What is needed is the anode current required for these big claims of QRO on
the 500Z. This will give us an idea of how many tubes you are going through,
and how often!
(((73)))
Phil, K5PC
> -----Original Message-----
> From: amps-bounces@contesting.com [mailto:amps-bounces@contesting.com] On
> Behalf Of Joe Isabella
> Sent: Tuesday, August 09, 2005 10:46 AM
> To: Amps
> Subject: Re: [Amps] 2 X 3-500Z's and Plate Voltage Choice
>
> Steve,
> That's what my Henry runs (4kV SSB/3kV CW, no load). Under load, it drops
> to something like 2800 & 3700.
>
> And I've seen over 2k with just over 100W input. I now have a rig that
> will drive it with 150W, but I have yet to try it. I can send you some
> pics of the amp's HV meter & RF Applications VFD power meter, if you like.
> I have no doubts that the tube is good for 1kW each (ask Ameritron about
> their AL-80B).
>
> Joe, N3JI
>
> sccook1@cox.net wrote:
> Morning all,
>
> Was thinking about upgrading my Henry 2K-4 to a 4A configuration with the
> CW/SSB switch. Was also thinking about puting in a transformer with two
> secondary voltages. I have seen amps running a pair of 3-500Zs with all
> kind of plate voltage schemes -- some running CW plate voltage as low as
> 2100 V no-load and as high as 4KV for SSB no-load.
>
> What would be a suitable voltage to shoot for for CW and SSB? 3000/4000?
> Less / More?
>
> Your thoughts?
>
> Steve (WG7K)
>
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