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• Balun and Transformer Core Selection - Occasionally errors are made regarding core selection. This especially includes baluns, where on occasion some very strange ideas surface.
  [ Hits: 3798 | Votes: 3 | Rating: 6 ]
• Homebrew Balun Case - Balun case construction, tipically to host toroid cores. Size of case depends on power to handle. By DL5DBM
  [ Hits: 1345 | Votes: 1 | Rating: 10 ]

• Balun single core 4:1 analysis - Real 4:1 Transmission Line Balun with Balanced Load
  [ Hits: 6161 | Votes: 1 | Rating: 10 ]

• The Philco Repair Bench - Everything the antique Philco radio collector and restorer needs.
  [ Hits: 3783 | Votes: 16 | Rating: 9.25 ]

• RC.N Home of Radio Contesting - Interactive home for radio contesters. Includes scores database, access to contester chat, forums, real-time posting and near-real-time news feed.
  [ Hits: 768 | Votes: 1 | Rating: 6 ]

• DL1IAO Stefan - HF Radio Contesting and personal information: Latest scores, station tour, DL contest records and large photo section, maps and software
  [ Hits: 980 | Votes: 2 | Rating: 8.5 ]

• The National Contest Journal - The National Contest Journal, published bimonthly by ARRL, features articles by top contesters, letters, hints, statistics, scores, NA Sprint and QSO Parties
  [ Hits: 1306 | Votes: 2 | Rating: 8.5 ]

• Ham Logs Online - Put your Ham Logs online, compare contest scores, send and receive electronic QSL requests and more. The place to see if you finally worked them!
  [ Hits: 2600 | Votes: 6 | Rating: 1.83 ]

• Illinois QSO Party - The Radio Amateur Megacycle Society
  [ Hits: 480 | Votes: 2 | Rating: 6.5 ]
• Oklahoma QSO Party - Sponsored by the Oklahoma DX Association
  [ Hits: 372 | Votes: 1 | Rating: 10 ]

• W3MF John - General information page including contest scores, station pictures
  [ Hits: 476 | Votes: 5 | Rating: 8.6 ]

• Palomar Engineers - RFI Kit, ferrite cores, baluns, loop antennas, antenna tuners and various accessories
  [ Hits: 7897 | Votes: 16 | Rating: 5.87 ]
• Amidon Inc. - Ferrite Toroids. Iron Powder Toroids. Ferrite Beads. Split Cores. Cable clamp-ons. Balun Cores. W2FMI Baluns and Ununs. Inductive components for EMI Suppression and RFI Suppresion, power supplies, HAM radio.
  [ Hits: 2082 | Votes: 4 | Rating: 5.75 ]

• Kiwa Electronics - Kiwa Electronics is a company that specializes in accessory equipment for the radio enthusiast. Our products include Filter Modules to improve receiver performance, a High Performance Medium Wave Air Core Loop Antenna for improved broadcast band reception, the Pocket Loop Antenna, the Earth Monitor, BCB Rejection Filter and Broadband and SW Preamps. We also offer numerous performance upgrades for popular receivers.
  [ Hits: 3067 | Votes: 5 | Rating: 8.8 ]

• RTTY Contests - An RTTY only contest calendar, which includes scores and rules and records of recent and upcoming RTTY contests.
  [ Hits: 858 | Votes: 1 | Rating: 10 ]

• Cabrillo Evaluator by W3KM - Contest adjudication software scores Cabrillo logs. Auto evaluates up to 2000 logs with duping, claimed score, actual score, cross checking, N-QSO rule, 5-min delta QSO rule. Support including code changes, non-scoring logs troubleshoot and summary output requests.
  [ Hits: 2634 | Votes: 7 | Rating: 7.64 ]

• Audiocoreder - Audiocorder is a VOX program which allows your Macintosh to act as an audio recorder
  [ Hits: 3223 | Votes: 6 | Rating: 9.83 ]

• LA7MI 40W RF Amplifier for 80m - 40W Linear Power amplifier with FETs for 80m Some notes about saturation in ferrite- and iron-cores. Written by LA7MI Stein Torp, N-5005 Bergen
  [ Hits: 3024 | Votes: 2 | Rating: 1.5 ]

• Ferrite information - Ferrite Toroidal Cores, Magnetic Properties of Ferrite Materials, EMI - RFI Suppression Design Considerations, Ferrite Beads, Ferrites for RFI Ferrite Cores for RFI Suppression by CWS ByteMark
  [ Hits: 13700 | Votes: 4 | Rating: 5 ]

• Using ferrite for interference suppression - Excellent guide to using ferrite cores for interference suppression. Understanding and Solving RF Interference and Noise Problems by Jim Brown K9YC Audio Systems Group, Inc. PDF File
  [ Hits: 6161 | Votes: 6 | Rating: 9.5 ]

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