Thought that was interesting. 5% tolerances on the inductors and the capacitors. I need to do monte carlo to see what drift will look like. I put 100 as a capacitor Q. Not sure. You can buy inductors that have a Q of something like 400 in those sizes.
100 passes 10% component tolerance.
*this is with uniform Q I don't think it changes during the simulation iterations, you would need to remake the schematic in a diff program to do it
Wanted to see what it would look like with garbage parts.
With Inductor Q of 120 and Capacitor Q of 1000 (not sure how optimistic or pessimistic this is, I read a quality one will have something like 10,000 at these frequencies)
Do you think that is reasonable for a preselector band?
I figured I could wind all the coils using air coils, on a strip of copper, then test with torroids. It should work nicely with my VNA because its 50 ohms and I can put BNC sockets on it so its not some hodge podge alligator clip shit
If you want the 40dB in 500KHz,
I thought 40dB to be reasonable in order to prevent gain compression and mixing. That is what the commercial instrument is specified to.
Given the cost of these things is low (Though I don't know about the switch), it would seem like a better idea to have two filter sets that are spaced differently rather then trying for higher orders , then switch between them to see what happens?
If you set a tighter pass band and lower block band you can get ugly shit
I do think you would need variable inductors to tune this thing though....
Seems OK with 1% tolerances and 1% monte carlo though. my waste of time experimentation will tell
Anyone wanna place bets on the highest order I can decently replicate?