This is simply build a broadband antenna amplifier for a frequency range of 45-900 MHz.
Construction the amplifier with this way short possible wiring floating above the purchaser side of a piece printplaat.
Floating in a can housing is also possible. The amplifier must be built in entirely in a dense housing.
For in - and termination plugs are possible 75 ohm BNC - chassis shares are used.
If (minimum) a feeding tension of 18V is used must the capacitance of 820 ohm be reduced to 560 ohm.

Budget :

Prix indicatif : 15,00€.

• R1 = 390 ohm
• R2 = 330 ohm
• R3 = 3k9 ohm
• R4 = 820 of 560 ohm (see text)
• R5 = 15 ohm
• C1..C3 = 680pF céramic
• L1 = 4 convolutions 0,35 mm purchaser lake wire, spatie 1mm, within diameter 4mm
• L2, L3 = 5mH Self de choc (4 convolutions 0,25mm op een ferrietkraaltje)
• T1 = BFR96
• L1 = 4 convolutions 0.35 mm purchaser lake wire, spatie 1mm, within diameter 4mm

(Posted Hugo Welther on Monday 22 November 2004 23.21)

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