filter303 links - and 4 categories
Antennas : 40M : 40 meter Loop Antennas
- Receiving antenna for low bands
- K9AY loop antenna installed at PA6Z Contest group. This is a receiving antennas for the low bands (160m, 80m and 40m). Include schematics and info on a building the control box, preamplifier and low-pass filter
[ Hits: 18660 | Votes: 9 | Rating: 8.33 ]
- Band Filters
- Experience of band filters, for a contest multi operator enviroenment
[ Hits: 3792 | Votes: 5 | Rating: 7.6 ]
- DXFun Web Cluster
- DX Cluster mainly in spanish, with chat, filtering available upon user registration, propagation reports and solar status, includes also latest dx news.
[ Hits: 4436 | Votes: 34 | Rating: 6.14 ]
- We produce duplex filters for 6 m, 2 m, 70 cm, and 23 cm band but also for HF bands.
Sella and produce products for Ham Radio Repeaters.
[ Hits: 1785 | Votes: 1 | Rating: 1 ]
- Micro908 Kit
- A re-usable control & computing platform for
antenna measurement, PSK31 digital modems, audio filtering, signal source & VFO, memory keyer by AMQRP
[ Hits: 1446 | Votes: 1 | Rating: 10 ]
- Broadband instruments, R and microwave components and filters, field analyzers, spectrum analyzers
[ Hits: 470 | Votes: 0 | Rating: 0 ]
- Garth RF Filters
- ATV Filters, RF filters dealer
[ Hits: 684 | Votes: 2 | Rating: 6.5 ]
- Audio processor for SSB transceiver
- This circuit consists of microphone amplifier and a high pass filter. Suitable to improve signal readability.
[ Hits: 1335 | Votes: 1 | Rating: 1 ]
- Diplexer design notes
- Standard diplexer design is based on singly-terminated Butterworth filters.
[ Hits: 5349 | Votes: 8 | Rating: 5.87 ]
- A low cost UHF/VHF duplexer
- Duplexers for dual band radio are usually high pass filter and low pass filter combined in the same box. This circuit is a design within a cost of US$10.
[ Hits: 8027 | Votes: 14 | Rating: 5.5 ]
- Interferences and filtering
- General information on Filter passbands, interferences, TVI and RFI problems
[ Hits: 1103 | Votes: 1 | Rating: 10 ]
- 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: 1594 | Votes: 2 | Rating: 9.5 ]
- The NVARC Ugly Filter Project
- Project to build sets of band pass transmitting filters for reducing the interference between HF transceivers operated in close proximity
[ Hits: 909 | Votes: 4 | Rating: 9.5 ]
- Narrow Band-Pass filter for HF
- Band-pass filters can be critical components in
competitive stations. This setup may help
put your station on the map.
[ Hits: 2125 | Votes: 1 | Rating: 1 ]
- Clean Up Your Signals with Band-Pass Filters
- These inexpensive, easily built filters can be the buffer you need between the signals you want to hear and send and those you don't!
[ Hits: 3001 | Votes: 0 | Rating: 0 ]
- Clean Up Your Signals with Band-Pass Filters part 2
- Part 2 You're now much closer to saying
goodbye to your unwanted signal problems!
[ Hits: 1178 | Votes: 0 | Rating: 0 ]
- Band-Pass Filters for HF Transceivers
- Do your multiple-transmitter field day or contest efforts suffer from intrastation interference ?
[ Hits: 3575 | Votes: 2 | Rating: 9 ]
- K2TR Coax Stub Filters
- Multi transmitter filters
[ Hits: 2941 | Votes: 7 | Rating: 6.43 ]
- Second-Harmonic-Optimized Low-Pass Filters
- Sometimes we need a little more output filtering than traditional designs offer. Look at a new filter that can give you that extra boost. QST article by W3NQN
[ Hits: 737 | Votes: 0 | Rating: 0 ]
- CW Filter
- I0QM Gaussian CW Filter page
This Filter for the weak signals is the evolution of the simple Universal State filter, already published on "Radio Rivista", the 8/1993
[ Hits: 1693 | Votes: 2 | Rating: 8 ]
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