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Attenuatore a scatti.

Usa resistenze da ½ e da 1/4 di Watt,  quindi è da usare solo in RX o in QRP (TX max 5w).

E' composto da 6 (5) celle a pi greco con valori di 1, 2, 3, 5, 10 e 20 dB.

 

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http://iv3ogt.altervista.org/Homebrew/Attenuatore/

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ATTENUATORE   (schema originale)

Parts Inventory

R1 – 6.2 ohm, 2W, resistor (blue-red-gold-gold)

R4 – 12 ohm, 2W, resistor (brown-red-black-gold)

R7 – 18 ohm, 2W, resistor (brown-gray-black-gold)

R10 – 33 ohm, 2W, resistor (orange-orange-black-gold)

R17 & R18 – 68 ohm, 2W, resistor (blue-gray-black-gold)

R13 – 75 ohm, 2W, resistor (violet-green-black-gold)

R14 & R15 – 100 ohm, 2W, resistor (brown-black-brown-gold)

R11 & R12 – 200 ohm, 2W, resistor (red-black-brown-gold)

R16 – 270 ohm, 2W, resistor (red-violet-brown-gold)

R8 & R9 – 300 ohm, 2W, resistor (orange-black-brown-gold)

R5 & R6 – 470 ohm, 2W, resistor (yellow-violet-brown-gold)

R2 & R3 – 910 ohm, 2W, resistor (white-brown-brown-gold)

7 – DPDT slide switches

2 – BNC female chassis connectors

4 - 4-40 x 1/4" undercut Philips flat head screw

6 - 4-40 x 1/4" Philips head screw

4 – rubber feet

1 – decal set

1 – aluminum chassis

12” – Teflon hook-up wire 

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