Questions tagged [superheterodyne]
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3
questions
12
votes
1answer
6k views
How is the IF for a superhet selected?
There seem to be almost as many choices for the intermediate frequency (IF) as there are superheterodyne receivers and transceivers out there. The ones I have come across are 455 kHz, 452 kHz, 1.6 MHz ...
3
votes
3answers
123 views
What causes an AF amplifier to make popping sounds in a superheterodyne receiver?
Recently I've made a simple single IF superheterodyne SSB receiver for 40 meter band. The schematic is available here [PDF]. VFO and BFO are based on Si5351, the AF amplifier is LM386. It works OK but ...
6
votes
3answers
115 views
What is a "direct sampling superheterodyne" receiver?
Browsing the specifications for the IC-7300, I noticed it says the receiver system is a "Direct Sampling Superheterodyne" with an IF of 36 kHz.
I was confused by this, since I thought "...
