[Boatanchors] Carbon Mic Rejuvination

[Bill Carns]

That last paragraph should have read:

There has to be "Conservation of energy" in any system ....which basically
says there is no free lunch.  If you do not apply external power - like in a
supply to an amplifier, then a passive element like a water valve, or a
passive modulator like a carbon mic, cannot have POWER gain.  

You can have voltage gain....like a transformer....  But no power gain.  If
you gain voltage, you lose current.

Bill

-----Original Message-----
From: boatanchors-bounces at mailman.qth.net
[mailto:boatanchors-bounces at mailman.qth.net] On Behalf Of Bill Carns
Sent: Saturday, March 16, 2013 12:44 PM
To: 'rbethman'; boatanchors at mailman.qth.net
Subject: Re: [Boatanchors] Carbon Mic Rejuvination

As a newcomer to the list, I hate to be argumentative, but no passive
element has Power Gain..  By definition, Power Gain is some expression of
Power Out divided by Power in where this number must be more than one, or
the db expression of same.

As a physicist, and electrical engineer, I can tell you that no passive
element has gain, because the laws of physics would be violated.

We all know that Pin = Pout in a line transformer for instance. (Less of
course any small losses)... But Pout cannot be more than Pin.

There has to be "Conservation of energy" in any system ....which basically
says there is no free lunch.  If you do not apply external power - like in a
supply to an amplifier, then a passive element like a water valve, or a
passive modulator like a carbon mic, cannot have gain.  

Sorry....just could not let that misunderstanding and misstatement pass
without comment.  Perhaps you are confusing "Force" for power...  They are
not the same.



Bill



-----Original Message-----
From: boatanchors-bounces at mailman.qth.net
[mailto:boatanchors-bounces at mailman.qth.net] On Behalf Of rbethman
Sent: Saturday, March 16, 2013 12:23 PM
To: boatanchors at mailman.qth.net
Subject: Re: [Boatanchors] Carbon Mic Rejuvination

Someone would have to demonstrate the "power gain" or modulation of a gate
valve.

Bob - N0DGN


On 3/16/2013 12:58 PM, J. Forster wrote:
> Richard,
>
> More correctly, carbon mikes are 'energy modulators'- they modulate 
> the flow of electrical energy in response to a mechanical input...
> very like a valve for water.
>
> They DO have power gain, as do valves for water or air.
>
> Best,
>
> -John
>

______________________________________________________________
Boatanchors mailing list
Home: http://mailman.qth.net/mailman/listinfo/boatanchors
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Boatanchors at mailman.qth.net

List Administrator: Duane Fischer, W8DBF
** For Assistance: dfischer at usol.com **


This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html


-----
No virus found in this message.
Checked by AVG - www.avg.com
Version: 10.0.1430 / Virus Database: 2641/5681 - Release Date: 03/16/13

______________________________________________________________
Boatanchors mailing list
Home: http://mailman.qth.net/mailman/listinfo/boatanchors
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Boatanchors at mailman.qth.net

List Administrator: Duane Fischer, W8DBF
** For Assistance: dfischer at usol.com **


This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html


-----
No virus found in this message.
Checked by AVG - www.avg.com
Version: 10.0.1430 / Virus Database: 2641/5681 - Release Date: 03/16/13