On Wed, 22 Apr 2009 10:54:07 +1000, "Phil Allison"
wrote:

"Tim Shoppa the ****head Troll "



NO, PHIL... You dumb****!

YOU are the ****HEAD and YOU are the STUPID ****ing TROLL!

On Tue, 21 Apr 2009 08:27:24 -0500 mikea wrote in
Message id: :

[...]

Killfile, Phil. Phil, killfile.

What took you so long?

On Apr 21, 10:03*pm, "Phil Allison" wrote:
** Only indicates an autistic lack of comprehension.
** You are autistically obsessed with imaginary flaws in the writing.
*** Mostly likely because you have gone quite insane.
** What a revolting, pompous narcissistic pig you are *- *Tim.
** *I was much too kind earlier ....
** Mere narcissism has just turned into full blown, autistic ego-mania.
** *Shoppa's self delusions have made him a legend in his own mind.
** *When all he really has become is " history ".

You forgot to add, Phil, that my mother was a hamster and my father
smelt of eldeberries.

Tim.

"Tim Shoppa = Autistic Troll "


The best Wikipedia articles are often filled with good checkable
references, but other times it sounds like they were written in a
foreign language and translated into English

** Only indicates an autistic lack of comprehension.


Just because a Wikipedia entry isn't well-written or sounds awkward

** You are autistically obsessed with imaginary flaws in the writing.

Most likely because you have gone quite insane.


Somewhere there's a bunch of people who spend their time correcting
and improving Wikipedia entries, and I think overall they are doing a
good job, but that doesn't mean the result is always devoted to my
interests.


** What a revolting, pompous narcissistic pig you are - Tim.


Just like anything else in this world, it's got workers and
it's got managers and they aren't always devoting their attention to
the little corners of arcania that I live in.


** I was much too kind earlier ....


It's not that the Encyclopedia Britannica is perfect either. I can
open it up to the very few subjects that I happen to be expert on and
find over-simplifications and a lack of cites to what I consider to be
the best references.

** Mere narcissism has just turned into full blown, autistic ego-mania.


Of course in academia I got real used to opening a journal and instead
of reading the articles, to go straight to the references and see if
they are quoting one of my articles :-).


** Shoppa's self delusions have made him a legend in his own mind.

When all he really has become is " history ".



...... Phil

On Wed, 22 Apr 2009 05:24:57 -0700 (PDT), Tim Shoppa
wrote:

On Apr 21, 10:03*pm, "Phil Allison" wrote:
** Only indicates an autistic lack of comprehension.
** You are autistically obsessed with imaginary flaws in the writing.
*** Mostly likely because you have gone quite insane.
** What a revolting, pompous narcissistic pig you are *- *Tim.
** *I was much too kind earlier ....
** Mere narcissism has just turned into full blown, autistic ego-mania.
** *Shoppa's self delusions have made him a legend in his own mind.
** *When all he really has become is " history ".

You forgot to add, Phil, that my mother was a hamster and my father
smelt of eldeberries.

Even when he was young?
--
John

Tim Shoppa wrote:
A terminology question I suppose about the derivation of the term
"Superheterodyne" more than anything else:

Does the "Super" actually mean anything? Is there a Subheterodyne?

Traditionally superhets mix a higher radio frequency down to a lower
IF frequency, but certainly in the past few decades radios with IF's
above the RF frequency have become very common in broadband
applications, and those are still called superhets, not subhets :-).

If it comes to that, old Longwave/Mediumwave superhet receivers
generated an IF for the LW band that was higher than the frequency of
the incoming signal. The IF was usually a frequency between the two bands.

Sylvia.

John Larkin wrote:
On Mon, 20 Apr 2009 09:50:05 -0700 (PDT), Tim Shoppa
wrote:

A terminology question I suppose about the derivation of the term
"Superheterodyne" more than anything else:

Does the "Super" actually mean anything? Is there a Subheterodyne?

Traditionally superhets mix a higher radio frequency down to a lower
IF frequency, but certainly in the past few decades radios with IF's
above the RF frequency have become very common in broadband
applications, and those are still called superhets, not subhets :-).

Google turns up a couple hits on subheterodyne but other than one that
might mean "IF higher in frequency than RF" I don't recognize what
they mean..

I suspect that "Super" was more a marketing term than anything
else :-).

Tim N3QE

Supersonic.

http://en.wikipedia.org/wiki/Superheterodyne_receiver


John


Not a bad article, except that he seems to think that cascading multiple
stages at a single IF improves image rejection, and that very high IFs
are much less common than double conversion. (Does *anyone* use double
conversion anymore? Spur city.)

--
Dr Philip C D Hobbs
Principal
ElectroOptical Innovations
55 Orchard Rd
Briarcliff Manor NY 10510
845-480-2058
hobbs at electrooptical dot net
http://electrooptical.net

On Thu, 23 Apr 2009 11:27:37 -0400, Phil Hobbs
wrote:

John Larkin wrote:
On Mon, 20 Apr 2009 09:50:05 -0700 (PDT), Tim Shoppa
wrote:

A terminology question I suppose about the derivation of the term
"Superheterodyne" more than anything else:

Does the "Super" actually mean anything? Is there a Subheterodyne?

Traditionally superhets mix a higher radio frequency down to a lower
IF frequency, but certainly in the past few decades radios with IF's
above the RF frequency have become very common in broadband
applications, and those are still called superhets, not subhets :-).

Google turns up a couple hits on subheterodyne but other than one that
might mean "IF higher in frequency than RF" I don't recognize what
they mean..

I suspect that "Super" was more a marketing term than anything
else :-).

Tim N3QE

Supersonic.

http://en.wikipedia.org/wiki/Superheterodyne_receiver


John


Not a bad article, except that he seems to think that cascading multiple
stages at a single IF improves image rejection, and that very high IFs
are much less common than double conversion. (Does *anyone* use double
conversion anymore? Spur city.)

I did a double-conversion superhet FSK receiver for Reuters, umm,
maybe 20 years ago. I used state-of-the-art MF10 filter chips. Just
after I did it, they dumped all their wireline FSK newsfeeeds for the
Internet. Pity, it was a neat design.

We may do it again soon, for a scientific instrument, more digital
this time.

John

Tim Shoppa wrote:
A terminology question I suppose about the derivation of the term
"Superheterodyne" more than anything else:

Does the "Super" actually mean anything? Is there a Subheterodyne?

Traditionally superhets mix a higher radio frequency down to a lower
IF frequency, but certainly in the past few decades radios with IF's
above the RF frequency have become very common in broadband
applications, and those are still called superhets, not subhets :-).

The IF frequency is above the signal frequency, hence the "super"
prefix.

There are also "homodyne" receivers, where the local oscillator is
at the same frequency as the received carrier. These convert the input signal
all the way down to the output signal in one step. This was an
early idea, but until phase locked loops were figured out, hard to make work.
It's used today in some microwave and optical systems.

John Nagle

Subheterodyne?? BFO???