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Z-Match antenna coupler for high performance


For most applications, a capacity of 350 pF for C1 and 2x230 pF for C2 is sufficient, if you want to cover the bands 10-80 m, an extension for 160 m will be presented later
post 14 Mar 2024
Z-Match antenna coupler for high performance

Antenna Transmatch tuner Links

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Un adattatore di antenna portatile
Con il classico schema a pi-greco si può costruire un semplice adattatore di antenna che permette di usare filari di lunghezza casuale in tutte le bande, e anche in 80 e 160

Un moderno accoppiatore variabile per bobine
Un sistema pratico, economico e funzionale per realizzare un accoppiatore variabile per bobine, gia' usato nella Radio a reazione presente nel sito, consiste nell’utilizzare un tubetto vuoto di colla per ufficio

Z match qrp covers 10 thru 80 meters
I ordered the variable capacitors from Emtech, they are the type used in the Emtech ZM-2 tuner

Z-Match Tuner for QRP
My favourite antenna tuner is the single coil Z-Match 100 watt

Z-match 8 bandes
It allows a continuous tuning, without switching but using the two CVs, a Lévy or Zeppelin antenna from 3.5 to 30 MHz


23cm Yagi Antenna building

23cm Yagi Antenna building Finished antenna at 1275 MHz SWR under 1:1.5 at resonant frequency

50 MHz preamp Gain 26dB with the BFG135

50 MHz preamp Gain 26dB with the BFG135 Preamps for 144 and 430 MHz, for 50 MHz, the BFG135a is a cheap transistor and in my view rather strong. It is not easily damaged by static discharge or RF power. FG connection

30 Volt Computer Power Supply Stack

30 Volt Computer Power Supply Stack A bonus was that i discovered that these did not need a standby load connected to the supply to keep them running just apply mains power and close the Start lead to ground