"Obviously there are a bunch of varactor diodes here." I think I like that line so much I'm going to start throwing it randomly into casual conversations. May I do so without attribution?
Fascinating. The isolation to get the needed very high stability. They are cancelling out the course frequency in the mixed output to avoid a difficult filtering? Thanks for this! Such weird construction for a commercial product.
All that talk and discussion about impedance, RF coupling and parasitic capacitance... gets swept away in an instant when you open up devices like this 😅
I think perhaps those coupling inductors are actually 10 pf caps. The inductive pickup wires are the leads. That's the least of your problems. Getting those transistors out is "difficult". I vaguely recall having a similar issue, requiring a Dremel. Test the snot out of them first, of course! 73's W3IHM
This generator looks home made with lots of point to point wiring and even a separate little bodge board. Almost like something a wizard would make in his laboratory. 🧙♂️🎛🎚
"Obviously there are a bunch of varactor diodes here." I think I like that line so much I'm going to start throwing it randomly into casual conversations. May I do so without attribution?
I enjoy this analysis of RF-magic.
Fascinating. The isolation to get the needed very high stability. They are cancelling out the course frequency in the mixed output to avoid a difficult filtering? Thanks for this! Such weird construction for a commercial product.
All that talk and discussion about impedance, RF coupling and parasitic capacitance... gets swept away in an instant when you open up devices like this 😅
The 2n5053 crosses to a NTE316, which is still available from Digikey.
I think perhaps those coupling inductors are actually 10 pf caps. The inductive pickup wires are the leads. That's the least of your problems. Getting those transistors out is "difficult". I vaguely recall having a similar issue, requiring a Dremel. Test the snot out of them first, of course! 73's W3IHM
Sometimes when I look at the old analog schematics, I'm starting to think that their creators were either genius or insane.
I was wondering what the production cost of these circuits back then would have been? Sure highly skilled workers was needed
Might be good to spend some time on the leveling part of that can.
Jeopardy Question: Micro surgery.
I paused the vid at
All that camera moving is frustrating!
This generator looks home made with lots of point to point wiring and even a separate little bodge board. Almost like something a wizard would make in his laboratory. 🧙♂️🎛🎚