Oh shucks, Gotta go back and take a math course again. Big difference between DC input and Approx. Output power. Pair of 813's rated and about 800 watts input in this old 60's handbook. So 750 watts in the advertisment is a good number and the 811A's would get it to 100% modulation or very close.
Must do the math correctly. I stand corrected. Craig, -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Craig C. Heaton Sent: Sunday, July 22, 2007 9:41 AM To: [EMAIL PROTECTED]; Discussion of AM Radio in the Amateur Service Subject: RE: [AMRadio] Re: Boatanchor in Salem Hi Bry, Pair of 813's at 1KW wouldn't be my first choice, but then again for amateur service, give it a try. I don't know........never built one. A pair of 4-250A's X 810's would be a fine first choice, or 4-400A's X 810's to really loaf along. Trying to 100% plate modulate a pair of 813's with a pair of 811's as modulators at 750 watts DC input to the finals? But,I'd consider looking at the toob specs as not to p*ss beat them, heard the other day some toobs aren't being made anymore. Then again, haven't looked under the hood of the transmitter in question and haven't a clue as to the modulation method. But back to the Sweet Home/Salem homebrew transmitter........still worth a lookie-see. And I don't have a nickel in it. Craig, -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Bry Carling Sent: Sunday, July 22, 2007 9:15 AM To: [email protected] Subject: Re: [AMRadio] Re: Boatanchor in Salem QST published a number of articles showing a pair of 813 tubes used as a 1KW input RF final, if I am not mistaken. ______________________________________________________________ AMRadio mailing list 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. ______________________________________________________________ AMRadio mailing list 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.
