Re: VTTC grid leak

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "robert heidlebaugh" <rheidlebaugh-at-desertgate-dot-com> 

When using a directly heated cathode tube you use a center tapped fill
transformer and put the cathode resistor in the center tap lead so fill
current dose not flow in the resistor.
    Robert   H
-- 


 > From: "Tesla list" <tesla-at-pupman-dot-com>
 > Date: Sat, 04 Sep 2004 09:30:35 -0600
 > To: tesla-at-pupman-dot-com
 > Subject: Re: VTTC grid leak
 > Resent-From: tesla-at-pupman-dot-com
 > Resent-Date: Sat, 4 Sep 2004 09:32:45 -0600
 >
 > Original poster: herwig.roscher-at-gmx.de
 >
 >
 > Bob (R.A.) Jones <a1accounting-at-bellsouth-dot-net> wrote:
 >
 >>> Unfortunately the cathode of the 4-125A is heated directly i.e.
 > the
 >>> filament current of 6.5 A ac would flow through the resistor as
 >>> well.
 >> Not if you put it in the ht return connection.
 >
 > Bob and Steve,
 >
 > This I meant with: "I will try to monitor the plate current instead."
 >
 >> For instance, the place where the negative lead of your HV supply
 >> connects to the cathode circuit. (this is often the centre tap of
 >> the filament transformer)
 >
 > Unfortunately the xformer has not CT.
 >
 > Cheers,
 >
 > Herwig
 >
 >
 >
 >
 >
 > ---------------------------------------
 > Greed is the root of all evil!
 > ---------------------------------------
 >
 >