70Mc-s Low Pass Filter

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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

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70

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

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DHD Double Half Delta

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Visual CW Tuning Indicator

Visual CW Tuning Indicator Many transceivers set the CW transmit off-set equal to the set's sidetone frequency. But it was left to the operator how to match incoming signals to the sidetone for one-frequency QSOs an awkward and time-consuming procedure

Convert ADIF to Cabrillo Format

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trap-dipole-7-10-14-18-50-mhz

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Diy Arduino CW keyer

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