[Boatanchors] Carbon Mic Rejuvination

[J. Forster]

Just as with any amplifier, a power supply is needed.

An audio amp makes DC from line; that DC is modulated by an 'energy
modulator' to control the output.

An RF amp makes DC from line; that DC is modulated by an 'energy
modulator' to control the output.

An hydraulic system makes high pressure water from line; that water is
modulated by an 'energy modulator' to control the flow.

You must draw the control surfaces (boundaries) in the same way in all cases.

-John

===============





> Bill,
>
> I agree completely!
>
> I was commenting on John's post.
>
> The only possible way to achieve "power gain" in an air or water system
> REQUIRES something in the system that "introduces" energy.
>
> It would have to have an increase in pressure or flow rate, i.e., a pump
> or compressor.
>
> Bob - N0DGN
>
> On 3/16/2013 1:44 PM, Bill Carns wrote:
>> 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
>>
>
> ______________________________________________________________
> 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
>
>