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Re: More Tube Data (was Re: 204 Tube Data)
How about a 4D21? That is a 4-125A tetrode with 120 watts plate dissipation.
It is half the dissipation of a 4-250A, smaller yet than a 4-400, etc. Fits
the same socket as the bigger two I just mentioned here. Good for 5 kV on the
plate. Fil 5.0v -at- 6.5 amps. Good to 125 MHz. suffix "A" upgraded to 175 watts
dissipation. We use 4 of these 4-125A tubes in parallel in a hard modulator
for a pulsed microwave power source.
Robert W. Stephens
Director
AREA31 Research Facility
<http://www.area31-dot-org>www.area31-dot-org
>
> ----- Original Message -----
> From: <mailto:tesla-at-pupman-dot-com>Tesla List
> To: <mailto:tesla-at-pupman-dot-com>tesla-at-pupman-dot-com
> Sent: Wednesday, February 16, 2000 19:11
> Subject: Re: More Tube Data (was Re: 204 Tube Data)
>
> Original Poster: "Malcolm Watts"
> <<mailto:malcolm.watts-at-wnp.ac.nz>malcolm.watts-at-wnp.ac.nz>
>
> Hi Ralph,
>
> > Original Poster: <mailto:Parpp807-at-aol-dot-com>Parpp807-at-aol-dot-com
> >
> > In a message dated 2/15/00 9:00:29 AM Central Standard Time,
> <mailto:tesla-at-pupman-dot-com>tesla-at-pupman-dot-com
> > writes:
> >
> > << post specs for a PL-2D41 made by Penta Laboratories (CA).
> > >>
> > Malcolm,
> >
> > I can find nothing for a 2D41.
> > Let's try a 2D21 / 5696
> > This is a gas operated tetrode relay tube
> >
> > Fil 6.3 V 0.6 A
> > Peak Anode 650 V
> > Peak inverse 1300 V
> > Peak cathode 0.5 A
> > Avg cathode 0.1 A
> > Surge current 10 A
> >
> > Typical op:
> > 400 V anode
> > 1 megohm grid resistor
> >
> > Pins:
> > 1 grid 1
> > 2 cath
> > 3-4 fil
> > 5-7 grid 2
> > 6 plate
> >
> > Hope this helps
> >
> > Happy day,
> > Ralph Zekelman
>
> Unfortunately it doesn't sorry. I am familiar with 2D21 and this is
> definitely not one of those. It is a transmitting tube - of that there can
> be no doubt. Anyone else? someone must know.
>
> Regards,
> Malcolm
>
>