[BC] Listeners Loading down the Transmitter: WAS Listening inthecar

[seaberg1@sbcglobal.net]

I think the farmer hauled another load away !!

Bob -- W3MDM

----- Original Message ----- 
From: "Thomas G. Osenkowsky" <tosenkowsky at prodigy.net>
To: "Broadcasters' Mailing List" <broadcast at radiolists.net>
Sent: Tuesday, August 08, 2006 3:04 PM
Subject: Re: [BC] Listeners Loading down the Transmitter: WAS Listening 
inthecar


>> That reminds me of "The Negative Frequency Effect"  If you reverse the TX
> crystal in its holder you generate negative frequency.
>
> Remember when the FCC clarified the definition of "Carrier Shift" to
> "Carrier Amplitude Regulation"? "The Negative Frequency Effect"  is
> defined as "Carrier Frequency Regulation". One of the primary
> causes of negative frequency shift is poor oscillator power supply
> regulation. It is recommended to use Monster brand deoxygenated
> cabling in the RF oscillator power supply. This is also true for the
> 19 kHz pilot oscillator in stereo generators. Poor pilot frequency
> regulation results in poor stereo imaging, and center channel buildup.
> As the transmitter draws more current under modulation, the supply
> voltage can sag and cause the above ill effects. Low loss cabling reduces
> the I2R losses and promotes improved supply voltage stability and
> ripple frequency regulation.
>
> You can also place an 8 ohm to 1 to 10k ohm transformer across a
> speaker (low-Z towards speaker) and use the speaker as a microphone.
>
> Tom Osenkowsky, CPBE
>
>
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