[Milsurplus] NOS ART-13

[Ken]

No.  Both of the two transmitters use FT-243s. In my experience, FT-243s start to chirp at currents around 40 mA. Neither of these transmitters chirp.As I remember it, one of the builders measured crystal current and it was below 40 mAKen W7EKBSent via the Samsung Galaxy S21 5G, an AT&T 5G smartphone
-------- Original message --------From: Hubert Miller <Kargo_cult at msn.com> Date: 8/6/24  17:31  (GMT-08:00) To: milsurplus at mailman.qth.net Subject: Re: [Milsurplus] NOS ART-13 Re single tube 813 transmitter:>A good friend of mine built and operated one of those. Walt Polete near Missoula,Montana. He loved it.150 watts input.  Crystal controlled. I have the original RCA-published article on my web site as a PDF.Another ham built one of those recently and operates it, mostly on 40. It sounds good too.>Ken W7EKBIt doesn't eat crystals? -Hue,  K7HUE ______________________________________________________________Milsurplus mailing listHome: http://mailman.qth.net/mailman/listinfo/milsurplusHelp: http://mailman.qth.net/mmfaq.htmPost: mailto:Milsurplus at mailman.qth.netThis list hosted by: http://www.qsl.netPlease help support this email list: http://www.qsl.net/donate.html
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