Hi,
With all due respect to goeytex, reading datasheets only tell a part of the story. I suppose things were hammered into us so well in early 70s electronics classes
that its hard to visualize a receiver functioning without tuned circuits. Even the ft2000 yaesu I have which is supposed to use modern techniques, still is littered
with tuned circuits in the input stages, and some of the i.f. If you look at the cct of the input for some of these modern transceivers they use multiple varicap diode
tuned circuits. Yaesu even suggest that to improve reception, you can incorporate these micro tuned high q tuned circuits ahead of the radio.
Progress=obsolescence x confusion
john
I
With all due respect to goeytex, reading datasheets only tell a part of the story. I suppose things were hammered into us so well in early 70s electronics classes
that its hard to visualize a receiver functioning without tuned circuits. Even the ft2000 yaesu I have which is supposed to use modern techniques, still is littered
with tuned circuits in the input stages, and some of the i.f. If you look at the cct of the input for some of these modern transceivers they use multiple varicap diode
tuned circuits. Yaesu even suggest that to improve reception, you can incorporate these micro tuned high q tuned circuits ahead of the radio.
Progress=obsolescence x confusion
john
I