[Amps] RF Parts OEM 3-500ZG's

[Joe Isabella]

Maybe you should try it with **TWO** 3-500ZGs, like my Henry runs.  It will provide nearly 4kV at 1A with Peter Dahl upgrades.
 
Joe, N3JI

Gudguyham at aol.com wrote:
In a message dated 8/8/2005 8:05:24 A.M. Eastern Standard Time, r at somis.org writes:
I will NEVER pay twice as much for an Eimac 3-500Z.  I now have the 
> exact same tubes in a Henry 3K-A, and they take all the abuse I give 
> them and just keep making power.  I frequently run AM, and have had 
> them as red (orange?) as an electric range heating element on High.  
> Never had an inkling of a problem, and when I do finally run them over 
> the edge, I'll buy another set of RFP 3-500ZGs.  With 4kV on them, 
> they will easily exceed 2kW output with 100W.  I'm sure with more 
> drive they'
>  ll make
>  even more power,

3-500Zs typically begin to run out of emission above 420mA per each.

> but I typically drive it with 70-80W to keep it legal.

But of course, and we always drive at the speed limit on freeways.



I have owned MANY 3-500 type amps!!  Probably the Ameritron AL-82 runs the 3-500Z tube higher than most other amps using the 3-500.  Some Henry amps may slightly exceed the Ameritron, but not by much.  With an honest 100 watts to a bird dummy load and a bird wattmeter (read by 2 separate slugs in same meter) I have NEVER seen 2000 watts output from any type of 3-500 tube.  And certainly with no less than 100 watts for sure.


		
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