Introduction to the Superhetrodyne Receiver

1/17/2011 2:12:31 PMLook It Up

This is an example of data that is freely available on the net. There is almost no topic that you can search for without finding real information, often from university sites. A little self study will go a long way towards gaining a real understanding of topics that interest you. Have fun all.

http://users.tpg.com.au/ldbutler/Superhet.htm

1/17/2011 2:38:02 PMTerry Decker

:This is an example of data that is freely available on the net. There is almost no topic that you can search for without finding real information, often from university sites. A little self study will go a long way towards gaining a real understanding of topics that interest you. Have fun all.
:
:http://users.tpg.com.au/ldbutler/Superhet.htm
:
An EXCELLENT site. Check out the comment at the very end about whether Armstrong had the first patent on the circuit. Very interesting.
Terry

1/17/2011 5:22:17 PMWalter

I have read the biography 'Edwin Armstrong: Man of High Fidelity' and watched the video 'Empire of the Air'.
Major Armstrong had to go up against Lee DeForest and General Sarnoff of RCA to try and protect his breakthroughs. They had more lawyers.
It is grossly unfair what happend to this great man.

1/17/2011 5:48:07 PMTerry Decker

: I have read the biography 'Edwin Armstrong: Man of High Fidelity' and watched the video 'Empire of the Air'.
: Major Armstrong had to go up against Lee DeForest and General Sarnoff of RCA to try and protect his breakthroughs. They had more lawyers.
: It is grossly unfair what happend to this great man.
:
Yeah, he's one of my favorite people, along with Philo T. Farnsworth. The only person Sarnoff ever paid licensing fees to.
Sarnoff supported Armstrong, then pulled the rug out from under him. He also successfully locked him out of the allocation of FM bands for TV sound.
Nobody really knows why Armstrong put on his overcoat and stepped out of a window, but Sarnoff is alleged to say, "I didn't kill him". Strange thing to say.
T.

1/17/2011 7:18:05 PMWalter

:: I have read the biography 'Edwin Armstrong: Man of High Fidelity' and watched the video 'Empire of the Air'.
:: Major Armstrong had to go up against Lee DeForest and General Sarnoff of RCA to try and protect his breakthroughs. They had more lawyers.
:: It is grossly unfair what happend to this great man.
::
:Yeah, he's one of my favorite people, along with Philo T. Farnsworth. The only person Sarnoff ever paid licensing fees to.
:Sarnoff supported Armstrong, then pulled the rug out from under him. He also successfully locked him out of the allocation of FM bands for TV sound.
:Nobody really knows why Armstrong put on his overcoat and stepped out of a window, but Sarnoff is alleged to say, "I didn't kill him". Strange thing to say.
:T.
:

I did see a PBS video 'Big Dream, Small Screen' on Philo Farnsworth and how he got the idea of using scanning lines to create a picture from noticing the furrows left from a plow in a potato field.
A transmitted picture of a dollar sign no larger than a postage stamp got him some hard fought financial backing from believers.
The delay in commercial television due to WWII kept him from seeing any real money come in from his invention.
I think that more people today are familiar with Vladimir Zworykin's name than the true electronic television's inventor, Farnsworth.

1/18/2011 12:34:58 AMMore TV Data

This site has a lot of good info on TV development. This link is about German TV in the 1930's.

http://www.earlytelevision.org/german_prewar.html

1/19/2011 6:42:21 PMEdd

Sirs y Mme Cindy . . oh . . Cindy . . . . .

This link . . . on the Superhet . . . not the TV one . . .as given must have been derived from someones old favorites . . . and has aged a bit since 2007-9 .
I was not getting any connections the several times . . . I tried . . . even checking in the wee hours. (au le Australia)

Hmmmmmm . . . . must be a pileup and overload on the 1200 baud modem waaaaay out in the outback, or a Koala has chewed across the Cat-5 cabling strung across the eucalyptus trees.

After further researching in ethereal things from the long gone past, I was initially able to retrieve it, but
with the dropping of the photo's / illustrations ? ? .

Then, I was finally able to locate the photos . . . . for what info they provided . . . and have placed it as a a " HOT ! LINK " for others that were also unable to see what this "whole thang" was about.It stops being Nostalgic, just about the time of the onset of the dual and triple conversion process coverage.

Ref:

> > > > < < <

73's de Edd

:This site has a lot of good info on TV development. This link is about German TV in the 1930's.
:
:http://www.earlytelevision.org/german_prewar.html
:

1/25/2011 2:17:47 AMCindy to Edd