Works on all amateur bands from 1.8 MHz through 54 MHz

Sometimes many VHF-UHF modern tranceivers have problems

The performances of this band filter are very comparable

Design and performance of a QRO low pass filter for 50 MHz

The filter published there is working without problem and needs no or very little tuning

with my original 4m tranverter system which had a decent pa i needed a lpf low pass filter on the output

Spike noise is a high frequency pulse that rides

designed to be placed in the 75 Ohm coax

This unit uses four capacitors, only two of which are variables Jackson

expensive than working with mechanical switch

There are applications where a particular band, or spread

response to obtain the goal of a reasonable 300-2400 Hz filter

Passive audio filters have been around for many years,If your receiver didn't have a CW filter, this little jewel worked fairly well

Band pass filter circuit & transfer function active & passive

band phase noise interference is not usually

10 meter filter, all the other filters are housed

An inside view of 160 meter and 10 meter BPF

The very narrow bandwidths associated with crystal filters does not pose a problem for qrss

You should not need to use a narrowband filter after a transmitter

This calculator is suiteable to calculate the length of a piece of coaxial cable to produce a notch at a desired frequency

El circuito de este generador de ruido lo bajé de la webv

Fill out the form below to design a bandpass filter as described

Design a third order low-pass Chebyshev filter with a cutoff frequency

A series of Bandpass Filters designed for the input tuning

progettare e realizzare un filtro passa basso per applicazione TVI

serve per attenuare i segnali al di sopra dei 450 KHZ

varius filters and ferrites for solving amateur radio EMC

EME traffic for example requires a radiated power

Essendo rimasto lusingato dai risultati del filtro direte sull’alimentatore per gli apparati a 12 volt

Questo filtro si interpone tra voltmetro selettivo o un qualsiasi ricevitore e antenna

Questi filtri erano montati di serie all'interno di TUTTI gli alimentatori per Personal Computer

both stubs are 1/4 lambda the line between the stubs is 1/4 lambda

A high-pass filter's task is just the opposite of a low-pass filter

build a low-pass filter for 145 MHz as required after power amplifiers

For a 5 band filter I used following parts out of my junk box

Besides the same performance of YF-122C, it feature

If your receiver's audio passband bandwidth is too wide and other nearby signals you need a cw filter

interference can be used to select a narrow frequency

With winter approaching, many HAM and SWL hobbyists find intrigue in tuning in NDB

Like many people, I have a general coverage receiver

remove the insulation from the wire at the base of the core as shown

This type of filter can be used in a Mode J satellite station

QRM eliminator, of radio interference

Comparisons between Chebyshev and Butterworth filters

This site is dedicated to design and analysis of micro- and millimeter

Basically, an electrical filter is a circuit that can be designed to modify

Describes an simple low pass filter, according to his finding suitable for 2 kW power

This circuit may be used to eliminate an unwanted carrier when trying to copy weak stations

The QLF filter is a microprocessor based interface designed to go between

Have some times problems with local noise on the lower bands.view this project QRM Eliminator

attenuating the phase noise and harmonics of the typical

suitable spectral purity of the order of -60 dB

Attenuation 160-15m filters 70db rejection of other bands. 10m filte

the FCC requires transmitter spurious output

1000 watts on 160 and 75 meters that my telephones were susceptible to fairly significant RFI problems

a 3-pole and a 5-pole, which one you use depends on how selective you want the filter to be, and the insertion loss to be tolerated

In home-brewing a single sideband (SSB) transmitter, an essential

First, this is not a construction article. This article describes

What to do, if your neighbour comes banging at your door just in that moment you want work the DX of the year

Therefore we, ham radio operators, should stop TVI etc

low-pass filters in which the unwanted high-frequenc

Grounding, Screening, Filtering, and Rusty Bolts Effects

The cut-off frequency or ƒc point in a simple RC passive filter can be accurately

per eliminare i disturbi di modo comune captati dal cavo coassiale

One of the most used yet least understood techniques

RF power into the sample port

In some cases the input filter of a VHF Broadcast receiver for 87.5 - 108 MHz

This is a 6-band receive only filter designed to protect your receiver

The attenuation in the 2m band was >80dB

The function of the XPhase is based on the fact that the interfering signal