On Thu, 18 Feb 2016 00:08:51 -0500, "Mr. Luddite"
wrote:

We are saying the same thing. I just left out the the 455Khz
intermediate freq for simplicity. The BFO (controlled by your tuning
dial or pushbutton) is tuned to the carrier freq however, as I recall
and not to the fixed, IF frequency. If that were the case you couldn't
select any particular broadcast frequency.

===

It's a matter of standard terminology.

The local oscilator (LO) is what allows you to select stations by
frequency. The BFO is specialized for CW and SSB reception and many
(most) radios do not have a BFO.

https://en.wikipedia.org/wiki/File:Superheterodyne_receiver_block_diagram_2.svg

https://en.wikipedia.org/wiki/Beat_frequency_oscillator

On Thu, 18 Feb 2016 01:04:50 -0500,
wrote:

On Thu, 18 Feb 2016 00:08:51 -0500, "Mr. Luddite"
wrote:

We are saying the same thing. I just left out the the 455Khz
intermediate freq for simplicity. The BFO (controlled by your tuning
dial or pushbutton) is tuned to the carrier freq however, as I recall
and not to the fixed, IF frequency. If that were the case you couldn't
select any particular broadcast frequency.

===

It's a matter of standard terminology.

The local oscilator (LO) is what allows you to select stations by
frequency. The BFO is specialized for CW and SSB reception and many
(most) radios do not have a BFO.

https://en.wikipedia.org/wiki/File:Superheterodyne_receiver_block_diagram_2.svg

https://en.wikipedia.org/wiki/Beat_frequency_oscillator

Where does the cats whisker fit in there? ;-)

On Thu, 18 Feb 2016 02:27:53 -0500, wrote:

On Thu, 18 Feb 2016 01:04:50 -0500,
wrote:

On Thu, 18 Feb 2016 00:08:51 -0500, "Mr. Luddite"
wrote:

We are saying the same thing. I just left out the the 455Khz
intermediate freq for simplicity. The BFO (controlled by your tuning
dial or pushbutton) is tuned to the carrier freq however, as I recall
and not to the fixed, IF frequency. If that were the case you couldn't
select any particular broadcast frequency.

===

It's a matter of standard terminology.

The local oscilator (LO) is what allows you to select stations by
frequency. The BFO is specialized for CW and SSB reception and many
(most) radios do not have a BFO.

https://en.wikipedia.org/wiki/File:Superheterodyne_receiver_block_diagram_2.svg

https://en.wikipedia.org/wiki/Beat_frequency_oscillator

Where does the cats whisker fit in there? ;-)


===

That's easy, the cats whisker is basically a semiconductor diode that
demodulates the AM signal. Of course the availability of vacuum tube
diodes and packaged semiconductors made the "whisker" obsolete. :-)

On Thu, 18 Feb 2016 09:51:14 -0500,
wrote:


Where does the cats whisker fit in there? ;-)


===

That's easy, the cats whisker is basically a semiconductor diode that
demodulates the AM signal. Of course the availability of vacuum tube
diodes and packaged semiconductors made the "whisker" obsolete. :-)

I was just screwing with you guys. I did make a very simple radio when
I was a kid using the brand new germanium diode for the detector.
There really wasn't much to it since it was basically the old crystal
set design.
The next radio I made was a 3 tube deal that was one of the projects
in a 12 week (by mail) electronics course I took. You got a box of
parts every week and a new project building on what you did the week
before along with a bunch of training material and a self checked
quiz.
It was pretty good training for a kid and the radio worked pretty well
for what it was. It got me interested in DXing