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Category: Technical topics [The best tech related sites] (9)
Category: Technical topics (9)
The best tech related sites 		Referrals
  Jim Brown, K9YC
Highly interesting writings on ferites, baluns, EMI, RFI and audio, 		159
  Owen Duffy, VK1OD
A hi-tech site with wide collection of design tips. 		148
  F1FRV
Linear amps, the R-140 army transmitter mods, power supplies, tuners, SWR meters, sequencers, bias circuits, complete triode and tetrode amp boards and lots of other technical stuff. A must see! 		50
  W8JI
160 Meters, amplifiers, antennas, boatanchors, FT 1000 MK V Mod Noise Blanker / Click, FT1000D Click Mod NB modifications. Tons of tech stuff, very sophisticated. 		36
  W8WWV
Greg Ordy's Antenna and Other Experimentation. Lots of very useful antenna stuff. 		57
  K3KY
Flag and Pennant Antenna Compendium. Very useful stuff for top band & LF freaks. 		74
  Dallas Lankford on Receiving Antennas
Dallas Lankford of Ruston, LA, for has for many years been a reference for the DX community in general. Although AM MW DX focused, his results can be applied to 160 m band and slightly modified also to 80 m. 		35
  PA0FRI - technical information for Hams
Lots of tech tips (amps, antennas, ATU and lot more) and old equipment mods. Also mostly english but some in flemish only. A must see! 		34
  PA0SIM
Some examples of what can be found on this site:
- small active receiving loops
- dual loop antenna system
- phaser / noise canceller
- effective directivity by DSP (phasing and muting)
- enhanced stereo reception by DSP
- SSB and CW Noise Reduction
- CW filter optimized for weak signal reception
- Two phase coherent Software Defined Radio’s (two Elecraft K2 receivers as SDR)

I highly recommend the phaser / noise canceller which is one of most sophisticated designs I ever seen. 		44