Bi-polar design (revisited)

["Oxandale, Terry" <Toxandale-at-xxxxxxx> (by way of Terry Fritz <twftesla-at-xxxxxxxxxx>)]

Hello again.

> I received a ton of good advice and experience from this list (thanks
> again) about the Bi-polar I have started on. I do have another
> question to add to my list of questions that is outgrowing my list of
> answers.
> 
> My question relates to tuning. My impression (from all of your helpful
> information so far) is that the one and only primary resonant
> frequency will be applied to both secondaries, and that if one of the
> two secondary coils is out of tune, then adjustments to the primary
> coil are made to fix this (knowing that both coils are affected by
> this one adjustment). I am a bit confused in that; how can this out of
> tune condition be adjusted from the primary turns? If you adjust
> either primary, the resonant frequency may then be good for one coil,
> but not the other one, and visa versa. Is it then correct to assume
> the only true way to tune each secondary coil is by the terminal
> capacitance or by the inductance (number of turns) of the secondary
> instead? Would I be wrong in assuming that, for argument sake, that 2
> turns on one primary, and 6 turns on the other, results in a combined
> inductance, which with the capacitance, resonates at a one and only
> one correct frequency, which in this case, matches the frequency for
> both secondary circuits (assuming both secondary circuits are
> identical in every aspect)? Does the field configuration come into
> play at this point in that the 2 turn field will be different than the
> 6 turn field? Also, assuming that you used the same tap setting for
> both primaries, and still had a mismatch in the tuning of the
> secondaries, would not the most correct method of tuning be in the
> secondary circuit adjustments (terminal capacitance or number of turns
> of the secondary)?. Thanks ahead of time for your time and patience.
> 
> 
> 
> Un-Terry
> 
>