[Moon-net] $CX250B question

Sat May 24 22:02:07 CDT 2008

Typical performance here for 250B's in the good days was 1000W with up to 1150w out, and 900w with 150's

Voltages B+ n/l 2700V  Load 2450v, screen 300v, Ip 25ma idle, ~ 600 ma and Lots of air!

Maybe a little more voltage!

73 Tommy

<html><DIV><P>&nbsp;</P></DIV></html>> From: lz1bb at mail.bg> To: tloebl at verizon.net> Date: Sun, 25 May 2008 00:30:33 +0300> CC: moon-net at list-serv.davidv.net> Subject: Re: [Moon-net] $CX250B question> > Yes I have purple 4cx250 made by Eimac, so there are purple tubes. But> without lable it is not prove for you that you have actuaqlly these> tubes in hand. Accorrding the power level with your elder tubes. It is> more likely you had 4cx300 or russian gu70. The other possibility id to> exchange the tubes with old ones. It is very obvious which tube has been> in service and which one is brand new. Unfortunately after 24 hour> filament treatment the difference is no more seen. So I could not put> exact diagnose what has been happening from your explanations only.> > 73, Harry LZ1BB> .> On Sat, 2008-05-24 at 14:54 -0400, tom wrote:> > Does anyone know if 4CX250B tubes were made with purple ceramic instead of white, or is the purple version a different tube? The writing on the tube has been removed.> > > > Tom > > _______________________________________________> > Moon-Net posting and subscription instructions are at http://www.nlsa.com/nets/moon-net-help.html> > > > > > > _______________________________________________> Moon-Net posting and subscription instructions are at http://www.nlsa.com/nets/moon-net-help.html> 
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