SV: [AMPS] abnormallly high plate current

[Mikael Westerlund]

If all figures is true you should se the anod changing colour very fast! Even smelling the hot stuff!
I mean 1400w input and 500w output on a single 3-500z sounds as you need a hell of a fan to me.

Mike SM3JLA

----- Ursprungligt meddelande ----- 
Från: Lane Zeitler <Ku7i@worldnet.att.net>
Till: <amps@contesting.com>; <boatanchors@listserv.tempe.gov>
Skickat: den 6 januari 2000 03:58
Ämne: [AMPS] abnormallly high plate current


> 
> Gents,
> For some reason I am getting higher than normal plate current in a single
> 3-500Z amp. On 160 meters with 400mA of Ip and 3500 volts under load the amp
> is only delivering 500 watts of output.
> 
> On 80, the Ip is 400mA with 3500 volts on the anode and the output power is
> only 600 watts.
> 
> Seems that the efficiency is way way down. The other bands are similar to
> this. With 3500 volts on the plate at 400ma I would expect at least 850
> watts out if getting around 60% efficiency.
> 
> What would cause this? The values of the pi output network C1, L, and C2 are
> very very close to what the formulas say they should be. I wonder if my
> plate choke is absorbing some of the power? Something is definately not
> right.
> 
> Lane
> Ku7i
> 
> 
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> 


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