Homebrew MC1350P based SSB Rig - #6 IF Amps, Part 2

[@FariborzSadeghivafa]

Hello, very useful and beautiful video. I looked in the datasheet and found an admittance of 0.36 for the input, but I did not find an admittance of 4.4 for 9 MHz for the output. Please explain further. Thanks

[@raafatalheety826]

Good design 73 from iraq

[@CharlieMorrisZL2CTM]

Thanks. It seems to work well for a venerable amp.

[@raafatalheety826]

@@CharlieMorrisZL2CTM of course

[@aleweber]

Hi Charlie! Why do you choose 500ohms as crystal ladder filter? Most designs uses some value between 150 and 250 ohms. I dont say its wrong, I am just curious! Thanks

[@CharlieMorrisZL2CTM]

Hi Alejandro. That particular crystal filter is 500 ohms.
Charlie

[@SpeccyMan]

pinMode(pin, INPUT_PULLUP); alleviates the need for a specific digitalWrite(pin, HIGH); to enable the pullups.

[@CharlieMorrisZL2CTM]

Thanks Nick. I was not aware of that. I suspect the compiler uses the same underlying code for both commands. I'll update my code.
Charlie

[@SpeccyMan]

@@CharlieMorrisZL2CTM Incidentally Charlie, Jason has some comprehensive notes on his Github explaining the differences between the library versions. I believe the correction factor is now a third parameter to the init routine.
Enjoying the series, keep up the great work.

[@CharlieMorrisZL2CTM]

@@SpeccyMan Cheers Nick. That's good to know thanks.