Darrell,
My comment about heating was in regards to saturation, which greatly
increases loss. At QRP levels a BL-1 will never saturate, even if it is
working into a very low or high impedance. OTOH, at high power, a
severe mismatch really *will* heat up the balun, and if it saturates,
it will become a lot less efficient, making losses much greater.
You're correct that efficiency of impedance transformation is the same
at any power level -- as long as the balun isn't in saturation.
73,
Wayne
On Aug 8, 2005, at 10:57 AM, Darrell Bellerive wrote:
On August 8, 2005 10:29 am, wayne burdick wrote:
at QRP levels, a large balun such
as the BL1 should have negligible heating loss over a very wide
impedance range.
I would have thought that the heating is a result of inefficiency. The
heat is
lower at QRP levels than at higher power levels since there is less
power to
produce heat. If a balun is converting 10% of energy into heat, then
more
heat is produced with 100 watts than 5 watts, but the loss is still
the same
10%. Am I wrong?
---
http://www.elecraft.com
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