John Smith I wrote in news:esvehb$f2v$1
@registered.motzarella.org:

Owen Duffy wrote:

...
(BTW, about half the power is dissipated in a 1000+j1000 isolator.)
2000
+j2000 is becoming reasonably effective.
...

I have a 4:1 hybrid balun (4:1 voltage balun coupled up with a 1:1
current balun). Now and then I run the full california-kilowatt to it,
I have NEVER seen the thing REAL WARM unless running into a high
standing wave, but NEVER what I would call REAL HOT.

500+ watts would shortly make it so hot it would burn fingers and smoke
even the high temp thermaleze enamel off the windings (if the balun was
forced to dissipate that power!)

I don't see where half the power could have ever been "sunk" into the
balun, no matter what freq it has been operated at, 2-30. The windings
all look in excellent shape and the core in good condition ...

Or, perhaps I misunderstood your previous post.

Perhaps.

I don't understand the term "California Kilowatt".

I don't know if you are describing the same thing I modelled, I don't
think so.

It is often overlooked that the power of an SSB telephony signal averaged
over a longish time (but not accounting for the duty cycle of "overs") is
around 15dB (a little less for speech processing), so the heating effect
of 500W PEP telephony might be more like 15W.

Owen

Owen Duffy wrote in
:

John Smith I wrote in news:esvehb$f2v$1
@registered.motzarella.org:

Owen Duffy wrote:
It is often overlooked that the power of an SSB telephony signal
averaged over a longish time (but not accounting for the duty cycle of
"overs") is around 15dB (a little less for speech processing), so the
heating effect of 500W PEP telephony might be more like 15W.

Duh, guess who left a minus sign out, should read:

It is often overlooked that the power of an SSB telephony signal
averaged over a longish time (but not accounting for the duty cycle of
"overs") is around -15dB (a little less for speech processing), so the
heating effect of 500W PEP telephony might be more like 15W.

Owen

Owen Duffy wrote:

...
It is often overlooked that the power of an SSB telephony signal
averaged over a longish time (but not accounting for the duty cycle of
"overs") is around -15dB (a little less for speech processing), so the
heating effect of 500W PEP telephony might be more like 15W.

Owen

Hmmm, I just may pull that balun down and run a full KW into it hooked
to a dummy load to look at some temp readings over a range of bands/over
a time span ... maybe the thing has been dumping more heat than I am
aware of, time anyway to check out the system ...

JS