Hummmm, How many 811a's in that amp? If 4, then I think the 811a has 65 watts of plate dissipation, 4x65=260. Cut 260 watts in half for 130 watts of carrier output, but I doubt I would run them that hard. The power supply likely wont take that much abuse, its designed for ssb service, very low duty cycle!
Figure maybe 100 watts out, but watch things closely. You could likely pop in 572b tubes, 160 watts of plate dissipation, for a total of 640 watts of dissipation, 320 watts carrier output, but the amp would never support that, the power supply will just laugh at you. Four 811a's in plate modulated service at 1500 volts would give you 500 watts of carrier out all day long. Two 811a's in push pull class C do 250 to 300 watts of carrier...... Going from 25 to 100 watts is a help, but be careful with the amp.... Brett N2DTS -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Ralph Daniels Sent: Monday, November 22, 2004 7:55 AM To: amradio@mailman.qth.net Subject: [AMRadio] AM Usage with Linear AMPS Hi all, I feel this subject must have been covered many times but I just can't find it. Specifically, I have a Heathkit HX-10 Marauder driving an Ameritron AL-811H on CW and SSB and would also like to try it on AM. The driving power on AM is 25 watts. Is this a correct use of the amplifuer and if so what are some operationa guidelines as regards i/p and o/p power, duty cycle, cooling etc. Thanks in advance, Ralph Daniels, N1SK ______________________________________________________________ AMRadio mailing list Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net
