HF Receiver part #12: Time to Move to a Bigger Case

Scope creep alert!! Adding that new filter to my Amateur HF receiver has teased me into making a bunch of other modifications, including moving the entire inner workings into a new case.
To see the entire series on this receiver, go to this playlist:
• Simple HF Receiver
You can find Jim Forkin's (WA3TFS) designs that I referenced at this web site:
044640f.netsol...
No endorsement is made nor implied to any commercial products referenced in this episode

[@technishn]

The Pin diode attenuator or Switchable attenuator matrix may actually have degraded Intermod performance at HF and some are specified at 100 MHz and above. The use of switched resistive attenuators are a good option.

[@jbatlanta]

How do you learn to do all this? Books? Formal training? I am ignorant of it all, but admire highly.
Would love to learn.