general questions

[Jamie]

Bob Masta wrote:

On Mon, 05 Nov 2007 16:16:08 -0800, Sean McIlroy
sean_mcilroy@yahoo.com> wrote:


two questions:

*) where can one read proofs of circuit-theoretic theorems (Thevenin,
Superposition, etc)?

*) can an fm receiver be substantially simplified (ie: simplified to
the point where even a chucklehead like me can eventually comprehend
it) if the thing is designed to receive only a single station?



I seem to recall some really simple FM receiver circuits using
tunnel diodes, back in the '60s and '70s. Then tunnel diodes
vanished from the face of the earth, apparently sucked up by
alien space ships. I guess they were afraid that if humans
ever figured out how tunnel diodes really worked, we'd be
able to challenge their galactic supremacy...

Best regards,


Bob Masta

DAQARTA v3.50
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www.daqarta.com
Scope, Spectrum, Spectrogram, FREE Signal Generator
Science with your sound card!
Close!, They didn't want us getting into their cable network and getting

free Alien Cable shows!


--
"I'm never wrong, once i thought i was, but was mistaken"
Real Programmers Do things like this.
http://webpages.charter.net/jamie_5

 

[Brendan Gillatt]

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Hash: SHA1

Sean McIlroy wrote:

*) can an fm receiver be substantially simplified (ie: simplified to
the point where even a chucklehead like me can eventually comprehend
it) if the thing is designed to receive only a single station?

I once read a Phrack article introducing the basics of RF recievers (FM
and AM), though I can't remember the issue. Check the archives at
http://www.phrack.org/archives.


- --
Brendan Gillatt
brendan {at} brendangillatt {dot} co {dot} uk
http://www.brendangillatt.co.uk
PGP Key: http://pgp.mit.edu:11371/pks/lookup?op=get&search=0xBACD7433
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[Michael Black]

Bob Masta (NoSpam@daqarta.com) writes:

On Mon, 05 Nov 2007 16:16:08 -0800, Sean McIlroy
sean_mcilroy@yahoo.com> wrote:

two questions:

*) where can one read proofs of circuit-theoretic theorems (Thevenin,
Superposition, etc)?

*) can an fm receiver be substantially simplified (ie: simplified to
the point where even a chucklehead like me can eventually comprehend
it) if the thing is designed to receive only a single station?


I seem to recall some really simple FM receiver circuits using
tunnel diodes, back in the '60s and '70s. Then tunnel diodes
vanished from the face of the earth, apparently sucked up by
alien space ships. I guess they were afraid that if humans
ever figured out how tunnel diodes really worked, we'd be
able to challenge their galactic supremacy...

But that tunnel diode didn't do anything magic. The design that

comes immediately to mind was the one in the GE semiconductor book,
where the tunnel diode was a converter stage down to a very low IF,
where a pulse counting detector sat. Even if the thing you remember
used the tunnel diode in some other capacity, chances are really good
that all kind of other devices could be used for the same purpose.

The previous question seems to be about understanding the circuit,
not finding a simple circuit to build. Two different things. A block
diagram is far better for understanding, because then the basics
can be introduced, without the "clutter" of all those parts or
the "clutter" of what amounts to minor variations from specific design
to specific design. Looking at specific designs will only sidetrack
things, "well why does this one use that tube and that one another tube?"
when really one needs to see the common points first to interpret
the rest.

That GE tunnel diode receiver is no different from the average FM
broadcast receiver, if you use a simple enough set of block diagrams.
Understand the conversion process, and why it is done, and then the
concept of an IF strip, and then a bit about FM demodulation, and
then that can be applied to that simple GE tunnel diode receiver or
that fancy stereo receiver. When you understand what is suppoed
to happen in an FM receiver, then it helps to interpret a specific
design.

Michael

 

[Bob Masta]

On Mon, 05 Nov 2007 16:16:08 -0800, Sean McIlroy
<sean_mcilroy@yahoo.com> wrote:

two questions:

*) where can one read proofs of circuit-theoretic theorems (Thevenin,
Superposition, etc)?

*) can an fm receiver be substantially simplified (ie: simplified to
the point where even a chucklehead like me can eventually comprehend
it) if the thing is designed to receive only a single station?

I seem to recall some really simple FM receiver circuits using
tunnel diodes, back in the '60s and '70s. Then tunnel diodes
vanished from the face of the earth, apparently sucked up by
alien space ships. I guess they were afraid that if humans
ever figured out how tunnel diodes really worked, we'd be
able to challenge their galactic supremacy...

Best regards,


Bob Masta

DAQARTA v3.50
Data AcQuisition And Real-Time Analysis
www.daqarta.com
Scope, Spectrum, Spectrogram, FREE Signal Generator
Science with your sound card!

 

[Tom Biasi]

"Sean McIlroy" <sean_mcilroy@yahoo.com> wrote in message
news:1194308168.128449.66110@i38g2000prf.googlegroups.com...

two questions:

*) where can one read proofs of circuit-theoretic theorems (Thevenin,
Superposition, etc)?

I just typed "thevenin proof" in Google and got pages of good info.

*) can an fm receiver be substantially simplified (ie: simplified to
the point where even a chucklehead like me can eventually comprehend
it) if the thing is designed to receive only a single station?

Not sure without knowing the level of your chuckleheadedness.

thanks,
stm

ps: a paper on my webpage (http://www.geocities.com/sean_mcilroy)
summarizes what i've been able to puzzle out regarding the ac
differential equations. my fantasy is that someone will look at it and
be able to tell me what i'm missing (or where i'm simply out-to-lunch,
if such is the case)

peace,
stm

 

[Sean McIlroy]

two questions:

*) where can one read proofs of circuit-theoretic theorems (Thevenin,
Superposition, etc)?

*) can an fm receiver be substantially simplified (ie: simplified to
the point where even a chucklehead like me can eventually comprehend
it) if the thing is designed to receive only a single station?

thanks,
stm

ps: a paper on my webpage (http://www.geocities.com/sean_mcilroy)
summarizes what i've been able to puzzle out regarding the ac
differential equations. my fantasy is that someone will look at it and
be able to tell me what i'm missing (or where i'm simply out-to-lunch,
if such is the case)

peace,
stm