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Two Antenna Stack Match
Solves antenna matching problem with two phased antennas Provides convenient and flexible antenna switchingVacuum relays provide reliable high power operation
post 30 Sep 2024
Antenna Duplex duplexer Links →
Coupleurs Antennas for 2,4,6
The 1/4 wave of adaptation is calculated = Zo = root of Z1 x Z2 i.e. Zo = root of 50 x 100 = 70.7 ohm , D / d = 3.1 on the abacus formula corrected for the square section example: D = 20 mm and d = 6.5 mm
Cosa c'e' in un duplexer
Duplexer HF-VHF 1,6-150 MHz-UHF 410-480 MHz
Constructing a Six Meter Heliax Notch Filter
All of this started a couple of years ago when an unused Telewave 45 MHz duplexer was discovered at a repeater site. Maybe we could get it to work on six meters
Build a 2-Meter Duplexer
Who has already put a repeater on the air and ask him, What's the toughest technical problem you had with it? He will probably say that obtaining sufficient signal isolation
50
The 1/4 wave of adaptation is calculated = Zo = root of Z1 x Z2 i.e. Zo = root of 50 x 100 = 70.7 ohm , D / d = 3.1 on the abacus formula corrected for the square section example: D = 20 mm and d = 6.5 mm
Duplexer HF-VHF 1,6-150 MHz-UHF 410-480 MHz
All of this started a couple of years ago when an unused Telewave 45 MHz duplexer was discovered at a repeater site. Maybe we could get it to work on six meters
Who has already put a repeater on the air and ask him, What's the toughest technical problem you had with it? He will probably say that obtaining sufficient signal isolation
PIC-Keyer This project describes the construction of a real "QRP" keyer with a small microcontroller PIC 16F84, with slightly modified hardware also PIC16F62
RF Inductance Calculator Mean diameter of the air core coil, measured from conductor centre to conductor centre include the wire insulation thickness, if any
Voice Recorder Gestito dall'integrato in questione ed offre la possibilità di registrare più messaggi per una durata massima di un minuto con buona fedeltà di riproduzione