Radio Theory and design

This has some high math in it but I found the pictures interesting;). Designing MOSFET amps I made a model for the 2SK669 and tried it ou...

First let's take a look at a commercial kit. This is a converter to use with a car radio. Now much to look at with the IC containing ...

I gathered a little data on the cores. Just excerpts from the manufacturer's catalog. This could help with selecting a core material ...

The datasheet shows the LO level at 7dbm for the DBM and it shows the effect if the Lo is weak. As you can see higher LO signal is better...

So the question is What level is the DBM designed for and/or how does the design define that level? So we go with  ...

I started to title this on 'the solid state transformer'. Anyhoo, how much gain can we get from the MOSFET? The simulation show 1mV...

I don't have a lab and my test are more trial and error so I can't confirm or deny the chatter I hear on the boards. The subject at ...