filters

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filters

179 links - and 4 categories

Antennas : Feed Lines
  • To transform ot not to transform - Feed Lines - Transmission lines have many uses other than simply transferring RF power from one point to another. Impedance matching, baluns and filters are probable the most common of these.
    [ Hits: 137 | Votes: 0 | Rating: 0 ]
Antennas : Feed Lines : Coax Stubs
  • Coax Stubs for 20m and 40m - When operating contest in a multi transceiver environment interferences between the 40m and 20m are guaranteed. An easy and inexpensive way to reduce interferences is to add coax stub filters
    [ Hits: 243 | Votes: 4 | Rating: 8.5 ]
Antennas : Quadrifilar Helix
  • NOAA Satellite Reception with QFH Antenna - How to receive NOAA weather satellite with a home made QFH Antenna. This project includes some easy and efficient notch filters to suppress noise from FM frequencies
    [ Hits: 257 | Votes: 1 | Rating: 8 ]
Manufacturers : Filters
  • VA6AM Contesting Accessories - Custom built high and low power power band pass Filters, low band triplexers, triplexers and diplexers
    [ Hits: 118 | Votes: 0 | Rating: 0 ]
Operating Modes : Digital Modes
  • Digital Mode General Operating Tips - Start by getting your audio levels sorted out, Having your levels correct is critical to maximum effectiveness in both TX quality and also for being able to decode signals properly. Guide to Filters and other Rig Settings to optimize your output signal
    [ Hits: 183 | Votes: 1 | Rating: 9 ]
Radio Equipment : HF Transceivers : Yaesu FT-847 Radio Equipment : HF Transceivers : Yaesu FT-857
  • Replacing Yaesu FT857 IF filters - How to replace IF filters on a Yaesu FT 857. This document explains how to desolder old deteriorated filters and replace with brand new ones.
    [ Hits: 131 | Votes: 0 | Rating: 0 ]
  • Yaesu FT 857 Filters Repair - Replacing two ceramin filters of a Yaesu FT-857 by desoldering and soldering new ones.
    [ Hits: 98 | Votes: 0 | Rating: 0 ]
Shopping and Services : Accessories
  • Ham Goodies - Amateur Radio goodies for not only the Shack, but also a range of outdoor/portable kit. Ferrite toroids, RTL SDR, Un-uns and Baluns for antennas and RF Filters. Based in the UK.
    [ Hits: 144 | Votes: 0 | Rating: 0 ]
Shopping and Services : Antenna Parts
  • Aerial-Parts of Colchester - Online antenna parts store, providing many accessories for amateur radio antenna homebrewing. Boom joiners, aluminium parts, elements clamps, filters, ferrites, fasteners, plasti caps, dipole elements. Based in UL
    [ Hits: 153 | Votes: 0 | Rating: 0 ]
Shortwave Radio : Broadcasters
  • ShortwaveDB Map - Worldwide Map of shortwave transmitters. Based on shortwave schedule database, this website let you serarch using filters for broadcasts schedule and at the same time to diplay the transmitter map.
    [ Hits: 55 | Votes: 0 | Rating: 0 ]
Software : DX Cluster
  • ZCZ Cluster - Telnet client for DXCluster, Sorts, colours and filters DX Spots by (2) bands, wanted DX Station, who spotted the DX, local to your area and more, Can spot automatically after logging a contact if you are using ZCZ Log, Look up call on QRZ.com
    [ Hits: 158 | Votes: 0 | Rating: 0 ]
Technical Reference : Audio
  • JRC NVA-88 Modification - Adding 2 RCA inputs, 1 high impedance filtered audio output RCA 3, 3 HIGH PASS filters, 3 LOW PAS filters to the JRC NVA88 Speaker
    [ Hits: 54 | Votes: 0 | Rating: 0 ]
Technical Reference : Calculators
  • Bandpass Filter Calculator - Passive Bandpass Filter online calculator and filter formulas. Active Inverting Op Amp Bandpass Filters, Active Noninverting Op Amp Bandpass Filter, just enter the Low ir High Cutoff Frequency
    [ Hits: 157 | Votes: 3 | Rating: 5.33 ]
Technical Reference : Filters
  • 20m 30m 40m Bandpass Filters - Homemade LC Bandpass Filters for 20M, 30M, 40M In multi-station environments like special events, field day, portable operating, is very important to protect receivers from excessively strong signals. Bandpass filters help to protect your transceivers.
    [ Hits: 376 | Votes: 1 | Rating: 10 ]
  • Band Pass Filters for HF Transceivers - If your multiple transceiver station is suffering of intrastation interference, this handy and inexpensive band pass filters and help you. QST article Sept 1988
    [ Hits: 127 | Votes: 0 | Rating: 0 ]
  • A compact 5 bands remote switchable BPF - These band filters are based on 3 or 5 sections Butterworth band pass filters, maintaining 50 Ohm impedance, and when built around toroidal inductors, can be made very compact.
    [ Hits: 221 | Votes: 0 | Rating: 0 ]
  • Enhancing Frontend Performance with Optimized Band Pass Filters - This article explores the nuanced design challenges of Band Pass Filters (BPF) in radio receivers, balancing low insertion loss, high stop band rejection, and narrow bandwidth. The focus is on the "Series-Trap, Shunt-C" topology, resonator count impact, and meticulous layout design for superior stop band performance across various frequency bands
    [ Hits: 82 | Votes: 0 | Rating: 0 ]
Technical Reference : Transverters
  • Transverter for 50 70 28 MHz - This multiband transverter project features power output at 13,8V 50MHz 15W, 70MHz 10W, second harmonic <65dBc. Single N connector of antenna, suitable for a dual band Yagi. Article include Block Diagram for Dual Transverter and low pass filters
    [ Hits: 151 | Votes: 1 | Rating: 10 ]

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