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297 links - and 4 categories

Antennas : Coils
  • Coil Winding Tips - Tips on winding wire coils used as inductive loads, traps, band-pass filters, are implemented in a number of amateur radio projects especially antenna projects
    [ Hits: 660 | Votes: 2 | Rating: 3 ]
Antennas : K9AY
  • K9AY 160m 80m receiving loop antenna - A K9AY loop antenna project done with Far Circuits pc boards for the antenna switch and bandpass filter and preamp by K7SFN
    [ Hits: 807 | Votes: 0 | Rating: 0 ]
DX Resources : Clusters : Mobile DX Cluster
  • DXHeat - The responsive DX Cluster, feature live dx cluster spots, available both on desktops and mobile devices with easy filtering optiosn. Offer a rich cluster analytics for each call.
    [ Hits: 1276 | Votes: 5 | Rating: 7.4 ]
Manufacturers : Cable and Connectors
  • L-com - WiFi Antenna, WiFi Amplifier, RF Splitters, RF FIlters, Adapter, Video Cable and Custom Connectivity Products
    [ Hits: 197 | Votes: 0 | Rating: 0 ]
Manufacturers : Filters
  • Anatech Electronics - Anatech Electronics manufactures RF filters for communication systems, Military and commercial, as well as RF filters for Wireless applications. Products include, Band pass filters, Duplexers, Low pass, high pass and bandstop filters. Additional products such as RF cable assembly also available.
    [ Hits: 139 | Votes: 0 | Rating: 0 ]
Manufacturers : QRP Kits
  • HF Projects Kits - Provide service, quality home construction projects, travel antennas, masts and bases, hf and vhf amplifiers, low pass filters and z-match tuners
    [ Hits: 582 | Votes: 0 | Rating: 0 ]
Radio Equipment : HF Transceivers : Icom IC-706 Radio Equipment : Receivers : Drake R-4C Shopping and Services : Amateur Television
  • Harlan Technologies - Producers of custom name tags, luggage tags, club badges, Employee Name Tags, Special Event Badges, but also Comtech Amateur Radio Television Transmitters and Receivers D480 filters, Video cameras and accessories.
    [ Hits: 228 | Votes: 0 | Rating: 0 ]
Software : Android : DX Cluster
  • DX Cluster for Android - Get live DX spots on your Android device. DX Cluster for android is a real time DX spots client, show different bands and mode filters, a country filter for spotter or the spots, prefix or call sign alarms. Download from Wolphi Solutions
    [ Hits: 836 | Votes: 2 | Rating: 5 ]
Software : Filter Design
  • ScopeIIR - ScopeIIR: an Infinite Impulse Response (IIR) digital filter design tool for Windows. It designs high-order IIR filters based on analog filter prototypes, and can design lowpass, highpass, bandpass, and bandstop filters.
    [ Hits: 611 | Votes: 2 | Rating: 5.5 ]
Technical Reference : Filters
  • Cheap Crystal Filter - An economical way of building an SSB filter. The circuit is for a filter with a 6 DB band width of roughly 2.2 KHz.
    [ Hits: 375 | Votes: 0 | Rating: 0 ]
  • Bandpass filters design - How to design narrowband bandpass filters
    [ Hits: 596 | Votes: 4 | Rating: 2 ]
  • 432 144 MHz Notch Filter - Combined 432 MHz High-Pass - 144 MHz Notch Filter By Bertrand Zauhar, VE2ZAZ
    [ Hits: 377 | Votes: 1 | Rating: 1 ]
  • Roofing Filters - An Introduction to Roofing Filters by ACC
    [ Hits: 349 | Votes: 0 | Rating: 0 ]
  • A home-built low-pass filter for 4m - This unit uses four capacitors, only two of which are variables, and a single tapped coil. It is built in a die-cast box, and has been tested up to 80W input power on 70MHz by G4CJZ
    [ Hits: 354 | Votes: 0 | Rating: 0 ]
  • 70 MHz low pass filter - An home made low pass filter for 70 MHz by IK0VAQ
    [ Hits: 491 | Votes: 2 | Rating: 4.5 ]
  • 50 MHz Terminating Low Pass Filter - This low pass filter terminates all harmonics from the 2nd to above the 10th harmonic in a better than 15 db return loss load
    [ Hits: 380 | Votes: 0 | Rating: 0 ]
  • CW Notch Filter - Homebrew CW notch filter project by KN9B
    [ Hits: 402 | Votes: 0 | Rating: 0 ]
Technical Reference : Homebrew
  • A CW Sidetone Bypass - A CW sidetone bypass for the NESCAF audio filter, a small and low cost circuit that works great.
    [ Hits: 376 | Votes: 0 | Rating: 0 ]

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