en:lna
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en:lna [2013/07/24 20:47] – [Construction] kaklik | en:lna [Unknown date] (current) – external edit (Unknown date) 127.0.0.1 | ||
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- | A coil performing on 144Mhz has 7 turns of 0.5mm wire around a rod with a diameter of 4mm (__a drill__). The coil is ..? | + | A coil performing on 144Mhz has 7 turns of 0.5mm wire around a rod with a diameter of 4mm (__a drill__). The coil is stretched as seen in the picture. The capacitors |
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- | Cívka na 144MHz vychází 7závitů z drátu 0,5mm motáno na průměr tyčky 4mm (vrták). Cívka je roztažená tak jek je vidět na fotce C1 a C2 je 8,2pF. Zpětná vazba u LNA není vyhodil jsem ji není tam potřeba, domnívám se že zvyšuje šumové číslo a snižuje zisk asi o 1dB. Trim tam taky nedávám je tam odpor 45 Ohm a celkový proud celým | + | |
====== The measured parameters ====== | ====== The measured parameters ====== | ||
- | {{:cs:prenos.png?200|}} | + | {{:cs:rf:lna01a.png?400|Transmission characteristic of LNA01A preamplifier.}} |
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===== Covering ===== | ===== Covering ===== | ||
- | The module fits into __metallic tin shielding | + | The module fits into metallic |
en/lna.1374698855.txt.gz · Last modified: 2013/07/24 20:47 (external edit)