RX up here at Green Bank Lester B Veenstra K1YCM MØYCM W8YCM 6Y6Y les...@veenstras.com
452 Stable Ln (HC84 RFD USPS Mail) Keyser WV 26726 -----Original Message----- From: Wes [mailto:w...@triconet.org] Sent: Wednesday, March 31, 2021 2:34 PM To: time-nuts@lists.febo.com Subject: [time-nuts] Re: The Collapse of Puerto Rico’s Iconic Telescope [April 5th, 2021 New Yorker] On 3/30/2021 4:33 PM, Lux, Jim wrote: > On 3/30/21 2:56 PM, Wes wrote: >> You would know better than I, but I was thinking of physical size; 100m v. >> 70m. >> >> Obviously a BIG difference in TX power. >> >> Wes > > > It's all about EIRP, baby. > > I know they're talking about half a megawatt for GB, but I don't see it > happening. They've spent so much time making it "radio quiet", putting a big > honkin transmitter there seems odd. Just think, a return loss from the feed > of -30dB (which is pretty good) is good fraction of a kilowatt. But AFAIK the system is bistatic (pseudo-monostatic) so there's no local receiver to be subjected to transmitter leakage. We worried about leakage in the pulse doppler radars I'm familiar with; AMRAAM and Phoenix missiles, but even they were bistatic for most of their flights, tracking off the aircraft fire control radar which had significantly higher ERP. Only when close to the targets did they go active. Wes _______________________________________________ time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send an email to time-nuts-le...@lists.febo.com To unsubscribe, go to and follow the instructions there. _______________________________________________ time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send an email to time-nuts-le...@lists.febo.com To unsubscribe, go to and follow the instructions there.
