Correction: That shouldn't be I^2*R but I*R (2.7V across R625). Thanks to Renée for correcting that for me directly.
Thanks, Barry - N4BUQ ----- Original Message ----- > From: "n4buq" <[email protected]> > To: "Jacques Fortin" <[email protected]> > Cc: "R-390 Mailing List" <[email protected]> > Sent: Saturday, November 26, 2022 9:03:53 AM > Subject: Re: [R-390] R390 B+ Expected Tolerance > Given that, I should be seeing very close to 7mV (1000 ohms(2.7^2 mA)) across > R625 and 85V across each VR tube, correct? > > Thanks, > Barry - N4BUQ > > ----- Original Message ----- >> From: "Jacques Fortin" <[email protected]> > >> In the R-390 PS, the 5651s should run at 2.7mA and have 85 volts across each >> of them. >> The only valid way to test VR tubes is to test those using a DC supply, >> monitoring both the current thru and the voltage across. > >> > > 73, Jacques, VE2JFE in Montreal ______________________________________________________________ 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
