[Amps] Inductor Software?

[David Cutter]

Therefore don't use software or even a calculator or slide rule or 
arithmatic - use the charts in the handbooks.  The difference in inductance 
between tube and wire in a large diameter coil is easily compensated when 
tweeking which will also compensate for self capacitance and proximity.

I would use cheap coax with the sheath removed as a prototype then make a 
coil in tube.  Squeeze or stretch as required.  Proximity to nearby objects 
will be a factor that is hard and unnecessary to calculate : just tweek. 
Loads of fun.

David
G3UNA

> As this likely is going to be used on a band with a relatively wide
> range, say 40, 75, or even the
> 160 I was going to ask, what ever happened to the good old formula for a
> solenoid coil. You don't need to be precise, and should be able to
> change taps so it might be wise to have an extra turn or two.  Still,
> what will be highest voltage likely be at the feed point of a bobtail?
>
> To me this is sorta like the; "measure with a micrometer and cut with a
> chain saw".  How much accuracy do we really need?
>
> 73
>
> Roger (K8RI)
> >> Adrian MW1LCR
>>