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Re: Filament voltages
Original poster: "Sundog by way of Terry Fritz <twftesla-at-qwest-dot-net>" <sundog-at-timeship-dot-net>
Each tube wants 10v10A, so it's 400w total just idle. I used tubing
because it was handy. The NST core was originally a 12/30, so I'm pretty
badly abusing the primary, but I don't mind. After my hiatus (after the FL
'Thon), I'll probably get with a buddy and wind a filament tranny using
foil instead of wire. Pigs are wound using foil, and handle serious
current demmands, so that'll make it easier.
But now I know, I need to have the rated filament voltage *at* the tube.
At 12:03 AM 5/2/2002, you wrote:
>Original poster: "rheidlebaugh by way of Terry Fritz <twftesla-at-qwest-dot-net>"
>Dave: Am I reading correctly, 4 tubes with 10V 10 A fill. If so that is 10V
>40 Amps or 400 watt. I would not use under # 10 wire to avoid wire heating.
> Robert H
> > From: "Tesla list" <tesla-at-pupman-dot-com>
> > Date: Wed, 01 May 2002 08:01:27 -0600
> > To: tesla-at-pupman-dot-com
> > Subject: Re: Filament voltages
> > Resent-From: tesla-at-pupman-dot-com
> > Resent-Date: Wed, 1 May 2002 08:13:52 -0600
> > Original poster: "davep by way of Terry Fritz <twftesla-at-qwest-dot-net>"
> > <davep-at-quik-dot-com>
> > Tesla list wrote:
> >> Original poster: "sundog by way of Terry Fritz <twftesla-at-qwest-dot-net>"
> >> <sundog-at-timeship-dot-net>
> >> Hi Dave,
> >> The tranny for the Quad 833 is a separate tranny than the
> >> plate tranny. It's wound with 1/8" tubing on an old NST core.
> >> Unloaded I get 10.2v on it, loaded that drops to around 7v
> >> (pushing 4 tubes). Do I need to correct the fully-heated
> >> filament voltage to 10v, or let it sit at 7v?
> > I would certainly correct it. cf someone else's
> > quite thorough posting on the problems with
> > underpowering the filaments.
> > As to the wiring (another other post) I can't see
> > #8 for 10 Amps for short runs. #14 should be fine,
> > even #12 would be generous.
> > best
> > dwp