Also with capacitors that have a tolerance of + or - 5% I noticed that two
seemingly identical capacitor banks can have a different value, which can mean
a difference of good resonance or not, also the placement of objects in close
proximity to the coils will also affect them, for instance a hand or other object
which has capacitance or self capacitance when close to a resonant coil will add
capacitance and lower the resonant frequency, just like a load can do.
A variable capacitor means tuning can be precise and when the load changes
the resonant frequency can be altered to re-tune the device to the load.
Cheers
P.S. connecting a scope probe directly to a resonant coil should I imagine
alter the resonant frequency as well, with hi q setups all these things can be
frustrating because they can be compounding or counteracting it just
depends what and where is being affected.
..
seemingly identical capacitor banks can have a different value, which can mean
a difference of good resonance or not, also the placement of objects in close
proximity to the coils will also affect them, for instance a hand or other object
which has capacitance or self capacitance when close to a resonant coil will add
capacitance and lower the resonant frequency, just like a load can do.
A variable capacitor means tuning can be precise and when the load changes
the resonant frequency can be altered to re-tune the device to the load.
Cheers
P.S. connecting a scope probe directly to a resonant coil should I imagine
alter the resonant frequency as well, with hi q setups all these things can be
frustrating because they can be compounding or counteracting it just
depends what and where is being affected.
..
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