I'm sure Gary know that the PTP requirement is 2 EP - he is just using references.
John, WA5BXO -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Geoff/W5OMR Sent: Wednesday, February 13, 2008 11:35 AM To: Discussion of AM Radio in the Amateur Service Subject: Re: [AMRadio] RE: Using a Ranger as a driver Gary Schafer wrote: > While it is true that for 100% modulation the modulation voltage must be > equal to the final plate voltage. No. Not equal to, but *twice* as much. 2*Ep > But it is also misleading to say that it is strictly a function of modulation voltage. > What other voltage is present at the plate (other than the DC supply voltage) if not for the AC voltage achieved by the modulator? High-level plate-modulation, we're talking about. > The modulation transformer secondary works into a certain load impedance > (resistance) supplied by the final plate circuit of the RF stage. While it > is true that the modulation voltage must match the final plate voltage (for > 100% modulation), 2*Ep. -- Driving your AM Rig without a scope, is like driving your car at night, without headlights. (K4KYV) -- 73 = Best Regards, -Geoff/W5OMR ______________________________________________________________ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/[email protected]/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:[email protected] To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body. ______________________________________________________________ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/[email protected]/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:[email protected] To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body.
