acannan

I've recently been learning about superhet and frequency mixing and wanted to start tinkering. Specifically I'd like to try using two heterodynes in series to first frequency shift then uninvert the original audio, sort of like an analog frequency shifter.

To do this, I'd need a frequency mixer. I've been looking at a ring modulator (like https://upload.wikimedia.org/wikipedia/commons/1/1b/Diode_DBM.png) which should require 4 shottky diodes and 2 center-tapped transformers. I've had difficulty locating an affordable transformer, with good enough fidelity for audio, that also includes a center tap.

I have a few questions:

• Where can I locate affordable, good-enough-for-audio transformers?
• Is the ring mod approach good enough? I see there's also a gilbert cell.
• Any general advice for someone just starting a project like this?

Thanks!

Hi everyone,

I've got quite a long drive coming up and was interested in finding some audiobooks, which got me thinking, has anyone listened to (also, do they exist) any programming-centric audiobooks recently?

I figure podcasts might be the more popular format for technical content, but I'd be more interested in an audiobook if people know of any good ones.

I'm primarily a python developer if that helps narrow it down. Interested in LLMs, python core stuff, message brokers, databases, whatever!

Let me know if you have any leads!