extremely hi-dynamic BGF135a preamplifiers for higher HF and lower VHF bands.

14. Mar. 2003.    New improved version of  ATF54143 preamplifiers.

19Jan. 2003.    Strongly recommended modifications of old version ATF54143 preamplifiers.

13. Dec. 2002.    New page opened: HF Power Amplifiers

09Nov. 2002.   New "Lazy Builders" power amplifier for 2m band with 8877

09Nov. 2002.   New duoband power amplifier for 2m & 6m band with 8877 tube

31Oct. 2002.   New power amplifiers for 2m band with GS31B (with PTFE or Door Knob)

30. Sep. 2002.   AutoCAD files in DXF format for all Low Noise Amp. Printed Circuit Boards

28. Sep. 2002.   New power amplifiers for 6m band with GS31B and GS35B tubes.

26. Sep. 2002.   New power amplifiers for 2m and 70 cm band with GS35B tube.

16. Jul.  2002.    Balun Modification for solid state Push-Pull power amplifiers for 6m and 2m bands.

29. Jun.  2002.   1 x GS31B 70cm PA  redesigned using new developed, more accurate tube model! 

11. Jun.  2002.   Duobander Power Amplifiers are redesigned using new developed, more accurate tube model! 

11. Jun.  2002.   Power amplifiers for "Lazy Builders" are redesigned using new developed, more accurate tube model! 

13. Maj. 2002.   Power amplifier for 70 cm band with GS31B tube: 1xGS31B 70cm PA 

19. Apr. 2002.   New Duobander PA design: 1xGS35B 2m & 6m PA

27. Feb. 2002.   New Duobander PA design: 1xGI7B 2m & 6m PA

24. Feb.  2002.   Power Amplifiers for "Lazy Builders"

19. Dec.  2001.   Simulation IP3 and NF of Ultra Linear Low Noise Amplifiers for 144 and 50 MHz bands.

21. Oct. 2001.   AutoCAD files in DWG format for all Low Noise Amp. Printed Circuit Boards

15. Oct. 2001.   Ultra Linear Low Noise Amplifier for 220 MHz  Band

24. Aug. 2001.   New Duobander PA design: 1xGS31B 2m & 6m PA

 

© Copyright 2001 - 2011. All rights reserved  by Dragoslav Dobricic, YU1AW.


If you are interested, you can see my other projects for TV receiving and Cable TV distribution equipments manufactured by:

www.dipol.co.rs

 


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