Re: [TCML] Wanted (6) 8020 Vacuum tubes

[HomerLea@xxxxxxx]

Not only bullet proof (electronic wise); 8020s look 1000 times better than 
diodes and add pizzaz to the project.
Jim

> Subj: Re: [TCML] Wanted (6) 8020 Vacuum tubes 
>  Date: 11/17/2007 12:47:18 PM Pacific Standard Time
>  From: evp@xxxxxxxxxxx
>  Reply-to: tesla@xxxxxxxxxx
>  To: tesla@xxxxxxxxxx
> 
> Jim Mora wrote:
> 
> >Hello All,
> >
> >I am looking for (6) high conductance 8020 HV rectifier tubes and maybe a
> >spare, at reasonable pricing. New old stock would be great! Otherwise, I
> >would probably want to test them for near = conduction. This is for my 3P 6
> >pulse radar transformer for a stiff DCHV PS.
> >
> >Otherwise, I will use a stack of 6 each 7500v 4a puck diodes (which I
> >already have) in place of the tubes - just about the right height. The
> >output has a 150 H reactor in the tank! Will any RF get past this back into
> >the diodes?
> >
> >Thanks,
> >Jim Mora
> >
>   Why not just use the diodes?  Of course if you have the sockets and 
> more importantly the filament transformer that's a bullet prooof way to 
> go.  As for the reactor, I wouldn't depend on it to keep "any RF" from 
> getting through as it will have some distributed capacitance which WILL 
> result in feed through.  Good RF bypassing after an RF choke would be 
> advisable, with the cutoff frequency way below your intended operating 
> frequency.
> 
> Ed
> 




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