channel pass

Open Channel - CB radio site for UK including repairs and much more

San Diego Radio Emergency Communications - San Diego REMCOM volunteer group specializes in serving the county and hospitals during drills and disasters. All members are FCC licensed radio responders, certified in ICS training, have passed security background checks with signed confidentiality statements.

M3HXS Amateur Radio Website - The purpose of my website is to give my radio contacts a place to find a bit of information about me and my amateur radio history, also to my passion for Amateur Radio.

Greenup County, Kentucky Live Police Scanner - Greenup County(Northeast, KY) Live PD/FD Scanner at USTREAM.TV

K2NCC's YouTube Channel - Video samples of amateur radio, military, government, domestic and international data transmissions. Covering such digital modes as ACARS, CHIP, DOMINO, JT65, MT63, NAVTEX, and many more by K2NCC Frank

HI-Z Antennas - HF receiving systems and components, band pass filters, array controllers, HI-Z pre amplifiers

Vishay BCcomponents - manufacturer of passive electronic components, emerged from Philips Electronics Components, ceramic capacitors, resistors, fuses, varistors

How Satellite Doppler Tracking Works - The Doppler Effect allows the distance between a satellite transmitting from space and a radio receiver on the ground to be measured by observing how the frequency received from the satellite transmitter changes as the satellite approaches, passes overhead, and moves away.

Ten-Tec Jupiter 538 Repair - Low-pass filter relay and reverse polarity repair notes by VE7TK

ICM Components - ICM Components is a company supplying Semiconductor & Passive Components, stocking most surface mount packages in I.C & Capacitors.

SuperSmith - Program to mechanize Smith Chart operation This graphics-intensive program is a valuable transmission-line calculator for both advanced and beginning users. Based on the venerable and highly intuitive Smith chart, it provides high-accuracy computations without recourse to paper, compass or straightedge.

IDSP - 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.

Windipoles - Windipoles is a free passive filter simulator. It is a Windows .NET executable, so no software installation is required. It enables design, analysis, optimizations and plots, all graphically.

EOO - Earth Orbit Objects is free program which predict satellite passes for your local or any selected area. Use flat Earth view to display satellite tracks with visibility circle. The globe view shows selected satellites around the Earth as a sphere and sky view shows satellites as you would see them in a starry night.

High power amplifiers by pass relays  ^updated - These relays are only to be used for output power who exceeds conventional antenna relays specifications.

Low Pass Audio Filter - 440 Hertz peaked low pass audio filter experiments

Bandpass and I.F. Filters - On this page a popcorn highpass filter, some inductors and their Q , double tuned bandpass filters and simple Cohn Crystal ladder IF filters are presented.

W3LPL Receiving Bandpass Filters - Project of receive only filters optimized for minimal loss and very high rejection of frequencies below 75% of the filter center frequency by K1TTT

High Pass Filters - Understand how high pass filters are done

Using Band-Pass Filters - Clean Up Your Signals with Band-Pass Filters

Receiver Band-Pass Filters - Third-order Cauer filters can boost performance of multi-transmitter, multi-operator contest stations to the next level. The filters are practical and you don’t need expensive test equipment to align them.

Passive CW headphone filter  ^updated - This filter is a plug in adapter that has no batteries but gives very good performance by G8MNY

1.5KW 6m Low Pass Filter - This filter is designed to follow a FULL legal limit, GS-35B, 6m linear amplifier. Designed and built by Bill Jones, K8CU

The Rock-Mite CW Kit - The Rock-Mite is a 40m CW kit offered by Small Wonder Labs . It features built-in keyer, direct conversion receiver with a crystal RF bandpass filter, 500 milliwatts of power, and switchable frequency offsets to work around QRM

Ferrite in EMC applications - Electro-magnetic compatibility EMC issues arise when electronic systems interact in an un-desired way