Well, the link below is for the first R-390/URR manual known. This is a first "raw" version I put online on Feb. 2021. A better (restored) version is available for download here: https://www.royalsignals.org.uk/radio-rx-R390/2460.pdf
73, Jacques, VE2JFE in Montreal -----Message d'origine----- De : [email protected] <[email protected]> De la part de Jim Whartenby via R-390 Envoyé : 11 octobre 2024 21:57 À : R-390 Mailing List <[email protected]> Objet : Re: [R-390] Setting GAIN ADJ https://bama.edebris.com/download/military/r390/Collins_R390_1953.pdf Logic: Method used to arrive at the wrong conclusion, with confidence. Murphy On Friday, October 11, 2024 at 06:16:31 PM CDT, Barry Scott <[email protected]> wrote: Looking at the older (1955) vs newer (1962) manuals for the R-390/URR, the older one describes setting the GAIN ADJ pot using input directly into the IF deck; whereas the newer one describes setting it using the antenna input jack. Is one method any better or preferred to the other? One of the reasons I'm asking is that when I try the direct input to the IF deck method, I can't get -0,7V on the Diode Load which makes me think I have a gain problem in the IF deck. I know there were several posts about this over the years but I've lost track of those for the most part so I thought I'd ask. Thanks, Barry - N4BUQ ______________________________________________________________ R-390 mailing list Home: http://mailman.qth.net/mailman/listinfo/r-390 Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html ______________________________________________________________ R-390 mailing list Home: http://mailman.qth.net/mailman/listinfo/r-390 Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html ______________________________________________________________ R-390 mailing list Home: http://mailman.qth.net/mailman/listinfo/r-390 Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
