Roger,
That is a good point. I have a Palstar AT5K and am aware of the
"more C and less L" but haven't been successful at finding more
than one setting for a match. I haven't really spent very much
time at it though. I think I will do some more testing and see what I
can do. I guess it would be good to crank the rotary inductor down to
a minimum inductance and start from there ?
Bob
K6UJ
On Mar 15, 2011, at 1:04 PM, Roger (sub1) wrote:
> On 3/13/2011 12:57 PM, Shane Youhouse wrote:
>>
>> ALSO: In reading up on 3-1000 and 4-1000 tubes, I noticed that one of
>> them actually goes into the output network losses, and Eimac puts them
>> about 10 percent..... IE, they say the PLATE output power is about 10
>> percent GREATER than the AMPLIFIER output power.
>>
>> SO, it made total sense, what Carl was saying... On a 1500 watt amp, it
>> would be normal to see 150 + watts 'lost'.
>
> The Palstar AT5K has a table in the manual that shows losses based on
> the impedance the tuner is seeing plus how the tuner is used. It
> demonstrates that losses can be as high as 16% (which is nearly all in
> the rotary inductor), but can be reduced to 3% or less with proper
> tuning. More C and less L.
>
> 73
>
> Roger (K8RI)
>
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