George Smart - M1GEO

An online scrapbook full of half-baked projects and silly ideas.

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Category: Construction

Comparing Preamps

A couple of evenings this past week, I have stayed late at work to compare masthead pre-amplifiers. I have been able to measure their gain using the Rigol DSA-815TG we have at home. But only recently have I been able to measure the preamp noise figure. During the RSGB Convention 2017, I was chatting to […]

BA5SBA RTL-SDR Kit

A few weeks ago I ordered a BA5SBA RTL-SDR direct sampling kit from BangGood (link here). When it arrived, I decided to put it together. The kit includes everything needed, an RTL-SDR dongle, case, PCB, enamelled wire and so on. I worked from numerous build instructions (here, here, here and here), following the clearest description of each […]

1kW 144MHz Amp Pallet

Those of you who have been following this project evolve will have seen how I soldered the transistor to the heat-spreader and before that how I machined the heat-spreader & heat-sink after their initial use. Most recently, I have been building the new W6PQL pallet, based on the revision 4d schematic, found here. This pallet offered […]

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