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Dual gate mosfets were a godsend when building RF/IF mixers or preamps. Luckily I have a small stash as they're almost unobtanium and costly these days, but for
by squarefoot 8mo ago
Dual gate mosfets were a godsend when building RF/IF mixers or preamps. Luckily I have a small stash as they're almost unobtanium and costly these days, but for most uses such as mixers and preamps they can be swapped with a pair or normal jfets in a cascode configuration like this one: https://i.stack.imgur.com/6Nyhg.gif https://i.stack.imgur.com/6Nyhg.gif
- cbdevidal 8mo agoToday I learned you can build an entire freaking CPU out of 555s lol https://hackaday.com/2011/08/05/building-a-computer-out-of-555-chips/ https://hackaday.com/2011/08/05/building-a-computer-out-of-5...
- jacquesm 8mo ago> Dual gate mosfets were a godsend when building RF/IF mixers or preamps. exactly :) BF901 FTW.
- analog31 8mo agoCoincidentally, there were vacuum tubes with dual grids for mixer and AGC applications.
- buescher 8mo agoAnd there's someone with a stash of those too. Dual-gate mosfets are one of the ways you know something's been in the back catalog way too long.
- Zardoz84 8mo agoOmg... and thinking that my mother throws a huge stash of components like that. my father was an electrical engineer and ham radio. At least, I managed to save a stash of electronic valves and some analog equipment like an old oscilloscope that could be in a museum (I saw a similar model in a museum).