RF Basic store 2-stage amplifier

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g4bbh
Posts: 73
Joined: Thu Mar 13, 2008 7:19 pm

RF Basic store 2-stage amplifier

Post by g4bbh » Tue Jan 29, 2013 6:48 pm

Whilst pottering around the Digilite project site at http://www.g8ajn.tv/dlhardware1.html I noticed a link for amplifiers to the RF Basic store on eBay. It took me to a designer kit for a 2-stage SOT-89 amplifier. I wonder if anyone has built one of these and if so which SOT-89 devices were used. I currently use one of their other boards with a single VNA25 as my first buffer after the Digilite followed by a small attenuator and then a DDK SPF5043 to drive a Mitsubishi brick. The idea of a single board two stage amp looks much neater - as long as it has enough linear headroom. The second stage needs a pretty high P1dB to remain linear enough for DATV.
Dick G4BBH

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