[BULK] - Re: [Amps] Looking for a design for a single 4cx250b tube on50 Mhz-six meters.

[Steve Katz]

3200v on a 4CX250 is kind of scary....usually you need a ~ 5:1 ratio of
plate to screen voltage for linear operation with this series, and that
would be ~600v on the screens.  Yikes!  -WB2WIK/6

"Nobody needs more than 640k!" -Bill Gates, 1982

> -----Original Message-----
> From:	R.Measures [SMTP:r at somis.org]
> Sent:	Tuesday, October 12, 2004 2:35 PM
> To:	George
> Cc:	amps at contesting.com; Chris Pedder
> Subject:	[BULK] - Re: [Amps] Looking for a design for a single
> 4cx250b tube on50	Mhz-six meters.
> 
> 
> On Oct 12, 2004, at 2:15 PM, George wrote:
> 
> > In about 1965 I ran a pair of 4CX250R's at 3200 VDC and proved to a 
> > friend
> > of mine that they would put out 750 to 800 watts on 6 meters.
> 
> George -- How much screen V?
> 
>  >
> >  They got hot
> > on long transmissions ..,in fact, the plate leads unsoldered and I had 
> > to
> > clamp them.  This was the time you could buy these rugged ceramics for 
> > 1.00
> > each in the L.A., CA military surplus market. Didn't care if they 
> > croaked,
> > as they were cheap.
> >
> > Regards,
> > George W7LFD...ex W6BFJ
> >
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> 
> Richard L. Measures, AG6K, 805.386.3734.  www.somis.org
> 
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