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353 links - and 4 categories

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: 803 | Votes: 0 | Rating: 0.00 ]
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: 1257 | Votes: 5 | Rating: 7.40 ]
Manufacturers : Filters
  • W3NQN CW Audio Filter - Maker of passive cw audio filter kit designed in the 1980s
    [ Hits: 269 | Votes: 0 | Rating: 0.00 ]
  • 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: 130 | Votes: 0 | Rating: 0.00 ]
Radio Equipment : HF Transceivers : Icom IC-706 Radio Equipment : HF Transceivers : Kenwood TS-590S
  • CatFix for TS-590S - A free windows tool that controls IF Filter switching and permit to configures the TS-590S for proprt digital mode operations by G3NRW
    [ Hits: 671 | Votes: 1 | Rating: 10.00 ]
Software : Android
  • SOTA Spotter - SOTA Spotter is an application written for devices running Android™ versions 4.0.3 and above (like smartphones and tablets). It can send spots, filter and trigger notifications for incoming spots.
    [ Hits: 369 | Votes: 3 | Rating: 9.67 ]
Technical Reference : Calculators
  • FIlters calculator - Passive Band-Pass Filter, low-pass filter calculator
    [ Hits: 301 | Votes: 1 | Rating: 2.00 ]
Technical Reference : Filters
  • 432 144 MHz Notch Filter - Combined 432 MHz High-Pass - 144 MHz Notch Filter By Bertrand Zauhar, VE2ZAZ
    [ Hits: 373 | Votes: 1 | Rating: 1.00 ]
  • Roofing Filters - An Introduction to Roofing Filters by ACØC
    [ Hits: 341 | Votes: 0 | Rating: 0.00 ]
  • CW Filter Kit - Building the W3NQN CW Filter Kit Step by Step by AK3W
    [ Hits: 328 | Votes: 0 | Rating: 0.00 ]
  • 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: 346 | Votes: 0 | Rating: 0.00 ]
  • 70 MHz low pass filter - An home made low pass filter for 70 MHz by IK0VAQ
    [ Hits: 477 | Votes: 2 | Rating: 4.50 ]
  • 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: 371 | Votes: 0 | Rating: 0.00 ]
  • CW Notch Filter - Homebrew CW notch filter project by KN9B
    [ Hits: 398 | Votes: 0 | Rating: 0.00 ]
  • Use Band Pass Filters to clean up Signals - Clean Up Your Signals with Band-Pass Filters, a two-parts article published in this PDF file from a June 1998 QST article
    [ Hits: 519 | Votes: 0 | Rating: 0.00 ]
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: 368 | Votes: 0 | Rating: 0.00 ]
Technical Reference : Microphones
  • SSB Microphone Filter - Build this circuit to tailor your microphone response to different band conditions. A project by KG4JJH
    [ Hits: 344 | Votes: 1 | Rating: 1.00 ]
Technical Reference : Receivers : Progressive Receiver
  • Using Inrad Xtal filter - Using the Inrad 200 Ohm 9 MHz Crystal Filter with the Progressive Receiver
    [ Hits: 254 | Votes: 1 | Rating: 10.00 ]
Technical Reference : Test Equipment : RF Sweep Generator
  • RF Sweep Generator - Notes about generating RF sweep signals on the Arduino for filter testing, a digital version of the old Wobbulator concept
    [ Hits: 452 | Votes: 0 | Rating: 0.00 ]

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