|[AMRadio] The Solution|
k0ng at inebraska.com
k0ng at inebraska.com
Sun Jan 2 20:42:01 EST 2005
Does not compute. More voltge does not mean less current!
(even on X-rays) k0ng.
Quoting Bill Ramsey <ka8wtk at raex.com>:
> ----- Original Message -----
> From: "David Knepper" <cra at floodcity.net>
> To: "Collins Mail List" <collins at mailman.qth.net>; "Discussion of AM Radio"
> <amradio at 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
> > may have caused the plate current meter to show negative current - too
> > 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.
> > 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
> > 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
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