[Amps] Anyone have extra set of good 3-500zs?

[chasm at texas.net]

Lee Buller wrote:
>  So, I am looking for two 3-500Zs.  Anyone sitting on some out
> there?  I can go to RF Parts (and will if need be) but just asking
> if someone might have some out there.
> 
> Lee - K0WA


Lee, let us know the best price you find out there.  they just keep 
increasing in price and I wish now that I had gone ahead and bought a 
set at the first of the year.  also, let us know what the Tube is made 
of.... ZGs or whatever and the brand.
guess I better get a set although I think that mine will last forever 
in that SB220  -- but you never know when THEY will stop making them.
btw, aren;t there pulls from CT Scan or MRI machines that are equivalent?

thanks
Chas  k5dam