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70Mc-s Low Pass Filter


The filter published there is working without problem and needs no or very little tuning
post 21 Feb 2024
70Mc-s Low Pass Filter

RF Filter Links

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Band-Pass Filters for HF Transceivers
from intrastation interference these handy and inexpensive filters can help

Clean Up Your Signals with Band-Pass Filters
design of band-pass filters that provide a level of selectivity and reliability heretofore unavailable

Clean Up Your Signals with Band-Pass Filters
a series of band-pass filters BPFs between 150 W transceivers and 1500 W amplifiers

Crystal band pass filters for QRSS applications
a good RX band pass filter will be an important feature of any future design

Coaxial Stub Filters
You should not need to use a narrowband filter after a transmitter


40m Compact 4-Square Antenna

40m Compact 4-Square Antenna Compact 4-Square Antenna – EA5AVL The EA5AVL 40M Compact 4-Square Antenna was designed to provide excellent DX communications on the 40m band

The K9AY loop antenna for 160 and 80m bands

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Spiderbeam 10-15-20m

Spiderbeam 10-15-20m E' una Yagi tribanda full-size leggera, fatta di tubi in vetroresina e filo