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350 links - and 5 categories

Coax Stubs for 20m and 40m - DH1TW
When operating contest in a multi transceiver environment interferences between the 40m and 20m are ...

[ Hits: 243 | Votes: 4 | Rating: 8.5 ]
Coax Notch Traps - Attenuating adjacent bands - AC0C
Targeted Attenuation for Adjacent Bands Filtering is needed between the two rigs to prevent physical ...

[ Hits: 134 | Votes: 0 | Rating: 0 ]
The Quarter-wave stub - LA8OKA
The Quarter wave stub can be used for many purposes If it is left with ...

[ Hits: 136 | Votes: 1 | Rating: 8 ]

DXCenter DX Cluster - SV2AGW
Online world map with live updates from the DX Cluster network displaying new spots on ...

[ Hits: 353 | Votes: 2 | Rating: 5.5 ]
URE WebCluster - URE
Online DX Cluster provided by URE Union Radioafocionados Espanoles Provide current band status propagation map ...

[ Hits: 60 | Votes: 0 | Rating: 0 ]

N3TUQ DX Maps - N3TUQ
DX Cluster spots represented in a google map for 10m 6m 2m bands taken from ...

[ Hits: 112 | Votes: 0 | Rating: 0 ]

World of Receivers and Transmitters - rx-tx.info
A searchable database of online websdr receivers lists OpenWebRX KiWi SDR and WebSDR from all ...

[ Hits: 307 | Votes: 3 | Rating: 4 ]

VA6AM Contesting Accessories - VA6AM
Custom built high and low power power band pass Filters low band triplexers triplexers and ...

[ Hits: 119 | Votes: 0 | Rating: 0 ]

FT2000 Roofing Filter Installation - AC0C
A step by step guide to install the NS Roofing filter into the Yaesu FT ...

[ Hits: 110 | Votes: 0 | Rating: 0 ]

Yaesu FT 857 Filters Repair - US7IGN
Replacing two ceramin filters of a Yaesu FT 857 by desoldering and soldering new ones ...

[ Hits: 98 | Votes: 0 | Rating: 0 ]

WinRFCalc Free Windows RF Calculator - PA3AKP
A multi tool Windows program that has been designed to offer the EMC RF and ...

[ Hits: 213 | Votes: 0 | Rating: 0 ]

A switched Capacitor Audio Filter - AA8C
Here is a rather nice audio filter for use with Ham Radio gear It features ...

[ Hits: 73 | Votes: 0 | Rating: 0 ]

Bandpass Filter Calculator - learningaboutelectronics
Passive Bandpass Filter online calculator and filter formulas Active Inverting Op Amp Bandpass Filters Active ...

[ Hits: 171 | Votes: 3 | Rating: 5.33 ]

Audio CW Filter - g4aon
An home madek Audio CW Filter made simply using SMD Components

[ Hits: 174 | Votes: 0 | Rating: 0 ]
ICOM IC-775 FIlter Installation - PA0Q
Inrad Roofing Filter installation instruction The IC 775 Roofing Filter Mod consists of a 6 ...

[ Hits: 62 | Votes: 0 | Rating: 0 ]
20m 30m 40m Bandpass Filters - AB2EW
Homemade LC Bandpass Filters for 20M 30M 40M In multi station environments like special events ...

[ Hits: 388 | Votes: 1 | Rating: 10 ]
Band Pass Filters for HF Transceivers - K4VX
If your multiple transceiver station is suffering of intrastation interference this handy and inexpensive band ...

[ Hits: 129 | Votes: 0 | Rating: 0 ]
A compact 5 bands remote switchable BPF - ON7EQ
These band filters are based on 3 or 5 sections Butterworth band pass filters maintaining ...

[ Hits: 224 | Votes: 0 | Rating: 0 ]

17 meter QRP Transmitter - KB9II
1 watt 17 meter cw transmitter that was originally done about 10 years ago as ...

[ Hits: 122 | Votes: 0 | Rating: 0 ]

A Simple Spectrum Analyzer - AA8C
This is a swept filter spectrum analyzer Basically RF and swept oscillator signals are fed ...

[ Hits: 121 | Votes: 0 | Rating: 0 ]