Jesus Christ just had an argument in Tesco over some fucking tomatoes. I was congratulated on buying British tomatoes and that we’d be fine growing our own food like we did in the war. I replied so you’d welcome rationing and malnutrition and eating horses again? Got some diatribe, got called a traitor. Replied if I’m a traitor I’m proud of it. Hell is other people.
TEA related. Did a boo boo. When I bought the HP 33120A I sold my Rigol DG1022Z. Figured I’d not need two signal sources. What did I need yesterday? Two damn sources. One of which needed to be keyed. Fortunately only 600Hz required. So an hour in LTspice and some bob please style prototyping and it works! Nice clean sine. No Arduino or digital shit.
Keyed twin-t oscillator, buffer, shit attenuator, gain stage, push pull stage. Nice stable output impedance.
Lead lengths because (a) I don't care and (b) this is going to be rebuilt on a manhattan board later.
edit: you can see the scribblings where LTspice didn't match reality. Bob Pease was right about spice.