band stop23 links
Antennas : 20M
- Helical loop antenna for 20 meters
- A Helical Loop Antenna for the 20-meters Band
[ Hits: 5602 | Votes: 2 | Rating: 8.00 ]
- 2 element yagi wire beam
- A 2 element yagi wire-beam antenna for the 20 meter band based on the KJ5VW design
[ Hits: 1128 | Votes: 4 | Rating: 2.00 ]
- A Six element yagi antenna for the 50 MHz
- Christoph petermann's df9cy six element yagi antenna for six meter band
[ Hits: 1632 | Votes: 4 | Rating: 8.00 ]
- 80 meters spiral loop antenna
- N4SPP 80 meters band spiral loop antenna based on SM0VPO design
[ Hits: 4455 | Votes: 6 | Rating: 5.83 ]
- Folded dipole antenna by N4SPP
- A quarter size cobra dipole antenna, a multiband dipole antenna for 40 to 10 meters basedn on original cobra dipole design but with a limited space by N4SPP
[ Hits: 2264 | Votes: 1 | Rating: 8.00 ]
- Magnetic Loop 80-20 by N4SPP
- A transmitting magnetic loop antenna that can cover from 80 to 20 meters band with a lot of experiments on coupling tecniques, and a pictures by N4SPP
[ Hits: 1530 | Votes: 6 | Rating: 5.33 ]
- W4JOH Cobra Antenna
- The original Cobra antenna, is a multiband 160 or 80 to 10 meter, designed by W4JOH is built using standard insulated wire of about 14 gauge and fed with 450 ohm ladder line down to the shack into a tuner.
[ Hits: 1433 | Votes: 1 | Rating: 10.00 ]
- Short vertical antenna for 80 Meters
- A short antenna for 80 meters band , article with pictures and details by N4SPP
[ Hits: 1195 | Votes: 3 | Rating: 4.00 ]
- Cobra Ultralite Antenna
- A multi-band wire-dipole using multi-conductor cable on each leg.
[ Hits: 1599 | Votes: 0 | Rating: 0.00 ]
- ZS6BKW Multiband antenna system
- ZS6BKW optimized version of the venerable G5RV and different antenna placement on the roof and terrace by N4SPP
[ Hits: 2461 | 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: 88 | Votes: 0 | Rating: 0.00 ]
- K2 Change 20 30m band filter
- Elecraft K2 mod. Narrower bandpass filter, better stopband attenuation
[ Hits: 136 | Votes: 0 | Rating: 0.00 ]
- IDSP is an app for IPHONE and IPOD Touch.
Made by 2 powerful filters, a band pass and a band stop with adjustable bandwidth. Filters are butterworth 4 and 8 poles, sample rate at 44,100 32 bit. Cancel every noise and hear only your qso.
[ Hits: 1304 | Votes: 1 | Rating: 1.00 ]
- 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: 529 | Votes: 2 | Rating: 5.50 ]
- This program expedites the design of lumped-element diplexers using both the lowpass/highpass and the bandpass/bandstop topologies.
[ Hits: 1281 | Votes: 5 | Rating: 4.60 ]
- YCCC 6 Band Receive Bandpass filter
- This is a 6 band receive only filter designed to protect your receiver front end and provide 45dB reject at the stop bands.
[ Hits: 1476 | Votes: 2 | Rating: 9.50 ]
- Band-stop filter
- Wikipedia page on Notch filter, a narrow stopband - high Q factor filter
[ Hits: 261 | Votes: 2 | Rating: 2.50 ]
- Notch Filter Designer
- Online calculator, Butterworth Bandstop (Notch) Filter Designer
[ Hits: 617 | Votes: 6 | Rating: 3.33 ]
- VK5VKA 's non technical bpl/plc information
- VK5VKA page contains general information and comment on "BPL" (Broadband over Power Lines) or as it is known elsewhere "PLC" (Power Line Communications).
[ Hits: 290 | Votes: 0 | Rating: 0.00 ]
- TVI and BCI Filters
- TVI and BCI bandpass and bandstop filters in SMD technique. Schematics and images.
[ Hits: 4112 | Votes: 6 | Rating: 5.00 ]
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