[Amps] Re: L networks - Quiz

[Will Matney <craxd1@ezwv.com>]

A quick quiz (Pull one of Riches quizes) ;-)

What is the permeability of an air coil transformer and why is this the 
value?

Best,

Will



G3SEK said:

>But just because an ideal transformer can match impedances >with an 
even lower loaded Q, we cannot automatically assume >the same will be 
true for the link-coupled windings in a >typical Matchbox.

The matchbox does end up with variable Q, especially when you get a 
reactive component. Link coupling really needs a tight coupling so that 
hopefully the leakage reactance is minimised. This usually means few 
turns, tightly coupled. the Z match does the same, and under some loads, 
gets enough circulating current such that at 400 watts, the solder melts 
and the coils drop off - at least, in the KW one.

And yes, I did leave Zverev behind......

73

Peter G3RZP
_______________________________________________
Amps mailing list
Amps@contesting.com
http://lists.contesting.com/mailman/listinfo/amps