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'.
Which is ANOTHER reason I like direct fed antennas. :)
Guess when you start adding up the losses that way, and using coaxial
cable with the additional losses incurred with it (and the tuna at RADIO
end instead of remote), it's easy to see how the losses add up quickly.
Glad I went ladderline.
--Shane
KD6VXI
On Sun, 13 Mar 2011 06:58:12 -0700, Ron Youvan <ka4inm@tampabay.rr.com>
wrote:
> Shane KD6VXI Youhouse wrote:
>
>> It seems to me that the losses in a tuner typically will be effected by
>> the transformation ratio.
>
>> There is loss in any network that transforms impedance that I've been
>> able
>> to find.
>
> I think there are losses to everything. (but only in the resistances
> not in the reactance)
>
>> Circulating current in the tuna WILL cause heating, just as it does in a
>> pi net in your amplifier. The pi, L, etc. doesn't care what the
>> generator
>> is (Cblock or literally, Cload).
>
>> Correct me if I'm wrong... BUT, my tuna (Johnson Matchbox, 6 inch
>> spaced
>> #10 feeders to 160 inv v) gets warmer the larger transformation ratio is
>> being effected.
>
> I am sure the losses are proportional to the current in the
> resistance.
--
It's a sad state of affairs when your tubes don't have handles but your
dummy load does.
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