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SPANFI by OK1DFC

Real first stage of SPANFI amplifier - 10/04/2007

New design with two band-pass filters, 144 and 432 MHz switched by OMRON signal relay.

PCB board with amplifier and band pass filters

Amplifier, detector and programmable attenuator for 10 - 20 - 30 - 60 dB

AD 8307 detector

SPANFI including two ATT, one of them describe above, second one is for fine attenuation set up 1 - 2 - 4 - 8 - 16 - 32 - 64 dB

	View to front panel.
	View to rear panel.

Whole unit above 20/08/2007