----- Original Message ----- From: "David Knepper" <[EMAIL PROTECTED]> To: "Collins Mail List" <[EMAIL PROTECTED]>; "Discussion of AM Radio" <amradio@mailman.qth.net> Sent: Sunday, January 02, 2005 11:42 AM Subject: [AMRadio] The Solution
> Today I found an open 20K/150 watt resistor (one of two screen dropping > resistors) that was open. > > Since the 4-400A's did not have screen voltage the high voltage soared which > may have caused the plate current meter to show negative current - too much > voltage floating around inside the meter. > > I did install the same meter in the 30K-1 and it reads perfectly, which > proves this theory that the excess voltage is causing some kind of corona > charge inside the meter or something to that effect. > > The P.A. amplifier (4-400A's) had no screeen voltage, thus, no R.F. output. > No wonder the R.F. current meter was not showing any R.F. current! > > I will install a new 20K screen dropping resistor and see what happens. I > just bet that this will solve my problem. > > Anyone with a dunce cap, please send it to me. > > Thanks for all the suggestions that I received. You guys are super-smart > and were on the right track. > > More later on this matter once I install the new resistor. Let's hope that > this solves this vexing problem. > > Dave, W3ST > Publisher of the Collins Journal > Secretary to the Collins Radio Association > www.collinsra.com > Nets: 3805 Khz, Monday/Wednesdays 8 PM EDST > 14250 Khz Saturday, 12 Noon EDST > > > ______________________________________________________________ > AMRadio mailing list > Home: http://mailman.qth.net/mailman/listinfo/amradio > Help: http://mailman.qth.net/mmfaq.html > Post: mailto:AMRadio@mailman.qth.net > > > > _____________________________________________________ > This message scanned for viruses by CoreComm >
